From: Alexander Stein <alexander.stein@ew.tq-group.com>

Date: Mon, 30 Jan 2023 16:32:46 +0100

Subject: [PATCH] i2c: imx-lpi2c: clean rx/tx buffers upon new message

References: bsc#1012628

Patch-mainline: 6.2.12

Git-commit: 987dd36c0141f6ab9f0fbf14d6b2ec3342dedb2f

[ Upstream commit 987dd36c0141f6ab9f0fbf14d6b2ec3342dedb2f ]

When start sending a new message clear the Rx & Tx buffer pointers in

order to avoid using stale pointers.

Signed-off-by: Alexander Stein <alexander.stein@ew.tq-group.com>

Tested-by: Emanuele Ghidoli <emanuele.ghidoli@toradex.com>

Signed-off-by: Wolfram Sang <wsa@kernel.org>

Signed-off-by: Sasha Levin <sashal@kernel.org>

Signed-off-by: Jiri Slaby <jslaby@suse.cz>

---

 drivers/i2c/busses/i2c-imx-lpi2c.c | 2 ++

 1 file changed, 2 insertions(+)

diff --git a/drivers/i2c/busses/i2c-imx-lpi2c.c b/drivers/i2c/busses/i2c-imx-lpi2c.c

index 9b2f9544..a49b14d5 100644

--- a/drivers/i2c/busses/i2c-imx-lpi2c.c

+++ b/drivers/i2c/busses/i2c-imx-lpi2c.c

@@ -463,6 +463,8 @@ static int lpi2c_imx_xfer(struct i2c_adapter *adapter,

 		if (num == 1 && msgs[0].len == 0)

 			goto stop;

+		lpi2c_imx->rx_buf = NULL;

+		lpi2c_imx->tx_buf = NULL;

 		lpi2c_imx->delivered = 0;

 		lpi2c_imx->msglen = msgs[i].len;

 		init_completion(&lpi2c_imx->complete);

-- 

2.35.3