Commit Graph

147096 Commits

Author SHA1 Message Date
Eric Paris c28f7e56e9 fsnotify: parent event notification
inotify and dnotify both use a similar parent notification mechanism.  We
add a generic parent notification mechanism to fsnotify for both of these
to use.  This new machanism also adds the dentry flag optimization which
exists for inotify to dnotify.

Signed-off-by: Eric Paris <eparis@redhat.com>
Acked-by: Al Viro <viro@zeniv.linux.org.uk>
Cc: Christoph Hellwig <hch@lst.de>
2009-06-11 14:57:53 -04:00
Eric Paris 3be25f49b9 fsnotify: add marks to inodes so groups can interpret how to handle those inodes
This patch creates a way for fsnotify groups to attach marks to inodes.
These marks have little meaning to the generic fsnotify infrastructure
and thus their meaning should be interpreted by the group that attached
them to the inode's list.

dnotify and inotify  will make use of these markings to indicate which
inodes are of interest to their respective groups.  But this implementation
has the useful property that in the future other listeners could actually
use the marks for the exact opposite reason, aka to indicate which inodes
it had NO interest in.

Signed-off-by: Eric Paris <eparis@redhat.com>
Acked-by: Al Viro <viro@zeniv.linux.org.uk>
Cc: Christoph Hellwig <hch@lst.de>
2009-06-11 14:57:53 -04:00
Eric Paris 90586523eb fsnotify: unified filesystem notification backend
fsnotify is a backend for filesystem notification.  fsnotify does
not provide any userspace interface but does provide the basis
needed for other notification schemes such as dnotify.  fsnotify
can be extended to be the backend for inotify or the upcoming
fanotify.  fsnotify provides a mechanism for "groups" to register for
some set of filesystem events and to then deliver those events to
those groups for processing.

fsnotify has a number of benefits, the first being actually shrinking the size
of an inode.  Before fsnotify to support both dnotify and inotify an inode had

        unsigned long           i_dnotify_mask; /* Directory notify events */
        struct dnotify_struct   *i_dnotify; /* for directory notifications */
        struct list_head        inotify_watches; /* watches on this inode */
        struct mutex            inotify_mutex;  /* protects the watches list

But with fsnotify this same functionallity (and more) is done with just

        __u32                   i_fsnotify_mask; /* all events for this inode */
        struct hlist_head       i_fsnotify_mark_entries; /* marks on this inode */

That's right, inotify, dnotify, and fanotify all in 64 bits.  We used that
much space just in inotify_watches alone, before this patch set.

fsnotify object lifetime and locking is MUCH better than what we have today.
inotify locking is incredibly complex.  See 8f7b0ba1c8 as an example of
what's been busted since inception.  inotify needs to know internal semantics
of superblock destruction and unmounting to function.  The inode pinning and
vfs contortions are horrible.

no fsnotify implementers do allocation under locks.  This means things like
f04b30de3 which (due to an overabundance of caution) changes GFP_KERNEL to
GFP_NOFS can be reverted.  There are no longer any allocation rules when using
or implementing your own fsnotify listener.

fsnotify paves the way for fanotify.  In brief fanotify is a notification
mechanism that delivers the lisener both an 'event' and an open file descriptor
to the object in question.  This means that fanotify is pathname agnostic.
Some on lkml may not care for the original companies or users that pushed for
TALPA, but fanotify was designed with flexibility and input for other users in
mind.  The readahead group expressed interest in fanotify as it could be used
to profile disk access on boot without breaking the audit system.  The desktop
search groups have also expressed interest in fanotify as it solves a number
of the race conditions and problems present with managing inotify when more
than a limited number of specific files are of interest.  fanotify can provide
for a userspace access control system which makes it a clean interface for AV
vendors to hook without trying to do binary patching on the syscall table,
LSM, and everywhere else they do their things today.  With this patch series
fanotify can be implemented in less than 1200 lines of easy to review code.
Almost all of which is the socket based user interface.

