The use of poll_count is a vestige from long-ago testing, which is no
longer needed. It is removed by this patch.
Signed-off-by: Tim Sell <Timothy.Sell@unisys.com>
Signed-off-by: David Kershner <david.kershner@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Don't need to have a wmb() in visordriver_remove_device. Also removed
an unnecessary check for drv being null.
Signed-off-by: David Kershner <david.kershner@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The channel_bytes attribute in the visor_device struct was meant to keep
track of the number of bytes in the associated channel of the device.
Not only is the variable never set nor used, but the information can
already be accessed by referencing visor_device->visorchannel->nbytes.
Signed-off-by: Alexander Curtin <alexander.curtin@unisys.com>
Signed-off-by: David Kershner <david.kershner@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The 'visor_device.devnodes' field was used for displaying driver version
information through the devmajorminor sysfs attribute, which has recently
been removed, rendering the field unnecessary.
Signed-off-by: Alexander Curtin <alexander.curtin@unisys.com>
Signed-off-by: David Kershner <david.kershner@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The visor_device.type field was included when preparing to remove
the device_info struct. However, it's not used at all, and was already
redundant by the existence of the 'visor_device.channel_type_guid'
field.
Signed-off-by: Alexander Curtin <alexander.curtin@unisys.com>
Signed-off-by: David Kershner <david.kershner@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The 'description' variable in visor_device was added in preparation for
removing the 'device_info' struct when the uislib files were removed.
That attribute is never accessed nor set, and the 'name' attribute
provides enough information to correctly identify the driver, it is not
needed.
Signed-off-by: Alexander Curtin <alexander.curtin@unisys.com>
Signed-off-by: David Kershner <david.kershner@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The fields 'switch_no' and 'internal_port_no' were originally added to the
visor_device struct in preparation of removing the 'device_info' struct
in the now removed 'uislib' library. After the refactoring was complete,
these attributes are not referenced anywhere, and there are no plans to
use them.
Signed-off-by: Alexander Curtin <alexander.curtin@unisys.com>
Signed-off-by: David Kershner <david.kershner@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The argument for ULTRA_CHANNELCLI_STRING is supposed to be
an integer representing the channel state. 'state' is a more
descriptive variable name for this.
Signed-off-by: Alexander Curtin <alexander.curtin@unisys.com>
Signed-off-by: David Kershner <david.kershner@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
In client_bus_info_show, the variable 'x' is used to create keep track
of the offset that the current 'pos' in the output buffer needs to be
incremented by. Since 'off' is already taken 'shift' was used since it's
used to shift the pointer.
Signed-off-by: Alexander Curtin <alexander.curtin@unisys.com>
Signed-off-by: David Kershner <david.kershner@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
In the case of client_bus_info_show, the variable 'p' was used to
indicate the position in the output buffer. This was changed to 'pos' to
indicate that it kept track of the current position in the output
buffer.
Signed-off-by: Alexander Curtin <alexander.curtin@unisys.com>
Signed-off-by: David Kershner <david.kershner@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The variable name "s" doesn't indicate the purpose of the string, which
is to store the id collected from the visorchannel_zoneid function. This
just replaces the name with "zoneid".
Signed-off-by: Alexander Curtin <alexander.curtin@unisys.com>
Signed-off-by: David Kershner <david.kershner@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The variable name "s" doesn't indicate the purpose of the string, which
is to store the id collected from the visorchannel_id function. This
just replaces the name with "typeid".
Signed-off-by: Alexander Curtin <alexander.curtin@unisys.com>
Signed-off-by: David Kershner <david.kershner@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This patch simply removes the double negative comparison for
test_bit since test_bit already preforms this check.
Signed-off-by: Erik Arfvidson <erik.arfvidson@unisys.com>
Signed-off-by: David Kershner <david.kershner@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This patch removes the double negative comparisons for function
readb.
Signed-off-by: Erik Arfvidson <erik.arfvidson@unisys.com>
Signed-off-by: David Kershner <david.kershner@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Away is ambiguous when specifying error vs success. Make return labels
more meaningful by marking them as error paths.
Signed-off-by: David Kershner <david.kershner@unisys.com>
Signed-off-by: Timothy Sell <timothy.sell@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Gotos in visorbus_match are not needed.
Signed-off-by: David Kershner <david.kershner@unisys.com>
Signed-off-by: Timothy Sell <timothy.sell@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This patch fixes the gotos in visorbus_init
Signed-off-by: David Kershner <david.kershner@unisys.com>
Signed-off-by: Timothy Sell <timothy.sell@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The sysfs attribute directory at:
/sys/bus/visorbus/devices/vbus<x>:dev<y>/devmajorminor/*
or
/sys/devices/visorbus<x>/vbus<x>:dev<y>/devmajorminor/*
previously provided a location where a visorbus function driver could
publish information (for usermode use) about possibly-multiple major and
minor device numbers for character devices created for a each visorbus
device, using visorbus_registerdevnode(). This functionality is not
currently used, so it has been removed by this cset.
