1271 Commits

Author SHA1 Message Date
David Kershner
d02bde9d37 staging: unisys: visorbus: update comment
Comment was outdated and did not reflect what was actually happening.
Update the comment to reflect reality.

Signed-off-by: David Kershner <david.kershner@unisys.com>
Reviewed-by: Tim Sell <timothy.sell@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-04-28 11:49:52 +02:00
David Kershner
027b03e717 staging: unisys: visorbus: fixed indentation
Moved the brace to the left to fix the indentation issue.

Signed-off-by: David Kershner <david.kershner@unisys.com>
Reviewed-by: Tim Sell <timothy.sell@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-04-28 11:49:52 +02:00
David Kershner
c1d28da7a2 staging; unisys: visorbus: replace uint32 with int
Shouldn't use uint32 in the kernel, it can be replaced with int here.

Signed-off-by: David Kershner <david.kershner@unisys.com>
Reviewed-by: Tim Sell <timothy.sell@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-04-28 11:49:52 +02:00
David Kershner
54149b4c14 staging: unisys: visornic: remove keyword inline from function
Functions in c files don't need to be inlined, get rid of the keyword.

Signed-off-by: David Kershner <david.kershner@unisys.com>
Reviewed-by: Tim Sell <timothy.sell@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-04-28 11:49:51 +02:00
David Kershner
4c0e65f83a staging: unisys: visorbus: combine response functions into a single one
There are several different controlvm response functions, consolidate them
to one so we can simplify error handling.

Signed-off-by: David Kershner <david.kershner@unisys.com>
Reviewed-by: Tim Sell <timothy.sell@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-04-28 11:49:51 +02:00
David Kershner
b0512faf60 staging: unisys: visorbus: fix kernel BUG discovered by day0 testing
Kernel day0 testing robot reported a kernel BUG at drivers/base/driver.c!
with the following call stack:

[   14.963563] ------------[ cut here ]------------
[   14.967298] kernel BUG at drivers/base/driver.c:153!
[   14.970948] invalid opcode: 0000 [#1] SMP
[   14.974013] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.11.0-rc4-00790-g0789e2c #1
[   14.978221] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.9.3-20161025_171302-gandalf 04/01/2014
[   14.983417] task: ffff88001ea46040 task.stack: ffffc90000008000
[   14.987315] RIP: 0010:driver_register+0xa1/0xd0
[   14.990044] RSP: 0000:ffffc9000000be60 EFLAGS: 00010246
[   14.993039] RAX: 0000000000000000 RBX: ffffffff831d4c20 RCX: 0000000000000000
[   14.997040] RDX: 000000000000004d RSI: ffffffff831d47c0 RDI: ffffffff831d4c20
[   15.001511] RBP: ffffc9000000be78 R08: ffffc9000000be78 R09: ffffc9000000be7c
[   15.006163] R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000
[   15.010068] R13: 00000000ffffffff R14: ffffffff832f3923 R15: 0000000000000000
[   15.013715] FS:  0000000000000000(0000) GS:ffff88001fa00000(0000) knlGS:0000000000000000
[   15.017460] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   15.021268] CR2: 0000000000000000 CR3: 0000000003009000 CR4: 00000000000006b0
[   15.025633] Call Trace:
[   15.028069]  ? visorbus_register_visor_driver+0x3f/0x60
[   15.031065]  ? init_unisys+0x3a/0x90
[   15.033562]  ? device_resume_response+0x50/0x50
[   15.036083]  visorinput_init+0x10/0x20
[   15.038937]  do_one_initcall+0x9a/0x164
[   15.041838]  ? set_debug_rodata+0x12/0x12
[   15.045333]  kernel_init_freeable+0x11e/0x1a1
[   15.048369]  ? rest_init+0x80/0x80
[   15.050813]  kernel_init+0x9/0x100
[   15.053353]  ret_from_fork+0x2c/0x40
[   15.056009] Code: ff 85 c0 41 89 c4 75 13 48 8b 7b 70 31 f6 e8 97 16 be ff 44 89 e0 5b 41 5c 5d c3 48 89 df e8 57 e1 ff ff 44 89 e0 5b 41 5c 5d c3 <0f> 0b 48 8b 33 48 c7 c7 a0 dd d5 82 e8 ec f0 6f ff 48 8b 73 08
[   15.065144] RIP: driver_register+0xa1/0xd0 RSP: ffffc9000000be60
[   15.068360] ---[ end trace 7d13369c38d80a8f ]---

This bug will occur if the visorbus driver is built-in to the kernel, and
the resulting kernel is run in an environment where visorbus devices are
NOT supported, and an attempt is made to load any of the drivers: visorhba,
visornic, or visorinput.

