[PATCH 4.19 25/54] firmware_loader: use -ETIMEDOUT instead of -EAGAIN in fw_load_sysfs_fallback

From: Greg Kroah-Hartman
Date: Tue Aug 10 2021 - 13:32:37 EST

From: Anirudh Rayabharam <mail@xxxxxxxxxxxxx>

commit 0d6434e10b5377a006f6dd995c8fc5e2d82acddc upstream.

The only motivation for using -EAGAIN in commit 0542ad88fbdd81bb
("firmware loader: Fix _request_firmware_load() return val for fw load
abort") was to distinguish the error from -ENOMEM, and so there is no
real reason in keeping it. -EAGAIN is typically used to tell the
userspace to try something again and in this case re-using the sysfs
loading interface cannot be retried when a timeout happens, so the
return value is also bogus.

-ETIMEDOUT is received when the wait times out and returning that
is much more telling of what the reason for the failure was. So, just
propagate that instead of returning -EAGAIN.

Suggested-by: Luis Chamberlain <mcgrof@xxxxxxxxxx>
Reviewed-by: Shuah Khan <skhan@xxxxxxxxxxxxxxxxxxx>
Acked-by: Luis Chamberlain <mcgrof@xxxxxxxxxx>
Signed-off-by: Anirudh Rayabharam <mail@xxxxxxxxxxxxx>
Cc: stable <stable@xxxxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20210728085107.4141-2-mail@xxxxxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
drivers/base/firmware_loader/fallback.c | 2 --
1 file changed, 2 deletions(-)

--- a/drivers/base/firmware_loader/fallback.c
+++ b/drivers/base/firmware_loader/fallback.c
@@ -581,8 +581,6 @@ static int fw_load_sysfs_fallback(struct
if (fw_state_is_aborted(fw_priv)) {
if (retval == -ERESTARTSYS)
retval = -EINTR;
- else
- retval = -EAGAIN;
} else if (fw_priv->is_paged_buf && !fw_priv->data)
retval = -ENOMEM;