[PATCH RFC 12/38] wifi: libipw: don't return 0 from writes to debug_level

[Christian Brauner]

debug_level_proc_write() returns the length of the string it parsed. A
write that starts with a NUL byte thus returns 0 and writers that use
stdio retry it forever. Return the number of bytes that were written
instead, which also stops writes longer than the 11 bytes it looks at
from coming up short.

Fixes: b453872c35cf ("[NET] ieee80211 subsystem")
Signed-off-by: Christian Brauner (Amutable) <brauner@xxxxxxxxxx>
---
 drivers/net/wireless/intel/ipw2x00/libipw_module.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/wireless/intel/ipw2x00/libipw_module.c b/drivers/net/wireless/intel/ipw2x00/libipw_module.c
index 22358b2c2ecd..552c8ff3928b 100644
--- a/drivers/net/wireless/intel/ipw2x00/libipw_module.c
+++ b/drivers/net/wireless/intel/ipw2x00/libipw_module.c
@@ -236,7 +236,7 @@ static ssize_t debug_level_proc_write(struct file *file,
 	else
 		libipw_debug_level = val;
 
-	return strnlen(buf, len);
+	return count;
 }
 
 static const struct proc_ops debug_level_proc_ops = {

-- 
2.53.0