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visorbus: fix error return code in visorchipset_init()

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[ Upstream commit ce52ec5beecc1079c251f60e3973b3758f60eb59 ]

Commit 1366a3db3d ("staging: unisys: visorbus: visorchipset_init clean
up gotos") assigns the initial value -ENODEV to the local variable 'err',
and the first several error branches will return this value after "goto
error". But commit f1f537c2e7 ("staging: unisys: visorbus: Consolidate
controlvm channel creation.") overwrites 'err' in the middle of the way.
As a result, some error branches do not successfully return the initial
value -ENODEV of 'err', but return 0.

In addition, when kzalloc() fails, -ENOMEM should be returned instead of
-ENODEV.

Fixes: f1f537c2e7 ("staging: unisys: visorbus: Consolidate controlvm channel creation.")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com>
Link: https://lore.kernel.org/r/20210528082614.9337-1-thunder.leizhen@huawei.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Zhen Lei 2021-05-28 16:26:14 +08:00 committed by Greg Kroah-Hartman
parent e5a3a3108f
commit bd95a3e159
1 changed files with 4 additions and 2 deletions
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6
drivers/visorbus/visorchipset.c
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@ -1561,7 +1561,7 @@ static void controlvm_periodic_work(struct work_struct *work)
static int visorchipset_init(struct acpi_device *acpi_device)
{
int err = -ENODEV;
int err = -ENOMEM;
struct visorchannel *controlvm_channel;
chipset_dev = kzalloc(sizeof(*chipset_dev), GFP_KERNEL);
@ -1584,8 +1584,10 @@ static int visorchipset_init(struct acpi_device *acpi_device)
"controlvm",
sizeof(struct visor_controlvm_channel),
VISOR_CONTROLVM_CHANNEL_VERSIONID,
VISOR_CHANNEL_SIGNATURE))
VISOR_CHANNEL_SIGNATURE)) {
err = -ENODEV;
goto error_delete_groups;
}
/* if booting in a crash kernel */
if (is_kdump_kernel())
INIT_DELAYED_WORK(&chipset_dev->periodic_controlvm_work,