firmware_loader: use -ETIMEDOUT instead of -EAGAIN in fw_load_sysfs_fallback

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@kernel.org>
Reviewed-by: Shuah Khan <skhan@linuxfoundation.org>
Acked-by: Luis Chamberlain <mcgrof@kernel.org>
Signed-off-by: Anirudh Rayabharam <mail@anirudhrb.com>
Cc: stable <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20210728085107.4141-2-mail@anirudhrb.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/base/firmware_loader/fallback.c b/drivers/base/firmware_loader/fallback.c
index 91899d1..1a48be0 100644 (file)
--- a/drivers/base/firmware_loader/fallback.c
+++ b/drivers/base/firmware_loader/fallback.c
@@ -535,8 +535,6 @@ static int fw_load_sysfs_fallback(struct fw_sysfs *fw_sysfs, long timeout)
        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;