Kill private write fifo and use the already allocated port write fifo
instead.
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Remove the vendor and product module parameters which were added a long
time ago when we did not have the dynamic sysfs interface to add
new device ids (and which isn't limited to a single new vid/pid pair).
A vid/pid pair can be added dynamically using sysfs, for example:
echo 0403 1234 >/sys/bus/usb-serial/drivers/ftdi_sio/new_id
Also fix up the in-code comment that got the sysfs path wrong.
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Do not raise DTR/RTS a second time in set_termios at open -- this has
already been taken care of by the tty layer.
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Do not use zeroed termios data to determine when to unconditionally
configure the device at open.
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Make sure set_termios is not called with uninitialised data at open. The
old termios struct is currently not used, but pass NULL instead to avoid
future problems (e.g. stack data leak).
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Only log the tty_flags in process_read_urb on errors.
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Break out baud-rate handling from set_termios.
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Remove unnecessary tests for open and write operations as these are set
to the generic implementations by usb-serial core if left unset by a
subdriver.
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The port drain delay is constant and should be set at port probe rather
than open.
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Since commit 957dacae ("TTY: fix DTR not being dropped on hang up")
dtr_rts is no longer called for uninitialised ports (e.g. after
a disconnect), which removes the need to grab the disconnect mutex.
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Since commit 31ca020b ("TTY: wake up processes last at hangup") there no
longer any need to check the hupping flag in the generic tiocmiwait
implementation, so remove it.
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Remove defensive test from set_termios which is never called with a NULL
tty.
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Now that no usb misc driver is looking for CONFIG_USB_DEBUG, or DEBUG,
don't enable it in the Makefile, as that's pointless.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Now that we don't use the dbg() macro, remove it, and the module
parameter. Also fix up the "dump_data" function to properly use the
dynamic debug core and the correct printk options, and don't call it
twice per function, as the data doesn't change from the beginning and
the end of the call.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Don't use a custom debug macro for just one driver, instead rely on the
in-kernel dynamic debugging logic, which can handle this much better.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Remove the unneeded tracing macros in this driver. The kernel has a
built-in trace function that can be used if this is really still needed.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Use the pr_* calls instead, which are much more descriptive.
Cc: Juergen Stuber <starblue@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Now that we don't use the dbg() macro, remove it, and the module
parameter. Also fix up the "dump_data" function to properly use the
dynamic debug core and the correct printk options, and don't call it
twice per function, as the data doesn't change from the beginning and
the end of the call.
Cc: Juergen Stuber <starblue@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Don't use a custom debug macro for just one driver, instead rely on the
in-kernel dynamic debugging logic, which can handle this much better.
Cc: Juergen Stuber <starblue@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Remove the unneeded tracing macros in this driver. The kernel has a
built-in trace function that can be used if this is really still needed.
Cc: Juergen Stuber <starblue@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
We want to get rid of CONFIG_USB_DEBUG, so remove the reliance of the
ldusb driver on it. Don't use the custom macro, or a special module
parameter, instead, rely on the in-kernel dynamic debugging
infrastructure, which is much easier to use, and consistant across the
whole kernel.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This branch contains a couple of minor bug fixes and documentation
additions, but the bulk of it are several changes to the MAINTAINERS
file regarding the subsystems I've been involved with.
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Merge tag 'devicetree-for-linus' of git://git.secretlab.ca/git/linux
Pull device tree bug fixes and maintainership updates from Grant Likely:
"This branch contains a couple of minor bug fixes and documentation
additions, but the bulk of it are several changes to the MAINTAINERS
file regarding the subsystems I've been involved with"
* tag 'devicetree-for-linus' of git://git.secretlab.ca/git/linux:
of/irq: init struct resource to 0 in of_irq_to_resource()
of/irq: Avoid calling list_first_entry() for empty list
of: add vendor prefixes for hisilicon
of: add vendor prefix for Qualcomm Atheros, Inc.
MAINTAINERS: Fix incorrect status tag
MAINTAINERS: Refactor device tree maintainership
MAINTAINERS: Change device tree mailing list
MAINTAINERS: Remove Grant Likely
Pull cgroup changes from Tejun Heo:
"This contains two patches, both of which aren't fixes per-se but I
think it'd be better to fast-track them.
One removes bcache_subsys_id which was added without proper review
through the block tree. Fortunately, bcache cgroup code is
unconditionally disabled, so this was never exposed to userland. The
cgroup subsys_id is removed. Kent will remove the affected (disabled)
code through bcache branch.
