linux-kernel - [PATCH AUTOSEL 4.19 07/21] usb: typec: tipd: Remove WARN_ON in tps6598x_block

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Message-Id: <20211109222311.1235686-7-sashal@kernel.org>
Date:   Tue,  9 Nov 2021 17:22:56 -0500
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Sven Peter <sven@...npeter.dev>,
        Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Sasha Levin <sashal@...nel.org>, linux-usb@...r.kernel.org
Subject: [PATCH AUTOSEL 4.19 07/21] usb: typec: tipd: Remove WARN_ON in tps6598x_block_read

From: Sven Peter <sven@...npeter.dev>

[ Upstream commit b7a0a63f3fed57d413bb857de164ea9c3984bc4e ]

Calling tps6598x_block_read with a higher than allowed len can be
handled by just returning an error. There's no need to crash systems
with panic-on-warn enabled.

Reviewed-by: Heikki Krogerus <heikki.krogerus@...ux.intel.com>
Signed-off-by: Sven Peter <sven@...npeter.dev>
Link: https://lore.kernel.org/r/20210914140235.65955-3-sven@svenpeter.dev
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/usb/typec/tps6598x.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/usb/typec/tps6598x.c b/drivers/usb/typec/tps6598x.c
index 987b8fcfb2aae..a4dd23a8f1954 100644
--- a/drivers/usb/typec/tps6598x.c
+++ b/drivers/usb/typec/tps6598x.c
@@ -93,7 +93,7 @@ tps6598x_block_read(struct tps6598x *tps, u8 reg, void *val, size_t len)
 	u8 data[TPS_MAX_LEN + 1];
 	int ret;
 
-	if (WARN_ON(len + 1 > sizeof(data)))
+	if (len + 1 > sizeof(data))
 		return -EINVAL;
 
 	if (!tps->i2c_protocol)
-- 
2.33.0