Signed-off-by: Tim Sell <Timothy.Sell@unisys.com>
Signed-off-by: David Kershner <david.kershner@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Fixup the visordriver_probe function. Rearrange the function to avoid
needing gotos and removed unnecessary wmb().
Signed-off-by: David Kershner <david.kershner@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Don't use the abmiguous cleanup, make it more meaningful.
Signed-off-by: David Kershner <david.kershner@unisys.com>
Signed-off-by: Timothy Sell <timothy.sell@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cleaned up bus_epilogs vague gotos and in the process discovered
some error paths that could unlock a non locked semaphore.
Signed-off-by: David Kershner <david.kershner@unisys.com>
Signed-off-by: Timothy Sell <timothy.sell@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Rename it to what it does instead of the default ambiguous
cleanup.
Signed-off-by: David Kershner <david.kershner@unisys.com>
Signed-off-by: Timothy Sell <timothy.sell@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Change the goto label "cleanup" to something more useful like
out_respond.
Signed-off-by: David Kershner <david.kershner@unisys.com>
Signed-off-by: Timothy Sell <timothy.sell@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Clean up the goto in parser_init_byte_stream and make the goto section
the error case.
Signed-off-by: David Kershner <david.kershner@unisys.com>
Signed-off-by: Timothy Sell <timothy.sell@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Get rid of the gotos in initialize_controlvm_payload_info. The check in
the error path if payload was valid was never called so get rid of that
as well.
Signed-off-by: David Kershner <david.kershner@unisys.com>
Signed-off-by: Timothy Sell <timothy.sell@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
If visorbus has registered yet just reschedule and exit. The rest of
the function doesn't need to reschedule so just move it up to the
initial check.
Signed-off-by: David Kershner <david.kershner@unisys.com>
Signed-off-by: Timothy Sell <timothy.sell@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This patch fixes the checkpatch warning that else is not generally
useful after a break or return.
This was done using Coccinelle:
@@
expression e2;
statement s1;
@@
if(e2) { ... return ...; }
-else
s
Signed-off-by: Bhaktipriya Shridhar <bhaktipriya96@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Goto label was ambiguous change to out_free_page to signify that
we will always go through the path even on success.
Signed-off-by: David Kershner <david.kershner@unisys.com>
Signed-off-by: Timothy Sell <timothy.sell@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Away label is ambiguous change to it err_destroy_channel to make it
clear this is an error path.
Signed-off-by: David Kershner <david.kershner@unisys.com>
Signed-off-by: Timothy Sell <timothy.sell@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This patch fixes the smatch error:
drivers/staging/unisys/visorbus/visorchipset.c:2217 visorchipset_ioctl()
warn: user controlled 'adjustment' cast to postive rl = 's64min-s64max'
This is because we read a s64 and pass it to a function as u64.
Signed-off-by: David Kershner <david.kershner@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Fix build errors by limiting UNISYS_VISORINPUT to the INPUT kconfig
setting.
drivers/built-in.o: In function `visorinput_remove':
visorinput.c:(.text+0x20802e): undefined reference to `input_unregister_device'
drivers/built-in.o: In function `visorinput_probe':
visorinput.c:(.text+0x208177): undefined reference to `input_allocate_device'
visorinput.c:(.text+0x208241): undefined reference to `input_register_device'
visorinput.c:(.text+0x20824d): undefined reference to `input_free_device'
visorinput.c:(.text+0x208286): undefined reference to `input_allocate_device'
visorinput.c:(.text+0x208302): undefined reference to `input_set_abs_params'
visorinput.c:(.text+0x20831a): undefined reference to `input_set_abs_params'
visorinput.c:(.text+0x20833f): undefined reference to `input_register_device'
visorinput.c:(.text+0x20834b): undefined reference to `input_free_device'
visorinput.c:(.text+0x20835f): undefined reference to `input_set_capability'
drivers/built-in.o: In function `visorinput_channel_interrupt':
visorinput.c:(.text+0x20851e): undefined reference to `input_event'
visorinput.c:(.text+0x20862c): undefined reference to `input_event'
drivers/built-in.o: In function `input_report_key':
visorinput.c:(.text+0x207fd1): undefined reference to `input_event'
drivers/built-in.o: In function `input_sync':
visorinput.c:(.text+0x207fdc): undefined reference to `input_event'
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This patch saves off the create_bus and create_device controlvm messages
for the visorhba device, so that they can be resurrected and used in the
kdump kernel.
After this patch, a crash dump can be generated using:
# service kdump start
# echo 1 > /proc/sys/kernel/sysrq
# echo c > /proc/sysrq-trigger
Signed-off-by: Timothy Sell <timothy.sell@unisys.com>
Signed-off-by: David Kershner <david.kershner@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Use the dynamic size of the controlvm channel (struct channel_header.size)
instead of the statically computed sizeof(struct controlvm_channel) when
determining the valid bounds for visorchannel_read() and
visorchannel_write().