This patch series builds fsnotify to the point that it can implement
dnotify and inotify_user.  Patches exist and will be sent soon after
acceptance to finish the in kernel inotify conversion (audit) and implement
fanotify.

Signed-off-by: Eric Paris <eparis@redhat.com>
Acked-by: Al Viro <viro@zeniv.linux.org.uk>
Cc: Christoph Hellwig <hch@lst.de>
2009-06-11 14:57:52 -04:00
Linus Torvalds c9059598ea Merge branch 'for-2.6.31' of git://git.kernel.dk/linux-2.6-block
* 'for-2.6.31' of git://git.kernel.dk/linux-2.6-block: (153 commits)
  block: add request clone interface (v2)
  floppy: fix hibernation
  ramdisk: remove long-deprecated "ramdisk=" boot-time parameter
  fs/bio.c: add missing __user annotation
  block: prevent possible io_context->refcount overflow
  Add serial number support for virtio_blk, V4a
  block: Add missing bounce_pfn stacking and fix comments
  Revert "block: Fix bounce limit setting in DM"
  cciss: decode unit attention in SCSI error handling code
  cciss: Remove no longer needed sendcmd reject processing code
  cciss: change SCSI error handling routines to work with interrupts enabled.
  cciss: separate error processing and command retrying code in sendcmd_withirq_core()
  cciss: factor out fix target status processing code from sendcmd functions
  cciss: simplify interface of sendcmd() and sendcmd_withirq()
  cciss: factor out core of sendcmd_withirq() for use by SCSI error handling code
  cciss: Use schedule_timeout_uninterruptible in SCSI error handling code
  block: needs to set the residual length of a bidi request
  Revert "block: implement blkdev_readpages"
  block: Fix bounce limit setting in DM
  Removed reference to non-existing file Documentation/PCI/PCI-DMA-mapping.txt
  ...

