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ath9k: do not return invalid pointers as a *dentry

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When calling debugfs functions, they can now return error values if
something went wrong.  If that happens, return a NULL as a *dentry to
the relay core instead of passing it an illegal pointer.

The relay core should be able to handle an illegal pointer, but add this
check to be safe.

Cc: Kalle Valo <kvalo@codeaurora.org>
Cc: QCA ath9k Development <ath9k-devel@qca.qualcomm.com>
Cc: linux-wireless@vger.kernel.org
Cc: netdev@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
This commit is contained in:
Greg Kroah-Hartman 2019-01-31 14:16:25 +01:00 committed by Kalle Valo
parent 056550291d
commit cd98625b3e
1 changed files with 3 additions and 0 deletions
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3
drivers/net/wireless/ath/ath9k/common-spectral.c
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@ -1039,6 +1039,9 @@ static struct dentry *create_buf_file_handler(const char *filename,
buf_file = debugfs_create_file(filename, mode, parent, buf,
&relay_file_operations);
if (IS_ERR(buf_file))
return NULL;
*is_global = 1;
return buf_file;
}