linux-kernel - [PATCH 5.10 062/130] i2c: stm32f7: recover the bus on access timeout

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20211206145601.816983146@linuxfoundation.org>
Date:   Mon,  6 Dec 2021 15:56:19 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Alain Volmat <alain.volmat@...s.st.com>,
        Pierre-Yves MORDRET <pierre-yves.mordret@...s.st.com>,
        Wolfram Sang <wsa@...nel.org>
Subject: [PATCH 5.10 062/130] i2c: stm32f7: recover the bus on access timeout

From: Alain Volmat <alain.volmat@...s.st.com>

commit b933d1faf8fa30d16171bcff404e39c41b2a7c84 upstream.

When getting an access timeout, ensure that the bus is in a proper
state prior to returning the error.

Fixes: aeb068c57214 ("i2c: i2c-stm32f7: add driver")
Signed-off-by: Alain Volmat <alain.volmat@...s.st.com>
Reviewed-by: Pierre-Yves MORDRET <pierre-yves.mordret@...s.st.com>
Signed-off-by: Wolfram Sang <wsa@...nel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/i2c/busses/i2c-stm32f7.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/drivers/i2c/busses/i2c-stm32f7.c
+++ b/drivers/i2c/busses/i2c-stm32f7.c
@@ -1681,6 +1681,7 @@ static int stm32f7_i2c_xfer(struct i2c_a
 			i2c_dev->msg->addr);
 		if (i2c_dev->use_dma)
 			dmaengine_terminate_all(dma->chan_using);
+		stm32f7_i2c_wait_free_bus(i2c_dev);
 		ret = -ETIMEDOUT;
 	}
 
@@ -1738,6 +1739,7 @@ static int stm32f7_i2c_smbus_xfer(struct
 		dev_dbg(dev, "Access to slave 0x%x timed out\n", f7_msg->addr);
 		if (i2c_dev->use_dma)
 			dmaengine_terminate_all(dma->chan_using);
+		stm32f7_i2c_wait_free_bus(i2c_dev);
 		ret = -ETIMEDOUT;
 		goto pm_free;
 	}