platform/x86: dell-ddv: Return error if buffer is empty

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[ Upstream commit 36d44825fa ]

In several cases, the DDV WMI interface can return buffers
with a length of zero. Return -ENODATA in such a case for
proper error handling. Also replace some -EIO errors with
more specialized ones.

Signed-off-by: Armin Wolf <W_Armin@gmx.de>
Link: https://lore.kernel.org/r/20230126194021.381092-3-W_Armin@gmx.de
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Stable-dep-of: 0331b1b0ba ("platform/x86: dell-ddv: Fix temperature scaling")
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Armin Wolf 2023-01-26 20:40:18 +01:00 • committed by Greg Kroah-Hartman

parent d62e03be69

commit cc9d189a39

1 changed files with 12 additions and 5 deletions

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drivers/platform/x86/dell/dell-wmi-ddv.c

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