This is a note to let you know that I've just added the patch titled net: lan9303: Fix read error execution path to the 5.10-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: net-lan9303-fix-read-error-execution-path.patch and it can be found in the queue-5.10 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit cd3ad9ad4abbca943897c690f8417da0fbb120ab Author: Jerry Ray <jerry.ray@xxxxxxxxxxxxx> Date: Fri Dec 9 09:35:02 2022 -0600 net: lan9303: Fix read error execution path [ Upstream commit 8964916d206071b058c6351f88b1966bd58cbde0 ] This patch fixes an issue where a read failure of a port statistic counter will return unknown results. While it is highly unlikely the read will ever fail, it is much cleaner to return a zero for the stat count. Fixes: a1292595e006 ("net: dsa: add new DSA switch driver for the SMSC-LAN9303") Signed-off-by: Jerry Ray <jerry.ray@xxxxxxxxxxxxx> Reviewed-by: Vladimir Oltean <olteanv@xxxxxxxxx> Reviewed-by: Florian Fainelli <f.fainelli@xxxxxxxxx> Link: https://lore.kernel.org/r/20221209153502.7429-1-jerry.ray@xxxxxxxxxxxxx Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/drivers/net/dsa/lan9303-core.c b/drivers/net/dsa/lan9303-core.c index c79bb8cf962c..deeed50a42c0 100644 --- a/drivers/net/dsa/lan9303-core.c +++ b/drivers/net/dsa/lan9303-core.c @@ -1002,9 +1002,11 @@ static void lan9303_get_ethtool_stats(struct dsa_switch *ds, int port, ret = lan9303_read_switch_port( chip, port, lan9303_mib[u].offset, ®); - if (ret) + if (ret) { dev_warn(chip->dev, "Reading status port %d reg %u failed\n", port, lan9303_mib[u].offset); + reg = 0; + } data[u] = reg; } }