wifi: rtlwifi: fix incorrect error codes in rtl_debugfs_set_write_rfreg()

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[ Upstream commit 905a9241e4 ]

If there is a failure during copy_from_user or user-provided data buffer
is invalid, rtl_debugfs_set_write_rfreg should return negative error code
instead of a positive value count.

Fix this bug by returning correct error code. Moreover, the check of buffer
against null is removed since it will be handled by copy_from_user.

Fixes: 610247f46f ("rtlwifi: Improve debugging by using debugfs")
Signed-off-by: Wei Chen <harperchen1110@gmail.com>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20230326053138.91338-1-harperchen1110@gmail.com
Signed-off-by: Sasha Levin <sashal@kernel.org>

...

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Wei Chen 2023-03-26 05:31:38 +00:00 • committed by Greg Kroah-Hartman

parent 7f6714fc2a

commit 4eb666646c

1 changed files with 3 additions and 3 deletions

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drivers/net/wireless/realtek/rtlwifi/debug.c

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