Checked to see if we have called bus_register, if not do not call
driver_register.

Signed-off-by: David Kershner <david.kershner@unisys.com>
Fixes: 5b6f9b95f7ae ("staging: unisys: visorbus: get rid of create_bus_type.")
Reviewed-by: Tim Sell <timothy.sell@unisys.com>
Reviewed-by: David Binder <david.binder@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-04-08 12:49:36 +02:00
Thomas Jespersen
bca74ee5fe staging: unisys: visornic: Replace symbolic perms with octal
Replace symbolic permissions S_IRUSR and S_IWUSR for their octal
counterparts

Signed-off-by: Thomas Jespersen <laumann.thomas@gmail.com>
Acked-by: David Kershner <david.kershner@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-04-08 12:49:36 +02:00
David Kershner
bd801a0729 staging: unisys: visorbus: Have unisys_vmcall return Linux error instead of VMCALL error
The function unisys_vmcall was returning VMCALL specific errors and the
calling code was ignoring which error was actually returned. Instead we
should be mapping the VMCALL error into a proper Linux error and then
returning that, since we now have an error we know what to do with, we
don't have to drop it but we can send it up the stack.

Signed-off-by: David Kershner <david.kershner@unisys.com>
Reviewed-by: Reviewed-by: Tim Sell <timothy.sell@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-03-29 09:17:04 +02:00
David Kershner
88845f407c staging: unisys: visorbus: move unisys_vmcall into visorchipset
The only one using unisys_vmcall was visorchipset.c, it can be moved into
the visorchipset file directly instead of being in a header file.

Signed-off-by: David Kershner <david.kershner@unisys.com>
Reviewed-by: Reviewed-by: Tim Sell <timothy.sell@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-03-29 09:17:04 +02:00
David Kershner
fd1040997b staging: unisys: visorbus: Update vmcallinterface comment
The comment at the beginning of the vmcallinterface.h file references IO
Virtualization. It should be more specific that it is referencing s-Par
Virtualization.

Signed-off-by: David Kershner <david.kershner@unisys.com>
Reviewed-by: Reviewed-by: Tim Sell <timothy.sell@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-03-29 09:17:04 +02:00
David Kershner
40b3e1ac05 staging: unisys: visorbus: get rid of ISSUE_IO_VMCALL
The macro ISSUE_IO_VMCALL was a wrapper around the function unisys_vmcall.
It doesn't need to exist and was just being noisy, so get rid of it.

Signed-off-by: David Kershner <david.kershner@unisys.com>
Reviewed-by: Reviewed-by: Tim Sell <timothy.sell@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-03-29 09:17:03 +02:00
David Kershner
c9808ff186 staging: unisys: visorbus: remove useless ifdef
We shouldn't be checking if VMCALL_CONTROLVM_ADDR is defined, remove it.

Signed-off-by: David Kershner <david.kershner@unisys.com>
Reviewed-by: Reviewed-by: Tim Sell <timothy.sell@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-03-29 09:17:03 +02:00
David Kershner
51646f4d4b staging: unisys: visorbus: consolidate if statements
We had several if statements inside of if statements that should be
consolidated into an if statement with an && to clean up the code some
more.

Signed-off-by: David Kershner <david.kershner@unisys.com>
Reviewed-by: Reviewed-by: Tim Sell <timothy.sell@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-03-29 09:17:03 +02:00
David Kershner
493d1597dd staging: unisys: visorbus: get rid of braces around single statements
Remove braces around single line if statements, they are not needed.

Signed-off-by: David Kershner <david.kershner@unisys.com>
Reviewed-by: Reviewed-by: Tim Sell <timothy.sell@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-03-29 09:17:03 +02:00
David Kershner
b4a8e6ae17 staging: unisys: visorbus: add error handling to chipset_device_pause/resume
If there is an error in chipset_device_pause/resume don't try to respond,
error out and let the calling functions respond to this error just like
any other error they encounter.

Signed-off-by: David Kershner <david.kershner@unisys.com>
Reviewed-by: Reviewed-by: Tim Sell <timothy.sell@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-03-29 09:17:03 +02:00
David Kershner
15d9ce9d37 staging: unisys: visorbus: add error handling to initiate_chipset_device_pause_resume
Clean up the function to remove some if statments that should be done
in the calling function.