Manually fix conflicts with tracing updates in:
	block/blk-sysfs.c
	drivers/ide/ide-atapi.c
	drivers/ide/ide-cd.c
	drivers/ide/ide-floppy.c
	drivers/ide/ide-tape.c
	include/trace/events/block.h
	kernel/trace/blktrace.c
2009-06-11 11:10:35 -07:00
Linus Torvalds 0a33f80a83 Merge git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-2.6-nmw
* git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-2.6-nmw: (25 commits)
  GFS2: Merge gfs2_get_sb into gfs2_get_sb_meta
  GFS2: Fix cache coherency between truncate and O_DIRECT read
  GFS2: Fix locking issue mounting gfs2meta fs
  GFS2: Remove unused variable
  GFS2: smbd proccess hangs with flock() call.
  GFS2: Remove args subdir from gfs2 sysfs files
  GFS2: Remove lockstruct subdir from gfs2 sysfs files
  GFS2: Move gfs2_unlink_ok into ops_inode.c
  GFS2: Move gfs2_readlinki into ops_inode.c
  GFS2: Move gfs2_rmdiri into ops_inode.c
  GFS2: Merge mount.c and ops_super.c into super.c
  GFS2: Clean up some file names
  GFS2: Be more aggressive in reclaiming unlinked inodes
  GFS2: Add a rgrp bitmap full flag
  GFS2: Improve resource group error handling
  GFS2: Don't warn when delete inode fails on ro filesystem
  GFS2: Update docs
  GFS2: Umount recovery race fix
  GFS2: Remove a couple of unused sysfs entries
  GFS2: Add commit= mount option
  ...
2009-06-11 10:36:12 -07:00
Linus Torvalds c29f5ec022 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/bp/bp
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/bp/bp: (26 commits)
  amd64_edac: add MAINTAINERS entry
  EDAC: do not enable modules by default
  amd64_edac: do not enable module by default
  amd64_edac: add module registration routines
  amd64_edac: add ECC reporting initializers
  amd64_edac: add EDAC core-related initializers
  amd64_edac: add error decoding logic
  amd64_edac: add ECC chipkill syndrome mapping table
  amd64_edac: add per-family descriptors
  amd64_edac: add F10h-and-later methods-p3
  amd64_edac: add F10h-and-later methods-p2
  amd64_edac: add F10h-and-later methods-p1
  amd64_edac: add k8-specific methods
  amd64_edac: assign DRAM chip select base and mask in a family-specific way
  amd64_edac: add helper to dump relevant registers
  amd64_edac: add DRAM address type conversion facilities
  amd64_edac: add functionality to compute the DRAM hole
  amd64_edac: add sys addr to memory controller mapping helpers
  amd64_edac: add memory scrubber interface
  amd64_edac: add MCA error types
  ...
2009-06-11 10:33:36 -07:00
Linus Torvalds d3d07d941f Merge git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6: (266 commits)
  sh: Tie sparseirq in to Kconfig.
  sh: Wire up sys_rt_tgsigqueueinfo.
  sh: Fix sys_pwritev() syscall table entry for sh32.
  sh: Fix sh4a llsc-based cmpxchg()
  sh: sh7724: Add JPU support
  sh: sh7724: INTC setting update
  sh: sh7722 clock framework rewrite
  sh: sh7366 clock framework rewrite
  sh: sh7343 clock framework rewrite
  sh: sh7724 clock framework rewrite V3
  sh: sh7723 clock framework rewrite V2
  sh: add enable()/disable()/set_rate() to div6 code
  sh: add AP325RXA mode pin configuration
  sh: add Migo-R mode pin configuration
  sh: sh7722 mode pin definitions
  sh: sh7724 mode pin comments
  sh: sh7723 mode pin V2
  sh: rework mode pin code
  sh: clock div6 helper code
  sh: clock div4 frequency table offset fix
  ...
2009-06-11 10:08:33 -07:00
Linus Torvalds 6cd8e300b4 Merge branch 'kvm-updates/2.6.31' of git://git.kernel.org/pub/scm/virt/kvm/kvm
* 'kvm-updates/2.6.31' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (138 commits)
  KVM: Prevent overflow in largepages calculation
  KVM: Disable large pages on misaligned memory slots
  KVM: Add VT-x machine check support
  KVM: VMX: Rename rmode.active to rmode.vm86_active
  KVM: Move "exit due to NMI" handling into vmx_complete_interrupts()
  KVM: Disable CR8 intercept if tpr patching is active
  KVM: Do not migrate pending software interrupts.
  KVM: inject NMI after IRET from a previous NMI, not before.
  KVM: Always request IRQ/NMI window if an interrupt is pending
  KVM: Do not re-execute INTn instruction.
  KVM: skip_emulated_instruction() decode instruction if size is not known
  KVM: Remove irq_pending bitmap
  KVM: Do not allow interrupt injection from userspace if there is a pending event.
  KVM: Unprotect a page if #PF happens during NMI injection.
  KVM: s390: Verify memory in kvm run
  KVM: s390: Sanity check on validity intercept
  KVM: s390: Unlink vcpu on destroy - v2
  KVM: s390: optimize float int lock: spin_lock_bh --> spin_lock
  KVM: s390: use hrtimer for clock wakeup from idle - v2
  KVM: s390: Fix memory slot versus run - v3
  ...
2009-06-11 10:03:30 -07:00
Linus Torvalds ddbb868493 Merge git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6:
  cifs: remove never-used in6_addr option