The other simplifies task_group_path_from_hierarchy(). The function
doesn't currently have in-kernel users but there are external code and
development going on dependent on the function and making the function
available for 3.11 would make things go smoother"
* 'for-3.11-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup:
cgroup: replace task_cgroup_path_from_hierarchy() with task_cgroup_path()
cgroup: remove bcache_subsys_id which got added stealthily
Pull drm fixes from Dave Airlie:
"This is just a regular fixes pull, mostly nouveau and i915, the i915
ones fix RC6 on Sandybridge after suspend/resume, which I think people
have be wanting for quite a while!
Now you shouldn't wish for more patches, as the new mutex/reservation
code found a number of problems with the qxl driver, and it currently
makes lockdep angry, I'm working on a set of fixes for it, but its a
bit large, I'll submit them separately later today or tomorrow once
I've banged on them a bit more, just warning you in advance :-)"
Yeah, I'm definitely over the whole "wish for more patches" thing.
* 'drm-fixes' of git://people.freedesktop.org/~airlied/linux:
drm/crtc-helper: explicit DPMS on after modeset
drm/i915: fix up gt init sequence fallout
drm/i915: Serialize almost all register access
drm/i915: quirk no PCH_PWM_ENABLE for Dell XPS13 backlight
drm/i915: correctly restore fences with objects attached
drm/i915: Fix dereferencing invalid connectors in is_crtc_connector_off()
drm/i915: Sanitize shared dpll state
drm/i915: fix long-standing SNB regression in power consumption after resume v2
drm/i915: Preserve the DDI_A_4_LANES bit from the bios
drm/i915: fix pfit regression for non-autoscaled resolutions
drm/i915: fix up readout of the lvds dither bit on gen2/3
drm/nouveau: do not allow negative sizes for now
drm/nouveau: add falcon interrupt handler
drm/nouveau: use dedicated channel for async moves on GT/GF chipsets.
drm/nouveau: bump fence timeout to 15 seconds
drm/nouveau: do not unpin in nouveau_gem_object_del
drm/nv50/kms: fix pin refcnt leaks
drm/nouveau: fix some error-path leaks in fbcon handling code
drm/nouveau: fix locking issues in page flipping paths
Fix __wait_on_atomic_t() so that it calls the action func if the counter != 0
rather than if the counter is 0 so as to be analogous to __wait_on_bit().
Thanks to Yacine who found this by visual inspection.
This will affect FS-Cache in that it will could fail to sleep correctly when
trying to clean up after a netfs cookie is withdrawn.
Reported-by: Yacine Belkadi <yacine.belkadi.1@gmail.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Reviewed-by: Jeff Layton <jlayton@redhat.com>
cc: Milosz Tanski <milosz@adfin.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
slot->response is a 64 bit quantity (and accessed as such), but its alignment
is only 32 bits. This doesn't cause a problem on x86, but apparently causes a
kernel panic on Tile:
Stack dump complete Kernel panic - not syncing:
Kernel unalign fault running the idle task!
Starting stack dump of tid 0, pid 0 (swapper) on cpu 1 at cycle 341586172541
frame 0: 0xfffffff700140ee0 dump_stack+0x0/0x20 (sp 0xfffffe43ffedf420)
frame 1: 0xfffffff700283270 panic+0x150/0x3a0 (sp 0xfffffe43ffedf420)
frame 2: 0xfffffff70012bff8 jit_bundle_gen+0xfd8/0x27e0 (sp 0xfffffe43ffedf4c8)
frame 3: 0xfffffff7003b5b68 do_unaligned+0xc0/0x5a0 (sp 0xfffffe43ffedf710)
frame 4: 0xfffffff70044ca78 handle_interrupt+0x270/0x278 (sp 0xfffffe43ffedf840)
<interrupt 17 while in kernel mode>
frame 5: 0xfffffff7002ac370 mvs_slot_complete+0x5f0/0x12a0 (sp 0xfffffe43ffedfa90)
frame 6: 0xfffffff7002abec0 mvs_slot_complete+0x140/0x12a0 (sp 0xfffffe43ffedfa90)
frame 7: 0xfffffff7005cc840 mvs_int_rx+0x140/0x2a0 (sp 0xfffffe43ffedfb00)
frame 8: 0xfffffff7005bbaf0 mvs_94xx_isr+0xd8/0x2b8 (sp 0xfffffe43ffedfb68)
frame 9: 0xfffffff700658ba0 mvs_tasklet+0x128/0x1f8 (sp 0xfffffe43ffedfba8)
frame 10: 0xfffffff7003e8230 tasklet_action+0x178/0x2c8 (sp 0xfffffe43ffedfbe0)
