Yi Yang b011946d03 xtensa/simdisk: fix proc_read_simdisk()
The commit a69755b18774 ("xtensa simdisk: switch to proc_create_data()")
split read operation into two parts, first retrieving the path when it's
non-null and second retrieving the trailing '\n'. However when the path
is non-null the first simple_read_from_buffer updates ppos, and the
second simple_read_from_buffer returns 0 if ppos is greater than 1 (i.e.
almost always). As a result reading from that proc file is almost always
empty.

Fix it by making a temporary copy of the path with the trailing '\n' and
using simple_read_from_buffer on that copy.

Cc: stable@vger.kernel.org
Fixes: a69755b18774 ("xtensa simdisk: switch to proc_create_data()")
Signed-off-by: Yi Yang <yiyang13@huawei.com>
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2022-05-11 02:15:38 -07:00
2022-03-31 11:59:03 -07:00
2022-03-26 12:01:35 -07:00
2022-04-30 10:24:21 -07:00
2022-05-01 11:49:32 -07:00
2022-03-31 11:59:03 -07:00
2022-03-31 11:59:03 -07:00
2022-05-01 13:57:58 -07:00

Linux kernel
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