[PATCH AUTOSEL 5.4 09/30] usb: typec: tipd: Remove WARN_ON in tps6598x_block_read

Sasha Levin
2021-11-09T22:36:47Z

From: Sven Peter <sven@svenpeter.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@linux.intel.com>
Signed-off-by: Sven Peter <sven@svenpeter.dev>
Link: https://lore.kernel.org/r/20210914140235.65955-3-sven@svenpeter.dev
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.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 a38d1409f15b7..67bebee693301 100644
--- a/drivers/usb/typec/tps6598x.c
+++ b/drivers/usb/typec/tps6598x.c
@@ -109,7 +109,7 @@ 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