wifi: rtlwifi: fix error codes in rtl_debugfs_set_write_h2c()

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[ Upstream commit b88d28146c ]

If the copy_from_user() fails or the user gives invalid date then the
correct thing to do is to return a negative error code.  (Currently it
returns success).

I made a copy additional related cleanups:
1) There is no need to check "buffer" for NULL.  That's handled by
copy_from_user().
2) The "h2c_len" variable cannot be negative because it is unsigned
and because sscanf() does not return negative error codes.

Fixes: 610247f46f ("rtlwifi: Improve debugging by using debugfs")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/YoOLnDkHgVltyXK7@kili
Signed-off-by: Sasha Levin <sashal@kernel.org>

...

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Dan Carpenter 2022-05-17 14:48:44 +03:00 • committed by Greg Kroah-Hartman

parent df59b91dd8

commit 72efb32be1

1 changed files with 4 additions and 4 deletions

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

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