  cifs: add addr= mount option alias for ip=
  [CIFS] Add mention of new mount parm (forceuid) to cifs readme
  cifs: make overriding of ownership conditional on new mount options
  cifs: fix IPv6 address length check
  cifs: clean up set_cifs_acl interfaces
  cifs: reorganize get_cifs_acl
  [CIFS] Update readme to indicate change to default mount (serverino)
  cifs: make serverino the default when mounting
  cifs: rename cifs_iget to cifs_root_iget
  cifs: make cnvrtDosUnixTm take a little-endian args and an offset
  cifs: have cifs_NTtimeToUnix take a little-endian arg
  cifs: tighten up default file_mode/dir_mode
  cifs: fix artificial limit on reading symlinks
2009-06-11 10:02:46 -07:00
Linus Torvalds 3296ca27f5 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/security-testing-2.6
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/security-testing-2.6: (44 commits)
  nommu: Provide mmap_min_addr definition.
  TOMOYO: Add description of lists and structures.
  TOMOYO: Remove unused field.
  integrity: ima audit dentry_open failure
  TOMOYO: Remove unused parameter.
  security: use mmap_min_addr indepedently of security models
  TOMOYO: Simplify policy reader.
  TOMOYO: Remove redundant markers.
  SELinux: define audit permissions for audit tree netlink messages
  TOMOYO: Remove unused mutex.
  tomoyo: avoid get+put of task_struct
  smack: Remove redundant initialization.
  integrity: nfsd imbalance bug fix
  rootplug: Remove redundant initialization.
  smack: do not beyond ARRAY_SIZE of data
  integrity: move ima_counts_get
  integrity: path_check update
  IMA: Add __init notation to ima functions
  IMA: Minimal IMA policy and boot param for TCB IMA policy
  selinux: remove obsolete read buffer limit from sel_read_bool
  ...
2009-06-11 10:01:41 -07:00
Linus Torvalds e893123c73 Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4
* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4: (49 commits)
  ext4: Avoid corrupting the uninitialized bit in the extent during truncate
  ext4: Don't treat a truncation of a zero-length file as replace-via-truncate
  ext4: fix dx_map_entry to support 256k directory blocks
  ext4: truncate the file properly if we fail to copy data from userspace
  ext4: Avoid leaking blocks after a block allocation failure
  ext4: Change all super.c messages to print the device
  ext4: Get rid of EXTEND_DISKSIZE flag of ext4_get_blocks_handle()
  ext4: super.c whitespace cleanup
  jbd2: Fix minor typos in comments in fs/jbd2/journal.c
  ext4: Clean up calls to ext4_get_group_desc()
  ext4: remove unused function __ext4_write_dirty_metadata
  ext2: Fix memory leak in ext2_fill_super() in case of a failed mount
  ext3: Fix memory leak in ext3_fill_super() in case of a failed mount
  ext4: Fix memory leak in ext4_fill_super() in case of a failed mount
  ext4: down i_data_sem only for read when walking tree for fiemap
  ext4: Add a comprehensive block validity check to ext4_get_blocks()
  ext4: Clean up ext4_get_blocks() so it does not depend on bh_result->b_state
  ext4: Merge ext4_da_get_block_write() into mpage_da_map_blocks()
  ext4: Add BUG_ON debugging checks to noalloc_get_block_write()
  ext4: Add documentation to the ext4_*get_block* functions
  ...
2009-06-11 10:00:50 -07:00
Linus Torvalds 27951daa71 Merge branch 'for-2.6.31' of git://git.kernel.org/pub/scm/linux/kernel/git/bart/ide-2.6
* 'for-2.6.31' of git://git.kernel.org/pub/scm/linux/kernel/git/bart/ide-2.6: (28 commits)
  ide-tape: fix debug call
  alim15x3: Remove historical hacks, re-enable init_hwif for PowerPC
  ide-dma: don't reset request fields on dma_timeout_retry()
  ide: drop rq->data handling from ide_map_sg()
  ide-atapi: kill unused fields and callbacks
  ide-tape: simplify read/write functions
  ide-tape: use byte size instead of sectors on rw issue functions
  ide-tape: unify r/w init paths
  ide-tape: kill idetape_bh
  ide-tape: use standard data transfer mechanism
  ide-tape: use single continuous buffer
  ide-atapi,tape,floppy: allow ->pc_callback() to change rq->data_len
  ide-tape,floppy: fix failed command completion after request sense
  ide-pm: don't abuse rq->data
  ide-cd,atapi: use bio for internal commands
  ide-atapi: convert ide-{floppy,tape} to using preallocated sense buffer
  ide-cd: convert to using generic sense request
  ide: add helpers for preparing sense requests
  ide-cd: don't abuse rq->buffer
  ide-atapi: don't abuse rq->buffer
  ...
2009-06-11 10:00:03 -07:00
Linus Torvalds 59c288ffb6 Merge branches 'frv' and 'mn10300'
* frv:
  FRV: Implement new-style ptrace
  FRV: Don't turn on TIF_SYSCALL_TRACE unconditionally in syscall prologue
  FRV: Implement TIF_NOTIFY_RESUME
  FRV: Remove in-kernel strace code
  FRV: BUG to BUG_ON changes
  FRV: bitops: Change the bitmap index from int to unsigned long