Signed-off-by: David Kershner <david.kershner@unisys.com>
Reviewed-by: Reviewed-by: Tim Sell <timothy.sell@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-03-29 09:17:03 +02:00
David Kershner
293deb2c0c staging: unisys: visorbus: don't unregister if we failed to register
If we fail to register the visordriver, don't call unregister, just
return with the error.

Signed-off-by: David Kershner <david.kershner@unisys.com>
Reviewed-by: Reviewed-by: Tim Sell <timothy.sell@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-03-29 09:17:03 +02:00
David Kershner
711c67f4ec staging: unisys: visorbus: don't ignore visorchannel_read error
Don't override the visorchannel_read_error, just return the
error that it generates.

Signed-off-by: David Kershner <david.kershner@unisys.com>
Reviewed-by: Reviewed-by: Tim Sell <timothy.sell@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-03-29 09:17:03 +02:00
David Kershner
e0d210ae5f staging: unisys: visorbus: check for err from dev_set_name
The function dev_set_name can return an error, don't just ignore it.

Signed-off-by: David Kershner <david.kershner@unisys.com>
Reviewed-by: Reviewed-by: Tim Sell <timothy.sell@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-03-29 09:17:03 +02:00
David Kershner
f894c88a24 staging: unisys: visorbus: cleanup error handling in visorbus_uevent
The add_uevent_var returns an error. Don't overwrite the error with
-ENOMEM, just pass the error code back up.

Signed-off-by: David Kershner <david.kershner@unisys.com>
Reviewed-by: Reviewed-by: Tim Sell <timothy.sell@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-03-29 09:17:03 +02:00
David Kershner
15928a5569 staging: unisys: visorbus: get rid of unused parameter forcenomatch
The forcenomatch parameter was not being used, so get rid of it.

Signed-off-by: David Kershner <david.kershner@unisys.com>
Reviewed-by: Reviewed-by: Tim Sell <timothy.sell@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-03-29 09:17:03 +02:00
David Kershner
377ab0017d staging: unisys: visorbus: get rid of unused parameter forcematch
The forcematch parameter was not being used, so get rid of it.

Signed-off-by: David Kershner <david.kershner@unisys.com>
Reviewed-by: Reviewed-by: Tim Sell <timothy.sell@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-03-29 09:17:03 +02:00
David Kershner
5b6f9b95f7 staging: unisys: visorbus: get rid of create_bus_type.
Create bus_type was just calling register_bustype. Since we control how
many times we call create_bus_type it was extraneous keeping a counter if
the bus was already registered, so the functions were no longer needed.

Signed-off-by: David Kershner <david.kershner@unisys.com>
Reviewed-by: Reviewed-by: Tim Sell <timothy.sell@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-03-29 09:17:03 +02:00
David Kershner
362f87f312 staging: unisys: visorbus: fix error handling in create_bus_instance
The function get_vbus_header_info returns errors that were being handled
incorrectly. Fix the error handling in create_bus_instance.

Signed-off-by: David Kershner <david.kershner@unisys.com>
Reviewed-by: Reviewed-by: Tim Sell <timothy.sell@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-03-29 09:17:03 +02:00
David Kershner
5dca9b2944 staging: unisys: visorbus: add error handling visorbus_enable_channel_interrupt
Add error handling to visorbus_enable_channel_interrupt.

Signed-off-by: David Kershner <david.kershner@unisys.com>
Reviewed-by: Reviewed-by: Tim Sell <timothy.sell@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-03-29 09:17:03 +02:00
David Kershner
b90194d9bb staging: unisys: visorbus: add error handling for dev_start_periodic_work
Report errors if we have a problem in dev_start_periodic_work.

Signed-off-by: David Kershner <david.kershner@unisys.com>
Reviewed-by: Reviewed-by: Tim Sell <timothy.sell@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-03-29 09:17:03 +02:00
David Kershner
3659955a64 staging: unisys: remove client from spar_check_channel
We only have one version of spar_check_channel, get rid of the client
at the end and help save space.

Signed-off-by: David Kershner <david.kershner@unisys.com>
Reviewed-by: Reviewed-by: Tim Sell <timothy.sell@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-03-29 09:17:03 +02:00
David Kershner
3a6b850670 staging: unisys: visorbus: get rid of shouting SPAR_VBUS_CHANNEL_CLIENT_OK macro
The macro SPAR_VBUS_CHANNEL_CLIENT_OK was noisy and only used in one place
so get rid of it.