frame 11: 0xfffffff700103850 __do_softirq+0x210/0x398 (sp 0xfffffe43ffedfc40)
frame 12: 0xfffffff700180308 do_softirq+0xc8/0x140 (sp 0xfffffe43ffedfcd8)
frame 13: 0xfffffff7000bd7f0 irq_exit+0xb0/0x158 (sp 0xfffffe43ffedfcf0)
frame 14: 0xfffffff70013fa58 tile_dev_intr+0x1d8/0x2f0 (sp 0xfffffe43ffedfd00)
frame 15: 0xfffffff70044ca78 handle_interrupt+0x270/0x278 (sp 0xfffffe43ffedfd40)
<interrupt 30 while in kernel mode>
frame 16: 0xfffffff700143e68 _cpu_idle_nap+0x0/0x18 (sp 0xfffffe43ffedffb0)
frame 17: 0xfffffff700482480 cpu_idle+0x310/0x428 (sp 0xfffffe43ffedffb0)
Since the check is just for non-zero, split it to be two 32 bit accesses
(preserving speed in the fast path) and do a get_unaligned() in the slow path.
This is a modification of a wholly get_unaligned patch submitted by Paul Guo
Reported-by: Paul Guo <ggang@tilera.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
In the situation that a writer fails to copy data from userspace it will reset
the write offset to the value it had before it went to sleep. This discarding
any messages written while aquiring the mutex.
Therefore the reset offset needs to be retrieved after acquiring the mutex.
Cc: Android Kernel Team <kernel-team@android.com>
Signed-off-by: Bjorn Andersson <bjorn.andersson@sonymobile.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Sometimes free_qos_entry() sometimes frees its argument. I have moved
the dereference of "entry" ahead on line to avoid a use after free.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Commit ac4c1a9b33 ("staging: drm/imx: Add LDB support") added the
DRM_IMX_LDB Kconfig entry. That entry selects OF_VIDEOMODE. But there is
no Kconfig symbol named OF_VIDEOMODE. The select statement for that
symbol is a nop. Drop it.
Signed-off-by: Paul Bolle <pebolle@tiscali.nl>
Acked-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
usb_alphatrack_delete() frees "dev" so we can't use it on that path.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Logging messages end in newlines, not have
them put in the middle of messages.
Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Make the Linux xHCI driver automatically try to switchover the EHCI ports to
xHCI when an Intel xHCI host is detected, and it also finds an Intel EHCI host.
This means we will no longer have to add Intel xHCI hosts to a quirks list when
the PCI device IDs change. Simply continuing to add new Intel xHCI PCI device
IDs to the quirks list is not sustainable.
During suspend ports may be swicthed back to EHCI by BIOS and not properly
restored to xHCI at resume. Previously both EHCI and xHCI resume functions
switched ports back to XHCI, but it's enough to do it in xHCI only
because the hub driver doesn't start running again until after both hosts are resumed.
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Pull alpha architecture fixes from Matt Turner:
"This contains mostly clean ups and fixes but also an implementation of
atomic64_dec_if_positive() and a pair of new syscalls"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mattst88/alpha:
alpha: Use handle_percpu_irq for the timer interrupt
alpha: Force the user-visible HZ to a constant 1024.
alpha: Don't if-out dp264_device_interrupt.
alpha: Use __builtin_alpha_rpcc
alpha: Fix type compatibility warning for marvel_map_irq
alpha: Generate dwarf2 unwind info for various kernel entry points.
alpha: Implement atomic64_dec_if_positive
alpha: Improve atomic_add_unless
alpha: Modernize lib/mpi/longlong.h
alpha: Add kcmp and finit_module syscalls
alpha: locks: remove unused arch_*_relax operations
alpha: kernel: typo issue, using '1' instead of '11'
alpha: kernel: using memcpy() instead of strcpy()
alpha: Convert print_symbol to %pSR
This includes some fixes for vhost net and scsi drivers.
The test module has already been reworked to avoid rcu
usage, but the necessary core changes are missing,
we fixed this.