* mn10300:
  MN10300: Add utrace/tracehooks support
  MN10300: Don't set the dirty bit in the DTLB entries in the TLB-miss handler
2009-06-11 09:02:31 -07:00
David Howells 5d289964e1 MN10300: Add utrace/tracehooks support
Add utrace/tracehooks support to MN10300.

Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-11 09:02:20 -07:00
David Howells fd4f683d04 MN10300: Don't set the dirty bit in the DTLB entries in the TLB-miss handler
Remove the special handling for the Data TLB entry dirty bit in the TLB-miss
handler.  As the code stands, all that it does is to cause us to take a second
data address exception to set the dirty bit.  Instead, we can just let
pte_mkdirty() set the bit.

Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-11 09:02:20 -07:00
David Howells 4a3b989322 FRV: Implement new-style ptrace
Implement the new-style ptrace for FRV, including adding appropriate
tracehooks.

Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-11 09:01:26 -07:00
David Howells 24ceb7e8a6 FRV: Don't turn on TIF_SYSCALL_TRACE unconditionally in syscall prologue
Don't turn on TIF_SYSCALL_TRACE unconditionally in syscall prologue in FRV's
entry.S.  This was originally for debugging stuff and should have been removed
a long time ago.

Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-11 09:01:26 -07:00
David Howells b7bab880c7 FRV: Implement TIF_NOTIFY_RESUME
Implement the TIF_NOTIFY_RESUME thread flag, making it call do_notify_resume()
which then clears it.  This will be made use of later by tracehooks in the
new-style ptrace implementation

Also discard TIF_IRET as that's not used by FRV.

Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-11 09:01:26 -07:00
David Howells aa1913c021 FRV: Remove in-kernel strace code
Remove in-kernel strace code from the FRV arch as it's not really needed any
more.

Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-11 09:01:26 -07:00
Stoyan Gaydarov db5c444eeb FRV: BUG to BUG_ON changes
Change some BUG()'s to BUG_ON()'s.

Signed-off-by: Stoyan Gaydarov <stoyboyker@gmail.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-11 09:01:26 -07:00
Justin Chen d2f11bf7fc FRV: bitops: Change the bitmap index from int to unsigned long
Change the index to unsigned long in all bitops for [frv]

Signed-off-by: Justin Chen <justin.chen@hp.com>
Reviewed-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-11 09:01:26 -07:00
Linus Torvalds 49c355617f Merge branch 'serial-from-alan'
* serial-from-alan: (79 commits)
  moxa: prevent opening unavailable ports
  imx: serial: use tty_encode_baud_rate to set true rate
  imx: serial: add IrDA support to serial driver
  imx: serial: use rational library function
  lib: isolate rational fractions helper function
  imx: serial: handle initialisation failure correctly
  imx: serial: be sure to stop xmit upon shutdown
  imx: serial: notify higher layers in case xmit IRQ was not called
  imx: serial: fix one bit field type
  imx: serial: fix whitespaces (no changes in functionality)
  tty: use prepare/finish_wait
  tty: remove sleep_on
  sierra: driver interface blacklisting
  sierra: driver urb handling improvements
  tty: resolve some sierra breakage
  timbuart: Fix the termios logic
  serial: Added Timberdale UART driver
  tty: Add URL for ttydev queue
  devpts: unregister the file system on error
  tty: Untangle termios and mm mutex dependencies
  ...
2009-06-11 08:57:47 -07:00
Dirk Eibach f0e8527726 moxa: prevent opening unavailable ports
In moxa.c there are 32 minor numbers reserved for each device. The
number of ports actually available per device is stored in
moxa_board_conf->numPorts. This number is not considered in moxa_open().
Opening a port that is not available results in a kernel oops.
This patch adds a test to moxa_open() that prevents opening unavailable
ports.