Signed-off-by: David Kershner <david.kershner@unisys.com>
Reviewed-by: Reviewed-by: Tim Sell <timothy.sell@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-03-29 09:17:03 +02:00
David Kershner
738561a803 staging: unisys: visorbus: move vbuschannel_print_devinfo from .h to .c file
Move vbuschannel_print_devinfo from vbuchannel.h to visorbus_main.c since
it is only referenced in visorbus_main.c. Since it is in a .c file, get
rid of the inline for it.

Signed-off-by: David Kershner <david.kershner@unisys.com>
Reviewed-by: Reviewed-by: Tim Sell <timothy.sell@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-03-29 09:17:03 +02:00
David Kershner
4fb2539c8c staging: unisys: visorbus: consolidate bus_responder and device_responder
With all the code churn, bus_responder and device_responder have become
identical, consolidate them to the same function.

Signed-off-by: David Kershner <david.kershner@unisys.com>
Reviewed-by: Reviewed-by: Tim Sell <timothy.sell@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-03-29 09:17:03 +02:00
David Kershner
3f49a21dec staging: unisys: visorbus: add error handling for chipset_device_create
Adds error handling to the chipset_device_create message. If it returns
a failure, it is assumed it has not signaled the s-Par firmware of the
failure and the caller must do that.

Signed-off-by: David Kershner <david.kershner@unisys.com>
Reviewed-by: Reviewed-by: Tim Sell <timothy.sell@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-03-29 09:17:03 +02:00
David Kershner
0315657116 staging: unisys: visornic: add error handling for visorchannel_signalinsert/remove
Since signalinsert/remove now return valid error codes, we need to check
them when we call them in visornic. The error codes need to propagate out
to the calling functions.

Signed-off-by: David Kershner <david.kershner@unisys.com>
Reviewed-by: Reviewed-by: Tim Sell <timothy.sell@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-03-29 09:17:02 +02:00
Sameer Wadgaonkar
2833399edb staging: unisys: visorbus: add __packed to structures in controlvmchannel.h
Added the __packed keyword to all structures in controlvmchannel.h
to ensure alignment and size in memory.

Signed-off-by: Sameer Wadgaonkar <sameer.wadgaonkar@unisys.com>
Signed-off-by: David Kershner <david.kershner@unisys.com>
Reviewed-by: Reviewed-by: Tim Sell <timothy.sell@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-03-29 09:17:02 +02:00
David Kershner
621f5e1852 staging: unisys: visorbus: add error handling to chipset_bus_create
The function chipset_bus_create should return an error. If an error
is returned, it is assumed the response has not been sent by bus_create.

Correctly handle when the error has been returned in visorchipset.

Signed-off-by: David Kershner <david.kershner@unisys.com>
Reviewed-by: Reviewed-by: Tim Sell <timothy.sell@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-03-29 09:17:02 +02:00
David Kershner
e030d39d58 staging: unisys: visorbus: remaining_steps convert ret to err
The ret variable was only returning an error, so changing it to err to
be more consistent across the file.

Signed-off-by: David Kershner <david.kershner@unisys.com>
Reviewed-by: Reviewed-by: Tim Sell <timothy.sell@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-03-29 09:17:02 +02:00
David Kershner
08a55d2d26 staging: unisys: visorbus: textid_store convert ret to err
The ret variable was only returning an error, so changing it to err to
be more consistent across the file.

Signed-off-by: David Kershner <david.kershner@unisys.com>
Reviewed-by: Reviewed-by: Tim Sell <timothy.sell@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-03-29 09:17:02 +02:00
David Kershner
ea295857fc staging: unisys: visorbus: error_store convert ret to err
The ret variable was only returning an error, so changing it to err to
be more consistent across the file.

Signed-off-by: David Kershner <david.kershner@unisys.com>
Reviewed-by: Reviewed-by: Tim Sell <timothy.sell@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-03-29 09:17:02 +02:00
David Kershner
b309266ed4 staging: unisys: visorbus: boottotool convert ret to err
The ret variable was only returning an error, so changing it to err to
be more consistent across the file.

Signed-off-by: David Kershner <david.kershner@unisys.com>
Reviewed-by: Reviewed-by: Tim Sell <timothy.sell@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-03-29 09:17:02 +02:00
David Kershner
dc35cdf318 staging: unisys: visorbus: convert ret to err to be consistent
The ret variable was only returning an error, so changing it to err to
be more consistent across the file.