This prevents an observed problem where kdump was failing because
controlvm_channel.local_crash_msg_offset was pointing beyond the statically
computed size of the channel, even though the channel was physically large
enough. This was causing visorchannel_read() to unecessarily fail, because
we thought we were attempting to access memory outside of the channel.
Signed-off-by: Timothy Sell <timothy.sell@unisys.com>
Signed-off-by: David Kershner <david.kershner@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Previously if controlvm message payloads (indicated in controlvm message
via struct controlvm_message.hdr.payload_vm_offset) were contained within
the bounds of the channel memory, we would fail to process any controlvm
message that contained payload data. Reason is, the request_mem_region()
would fail, because it overlapped the channel memory. Since
request_mem_region() doesn't actually serve a functional purpose anyway,
this was simply removed.
Signed-off-by: Timothy Sell <timothy.sell@unisys.com>
Signed-off-by: David Kershner <david.kershner@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Benjamin Romer is no longer a maintainer for the s-Par drivers. David
Kershner will now be the maintainer.
Signed-off-by: David Kershner <david.kershner@unisys.com>
Signed-off-by: Benjamin Romer <benjamin.romer@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
With concurrency managed workqueues, use of dedicated workqueues
can be replaced by using system_wq.
Drop visornic_timeout_reset_workqueue by using system_wq.
Since there is only one work item per devdata and different
devdatas do not need to be ordered, increase of concurrency
level by switching to system_wq should not break anything.
cancel_work_sync() is used to ensure that work is not pending or
executing on any CPU.
Signed-off-by: Amitoj Kaur Chawla <amitoj1606@gmail.com>
Acked-by: Tejun Heo <tj@kernel.org>
Tested-by: David Kershner <david.kershner@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
With concurrency managed workqueues, use of dedicated workqueues
can be replaced by using system_wq. Drop periodic_controlvm_workqueue
by using system_wq.
Since there is only one work item periodic_controlvm_work and
different periodic_controlvm_works do not need to be ordered, increase
of concurrency level by switching to system_wq should not break anything.
cancel_delayed_work_sync() is used to ensure that work is not pending
or executing on any CPU.
Signed-off-by: Amitoj Kaur Chawla <amitoj1606@gmail.com>
Acked-by: Tejun Heo <tj@kernel.org>
Tested-by: David Kershner <david.kershner@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This patch removes unnecessary return variables and compresses the
return logic.
The coccinelle script that finds and fixes this issue is:
@@ type T; identifier i,f; constant C; @@
- T i;
...when != i
when strict
( return -C;
|
- i =
+ return
f(...);
- return i;
)
Signed-off-by: Bhaktipriya Shridhar <bhaktipriya96@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Unnecessary dev_set_drvdata() has been removed since the driver
core clears the driver data to NULL after device release or on
probe failure. There is no need to manually clear the device
driver data to NULL.
The Coccinelle semantic patch used to make this change is as follows:
//<smpl>
@@
struct device *dev;
@@
- dev_set_drvdata(dev, NULL);
//</smpl>
Signed-off-by: Amitoj Kaur Chawla <amitoj1606@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The pfn field in the channel is 64 bits, the parameter being passed
should be 64 bits as well.
Signed-off-by: David Kershner <david.kershner@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Smatch complained about inconsistent indenting. This patch addresses it.
Signed-off-by: David Kershner <david.kershner@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The other error paths return meaningful error codes, except for the one
when registering a device, which just returned -1. Let's return ENODEV
when it fails to register instead.
Signed-off-by: Benjamin Romer <benjamin.romer@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Simplify this function by removing the goto in favor of handling errors
immediately. Eliminate the vaguely-named variable x, and remove the
unneeded initialization of rc. Lastly, provide meaningful error values
to the callback function instead of just passing back a -1 for failure.
Signed-off-by: Benjamin Romer <benjamin.romer@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The value of rc is set by calling a function, so there's no need to
initialize it to -1, or anything at all.
Signed-off-by: Benjamin Romer <benjamin.romer@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Remove the unnecessary rc and goto messiness, and just handle freeing
the memory before returning an error in the one place where that needs
to happen.
Signed-off-by: Benjamin Romer <benjamin.romer@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Get rid of the rc = -1 initialization. Return a meaningful error on
failure in the function, or, the rc from a called function if it fails.
Signed-off-by: Benjamin Romer <benjamin.romer@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Remove the rc, the = -1, and all the goto mess here and just return
directly with a meaningful error number.
The caller only cares about success/failure right now, that needs to be
addressed in a later patch series.
Signed-off-by: Benjamin Romer <benjamin.romer@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Instead of returning -1, return -ENODEV when there is no probe function
found for the device.
Signed-off-by: Benjamin Romer <benjamin.romer@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Boolean variables should be assigned true/false rather than 1/0.
This patch makes a correction on such a variable which has boolean
values assigned in all other places within the file.
Signed-off-by: Janani Ravichandran <janani.rvchndrn@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Tim Sell