linux-kernel - [PATCH v8 1/2] firmware_loader: use -ETIMEDOUT instead of -EAGAIN in fw_load_sysfs

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Date:   Wed, 28 Jul 2021 14:21:06 +0530
From:   Anirudh Rayabharam <mail@...rudhrb.com>
To:     mcgrof@...nel.org, gregkh@...uxfoundation.org, rafael@...nel.org,
        skhan@...uxfoundation.org
Cc:     Anirudh Rayabharam <mail@...rudhrb.com>,
        linux-kernel@...r.kernel.org,
        linux-kernel-mentees@...ts.linuxfoundation.org
Subject: [PATCH v8 1/2] 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@...nel.org>
Reviewed-by: Shuah Khan <skhan@...uxfoundation.org>
Acked-by: Luis Chamberlain <mcgrof@...nel.org>
Signed-off-by: Anirudh Rayabharam <mail@...rudhrb.com>
---
 drivers/base/firmware_loader/fallback.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/drivers/base/firmware_loader/fallback.c b/drivers/base/firmware_loader/fallback.c
index 91899d185e31..1a48be0a030e 100644
--- 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;
 
-- 
2.26.2