Signed-off-by: David Kershner <david.kershner@unisys.com>
Reviewed-by: Reviewed-by: Tim Sell <timothy.sell@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-03-29 09:17:02 +02:00
David Kershner
d337822efb staging: unisys: visorbus: remove invalid comment, we are one driver.
Removed a comment that was describing the relationship between the
visorchipset driver and the visorbus driver. Since they are now one
driver the comment no longer makes sense.

Signed-off-by: David Kershner <david.kershner@unisys.com>
Reviewed-by: Reviewed-by: Tim Sell <timothy.sell@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-03-29 09:17:02 +02:00
David Kershner
b5577d79e2 staging: unisys: visorbus: move bus_device_info_init to visorbus_main.c
The function bus_device_info_init was defined in visorbus_private.h. The
only file that uses it is visorbus_main.c so move the function into the .c
file instead.

Signed-off-by: David Kershner <david.kershner@unisys.com>
Reviewed-by: Reviewed-by: Tim Sell <timothy.sell@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-03-29 09:17:02 +02:00
David Kershner
c53578bd6c staging: unisys: visorbus: add error handling to remaining_steps_show
Don't just drop the error from visorchannel_read on the floor, report it.

Signed-off-by: David Kershner <david.kershner@unisys.com>
Reviewed-by: Reviewed-by: Tim Sell <timothy.sell@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-03-29 09:17:02 +02:00
David Kershner
0d40643672 staging: unisys: visorbus: add error handling textid_show
Don't just drop the error from visorchannel_read on the floor, report it.

Signed-off-by: David Kershner <david.kershner@unisys.com>
Reviewed-by: Reviewed-by: Tim Sell <timothy.sell@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-03-29 09:17:02 +02:00
David Kershner
d9857c794e staging: unisys: visorbus: add error handling to error_show
Don't just drop the error from visorchannel_read on the floor, report it.

Signed-off-by: David Kershner <david.kershner@unisys.com>
Reviewed-by: Reviewed-by: Tim Sell <timothy.sell@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-03-29 09:17:02 +02:00
David Kershner
0b01c6ce5a staging: unisys: visorbus: add error handling to boottotool_show
Don't just drop the error from visorchannel_read on the floor, report it.

Signed-off-by: David Kershner <david.kershner@unisys.com>
Reviewed-by: Reviewed-by: Tim Sell <timothy.sell@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-03-29 09:17:02 +02:00
David Kershner
002a5abb23 staging: unisys: visorbus: add error handling to toolaction_show
Don't just drop the error from visorchannel_read on the floor, report it.

Signed-off-by: David Kershner <david.kershner@unisys.com>
Reviewed-by: Reviewed-by: Tim Sell <timothy.sell@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-03-29 09:17:02 +02:00
David Kershner
deeeca6db2 staging: unisys: visorbus: add error handling around kobject_uevent
The function kobject_uevent_env can return an error, pass that error
to the caller so it can be handled correctly.

Signed-off-by: David Kershner <david.kershner@unisys.com>
Reviewed-by: Reviewed-by: Tim Sell <timothy.sell@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-03-29 09:17:02 +02:00
David Kershner
ae0fa822d7 staging: unisys: visorbus: add error handling for parahotplug_request_kickoff
The function kobject_uevent_env returns an error we shouldn't just drop it
on the floor but we should report it back to the caller. Since it now
returns an error, need to add proper error handling to
parahotplug_process_message.

Signed-off-by: David Kershner <david.kershner@unisys.com>
Reviewed-by: Reviewed-by: Tim Sell <timothy.sell@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-03-29 09:17:02 +02:00
David Kershner
fbc1023afb staging: unisys: visorbus: add error handling to controlvm_periodic_work
The function controlvm_periodic_work should handle errors appropriately.

Signed-off-by: David Kershner <david.kershner@unisys.com>
Reviewed-by: Reviewed-by: Tim Sell <timothy.sell@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-03-29 09:17:02 +02:00
David Kershner
25a5128e8c staging: unisys: visorbus: add error handling to handle_command
Add error handling to the function handle_command.

Since handle_command now returns errors, we need to process them correctly
in process_controlvm_event.

Note: It is invalid to have a controlvm test message in the event queue, so
return -EINVAL if one is discovered.

Signed-off-by: David Kershner <david.kershner@unisys.com>
Reviewed-by: Reviewed-by: Tim Sell <timothy.sell@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-03-29 09:17:02 +02:00