Signed-off-by: Dirk Eibach <eibach@gdsys.de>
Signed-off-by: Jiri Slaby <jirislaby@gmail.com>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-11 08:51:09 -07:00
Oskar Schirmer d7f8d437bd imx: serial: use tty_encode_baud_rate to set true rate
real baud rate may be different from the one requested.
for upper layers, set the nearest value to the real rate
in favour of the rate previously requested.

Signed-off-by: Oskar Schirmer <os@emlix.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-11 08:51:09 -07:00
Fabian Godehardt b6e4913834 imx: serial: add IrDA support to serial driver
Using the iMX serial driver with an IrDA device
needs extra peripheral settings and specific
timing depending on the transmitter circuitry used.

Signed-off-by: Fabian Godehardt <fg@emlix.com>
Signed-off-by: Oskar Schirmer <os@emlix.com>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-11 08:51:08 -07:00
Oskar Schirmer 534fca068e imx: serial: use rational library function
for calculation of numerator and denominator
used in baud rate setting, use generic library function
for optimum settings.

Signed-off-by: Oskar Schirmer <os@emlix.com>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-11 08:51:08 -07:00
Oskar Schirmer 8759ef32d9 lib: isolate rational fractions helper function
Provide a helper function to determine optimum numerator
denominator value pairs taking into account restricted
register size. Useful especially with PLL and other clock
configurations.

Signed-off-by: Oskar Schirmer <os@emlix.com>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-11 08:51:08 -07:00
Daniel Glöckner 9f322ad064 imx: serial: handle initialisation failure correctly
correctly de-initialise device when setting up failed,
call to pdata->exit() was missing.

Signed-off-by: Daniel Glöckner <dg@emlix.com>
Signed-off-by: Oskar Schirmer <os@emlix.com>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-11 08:51:08 -07:00
Fabian Godehardt 2e1463922a imx: serial: be sure to stop xmit upon shutdown
needed to avoid continued transmission by hardware
while software already shuts down, which might
cause dangling characters to show up in hardware
queues when restarting the device.

Signed-off-by: Fabian Godehardt <fg@emlix.com>
Signed-off-by: Oskar Schirmer <os@emlix.com>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-11 08:51:08 -07:00
Fabian Godehardt 977757311e imx: serial: notify higher layers in case xmit IRQ was not called
upper layers, namely line discipline, need to be notified
when transmission of more data is possible. For spurious
cases, where IRQ handling does not supply notification
for sure, it is given additionally here, when data has just
been transmitted and space in the buffer will most probably
be available.

Signed-off-by: Fabian Godehardt <fg@emlix.com>
Signed-off-by: Oskar Schirmer <os@emlix.com>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-11 08:51:08 -07:00
Daniel Glöckner 26bbb3ff1f imx: serial: fix one bit field type
"have_rtscts" is assigned 1, while it is declared
int:1, two's complement, which can hold 0 and -1
only. The code works, as the upper bits are cut
off, and tests are done against 0 only.

Nonetheless, correctly declaring the bit field
as unsigned int:1 renders the code more robust.

Signed-off-by: Daniel Glöckner <dg@emlix.com>
Signed-off-by: Oskar Schirmer <os@emlix.com>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-11 08:51:08 -07:00
Oskar Schirmer d3810cd4d7 imx: serial: fix whitespaces (no changes in functionality)
Signed-off-by: Oskar Schirmer <os@emlix.com>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-11 08:51:07 -07:00
Jiri Slaby 3e3b5c0877 tty: use prepare/finish_wait
Use prepare_to_wait and finish_wait instead of add_wait_queue and
remove_wait_queue.

This avoids us setting a task state.

Signed-off-by: Jiri Slaby <jirislaby@gmail.com>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-11 08:51:07 -07:00
Jiri Slaby 5fc5b42a3b tty: remove sleep_on
Use wait_event instead of sleep_on in tty_block_til_ready.