Unlikely to affect any real-world users, but it's
early in the cycle so, let's merge them.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost
Pull vhost fixes from Michael Tsirkin:
"vhost: more fixes for 3.11
This includes some fixes for vhost net and scsi drivers.
The test module has already been reworked to avoid rcu usage, but the
necessary core changes are missing, we fixed this.
Unlikely to affect any real-world users, but it's early in the cycle
so, let's merge them"
(It was earlier when Michael originally sent the email, but it somehot
got missed in the flood, so here it is after -rc2)
* tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost:
vhost: Remove custom vhost rcu usage
vhost-scsi: Always access vq->private_data under vq mutex
vhost-net: Always access vq->private_data under vq mutex
`do_cmd_ioctl()` is called with the comedi device's mutex locked to
process the `COMEDI_CMD` ioctl to set up comedi's asynchronous command
handling on a comedi subdevice. `comedi_read()` and `comedi_write()`
are the `read` and `write` handlers for the comedi device, but do not
lock the mutex (for performance reasons, as some things can hold the
mutex for quite a long time).
There is a race condition if `comedi_read()` or `comedi_write()` is
running at the same time and for the same file object and comedi
subdevice as `do_cmd_ioctl()`. `do_cmd_ioctl()` sets the subdevice's
`busy` pointer to the file object way before it sets the `SRF_RUNNING` flag
in the subdevice's `runflags` member. `comedi_read() and
`comedi_write()` check the subdevice's `busy` pointer is pointing to the
current file object, then if the `SRF_RUNNING` flag is not set, will call
`do_become_nonbusy()` to shut down the asyncronous command. Bad things
can happen if the asynchronous command is being shutdown and set up at
the same time.
To prevent the race, don't set the `busy` pointer until
after the `SRF_RUNNING` flag has been set. Also, make sure the mutex is
held in `comedi_read()` and `comedi_write()` while calling
`do_become_nonbusy()` in order to avoid moving the race condition to a
point within that function.
Change some error handling `goto cleanup` statements in `do_cmd_ioctl()`
to simple `return -ERRFOO` statements as a result of changing when the
`busy` pointer is set.
Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Comedi devices can do blocking read() or write() (or poll()) if an
asynchronous command has been set up, blocking for data (for read()) or
buffer space (for write()). Various events associated with the
asynchronous command will wake up the blocked reader or writer (or
poller). It is also possible to force the asynchronous command to
terminate by issuing a `COMEDI_CANCEL` ioctl. That shuts down the
asynchronous command, but does not currently wake up the blocked reader
or writer (or poller). If the blocked task could be woken up, it would
see that the command is no longer active and return. The caller of the
`COMEDI_CANCEL` ioctl could attempt to wake up the blocked task by
sending a signal, but that's a nasty workaround.
Change `do_cancel_ioctl()` to wake up the wait queue after it returns
from `do_cancel()`. `do_cancel()` can propagate an error return value
from the low-level comedi driver's cancel routine, but it always shuts
the command down regardless, so `do_cancel_ioctl()` can wake up he wait
queue regardless of the return value from `do_cancel()`.
Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The calculation of the attribute length was 4 bytes off.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Tested-by: Andre Heider <a.heider@gmail.com>
Reported-and-tested-by: Henrik Rydberg <rydberg@euromail.se>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
USB 2.1 devices can go into a lower power link state, L1. When they are
active, they are in the L0 state. The L1 transition can be purely
driven by software, or some USB host controllers (including some xHCI
1.0 hosts) allow the host hardware to track idleness and automatically
place a port into L1.
The USB 2.1 Link Power Management ECN gives a way for USB 2.1 hubs that
support LPM to report that a port is in L1. The port status bit 5 will
be set when the port is in L1. The xHCI host reports the root port as
being in 'U2' when the devices is in L1, and as being in 'U0' when the
port is active (in L0).
Translate the xHCI USB 2.1 link status into the format external hubs
use, and pass the L1 status up to the USB core and tools like lsusb.
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
The hub control function is *way* too long. Refactor it into a new
function, and document the side effects of calling that function.
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Adds power management support to xHCI platform driver.
This patch facilitates the transition of xHCI host controller
between S0 and S3/S4 power states, during suspend/resume cycles.
Signed-off-by: Abhilash Kesavan <a.kesavan@samsung.com>
Signed-off-by: Vikas C Sajjan <vikas.sajjan@linaro.org>
CC: Doug Anderson <dianders@chromium.org>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Johan Hovold