Wait for ASYNC_CLOSING flag being 0.

Signed-off-by: Jiri Slaby <jirislaby@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-11 08:51:07 -07:00
Elina Pasheva 4db2299da2 sierra: driver interface blacklisting
Interface blacklisting is necessary for non-serial interfaces that are handled
by a different driver. The interface blacklisting is implemented in sierra
driver per device. Each device in need of a blacklist has a static information
array kept in the driver. This array contains the interface numbers that are
blacklisted. The pointer for each blacklist array and the length
of that blacklist are 'bundled' in data structure sierra_iface_info. A pointer
to this information is set in id_table when the device is added to the id_table.

The following is summary of changes we have made to sierra.c driver in
this patch dealing with interface blacklisting support:
- Added data structure sierra_iface_info and function is_blacklisted()
to support blacklisting
- Modified sierra_probe() to handle blacklisted interfaces accordingly
- Improved comments in id_table
- Added new device in id_table with blacklist interface support

Signed-off-by: Elina Pasheva <epasheva@sierrawireless.com>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-11 08:51:07 -07:00
Elina Pasheva b9a44bc19f sierra: driver urb handling improvements
[Folded from eight patches into one as the original set according to the
 author "All of the patches need to be applied to obtain a working product"
 so keeping them split seems unhelpful

 Merge fixes done versus other conflicting changes and moved the
 spin_lock_init from open to setup time -- Alan]

Summary of the changes and code re-organization in this patch:

- The memory for urbs is allocated and urbs are submitted only for the active
  interfaces (instead of pre-allocating these for all interfaces). This will
  save memory especially in the case of using composite devices.
- The code has been re-organized and functionality has been extracted from
  sierra_startup(), sierra_shutdown(), sierra_open(), sierra_close() and added
  in helper functions sierra_release_urb(), sierra_stop_rx_urbs(),
  sierra_submit_rx_urbs() and sierra_setup_urb()

- Added function sierra_release_urb() to free an urb and its transfer
buffer.
- Removed unecessary include file reference and comment.
- Added function sierra_stop_rx_urbs() that takes care of the release of
receive and interrupt urbs. This function is to be called by sierra_close()
whenever an interface is de-activated.
- Added new function sierra_submit_rx_urbs() that handles the submission of
receive urbs and interrupt urbs (if any) during the interface activation.
This function is to be called by sierra_open(). Added a second parameter to
pass the memory allocation (as suggested by Oliver Neukum) so that this
function can be used in post_reset() and resume().
- Added new function sierra_setup_urb() that contains the functionality to
allocate an urb, fill bulk urb using the supplied memory allocation flag
and release urb upon error. Added parameter so that the caller pass the
memory allocation flag for flexibility.
- Moved sierra_close() before sierra_open() to resolve dependencies
introduced by the code reorganization.
- Modified sierra_close() to call sierra_stop_rx_urbs() and
sierra_release_urb() functions added in previous patch.
- Modified sierra_open() to call sierra_setup_urb() and sierra_submit_rx_urbs()
functions; note urbs are allocated and submitted for each activated interface.
- Modified sierra_startup() so that allocation of urbs happens whenever an
interface is activated (urb allocation is moved to sierra_open()).
- Modified sierra_shutdown() so that urbs are freed whenever an interface is
de-activated (urb freeing moved to sierra_close() as shown in previous patch
from the series)
- Removed unecessary data structure from sierra_port_private_data
- Suppress an entry in logs by not re-submitting an urb when usb_submit_urb()
returns -EPERM, as this shows that usb_kill_urb() is running (as suggested by
Oliver Neukum)

Signed-off-by: Elina Pasheva <epasheva@sierrawireless.com>
Signed-off-by: Alan Cox <alan.cox@linux.intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-11 08:51:07 -07:00
Alan Cox 00b040deca tty: resolve some sierra breakage
The various merges into the sierra driver inadvertently undid
commit 212b8f0c3f by Elina Pasheva
<epasheva@sierrawireless.com>. Put it back so the OBEX port works again.

Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-11 08:51:07 -07:00
Alan Cox 7d55deaf50 timbuart: Fix the termios logic
The driver only handles speeds but it fails to return the current values
for the hardware features it does not support.

Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-11 08:51:06 -07:00
Richard Röjfors 34aec59184 serial: Added Timberdale UART driver
Driver for the UART found in the Timberdale FPGA

Signed-off-by: Richard Röjfors <richard.rojfors.ext@mocean-labs.com>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-11 08:51:06 -07:00
Alan Cox e960bf73dd tty: Add URL for ttydev queue
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-11 08:51:06 -07:00
Alan Cox 93d5581e20 devpts: unregister the file system on error
Closes-bug: http://bugzilla.kernel.org/show_bug.cgi?id=13429

Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-11 08:51:06 -07:00
Alan Cox 26a2e20f4a tty: Untangle termios and mm mutex dependencies
Although this doesn't cause any problems it could potentially do so for
future mmap using devices. No real work is needed to sort it out so untangle
it before it causes problems

Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-11 08:51:06 -07:00
Mike Frysinger 0b91421857 tty: bfin_jtag_comm: emulate a TTY over the Blackfin EMUDAT/JTAG interface
The Blackfin JTAG interface has a 4 byte generic data field (EMUDAT).  With
a little creative thinking, we can turn this into a TTY device.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-11 08:51:06 -07:00
Alan Cox 7e9cd3a617 ftdi_sio: don't override modem bits
The new open/close logic handles DTR and friends, so don't do it in our own
open routine as well.

Signed-off-by: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-11 08:51:06 -07:00
Alan Cox 7f8d09eae2 tty: fix bluetooth scribbling on low latency flags
Bluetooth shouldn't be doing this as most drivers don't support the flag,
furthermore it shouldn't be needed with newer buffering. This becomes rather
more visible as the locking fixes make the abuse of low_latency visible as
spew on the users console/dmesg.

Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-11 08:51:05 -07:00
Alan Cox 557aaa7ffa ft232: support the ASYNC_LOW_LATENCY flag
This allows users to use the standard setserial command with this FT232
feature as well as obscure chip specific interfaces we have now. We keep
track of and respect the sysfs value for non-low-latency cases. In theory we
could do smart stuff with VTIME and the like but this seems of questionable
worth.

Closes-bug: http://bugzilla.kernel.org/show_bug.cgi?id=9120
Signed-off-by: Alan Cox <alan@linux.intel.com)
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-11 08:51:05 -07:00
Craig Shelley 4cc27bd6d7 USB: CP210X Replace CP2101 with CP210x
This patch replaces the string "CP2101" with "CP210x" within cp210x.c
This is to reduce confusion about the fact that the driver is actually
compatible with CP2101, CP2102 and CP2103 devices.

Signed-off-by: Craig Shelley <craig@microtron.org.uk>

(Fixed some collisions merging)

Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-11 08:51:05 -07:00
Craig Shelley 93ef1f1fbc USB: CP210X Use official request code definitions
The CP210X driver was developed without official device specifications.
This has lead to an incorrect assumption that all GET request codes are
equal to the corresponding SET request code +1.
This patch removes this incorrect assumption, and uses request code
definitions based on the updated GPL driver from SiLabs.
This modification is needed before extended functionality such as GPIO
on CP2103 can be supported.

Signed-off-by: Craig Shelley <craig@microtron.org.uk>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-11 08:51:05 -07:00
Craig Shelley b7c7cbc898 USB: CP210X Add device IDs
Signed-off-by: Craig Shelley <craig@microtron.org.uk>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-11 08:51:05 -07:00
Sonic Zhang 2860b79111 Blackfin Serial Driver: disable dma rx interrupt only rather than all irqs
The UART RX handling code isn't exactly speeding, so don't go disabling
all interrupts when processing the buffer.  Just disable the relevant DMA
interrupt.  This greatly improves latency of the system when utilizing the
UART.

Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-11 08:51:05 -07:00