From: Wolfram Sang <wsa@kernel.org>
To: Jian Zhang <zhangjian.3032@bytedance.com>
Cc: brendan.higgins@linux.dev, benh@kernel.crashing.org,
joel@jms.id.au, andrew@aj.id.au, zhangjian3032@gmail.com,
yulei.sh@bytedance.com, xiexinnan@bytedance.com,
Andi Shyti <andi.shyti@kernel.org>,
Tommy Huang <tommy_huang@aspeedtech.com>,
"open list:ARM/ASPEED I2C DRIVER" <linux-i2c@vger.kernel.org>,
"moderated list:ARM/ASPEED I2C DRIVER" <openbmc@lists.ozlabs.org>,
"moderated list:ARM/ASPEED MACHINE SUPPORT"
<linux-arm-kernel@lists.infradead.org>,
"moderated list:ARM/ASPEED MACHINE SUPPORT"
<linux-aspeed@lists.ozlabs.org>,
open list <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v2] i2c: aspeed: Fix i2c bus hang in slave read
Date: Fri, 29 Sep 2023 09:39:37 +0200 [thread overview]
Message-ID: <ZRZ/ObZmntMLw2r+@ninjato> (raw)
In-Reply-To: <20230927154244.3774670-1-zhangjian.3032@bytedance.com>
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On Wed, Sep 27, 2023 at 11:42:43PM +0800, Jian Zhang wrote:
> When the `CONFIG_I2C_SLAVE` option is enabled and the device operates
> as a slave, a situation arises where the master sends a START signal
> without the accompanying STOP signal. This action results in a
> persistent I2C bus timeout. The core issue stems from the fact that
> the i2c controller remains in a slave read state without a timeout
> mechanism. As a consequence, the bus perpetually experiences timeouts.
>
> In this case, the i2c bus will be reset, but the slave_state reset is
> missing.
>
> Fixes: fee465150b45 ("i2c: aspeed: Reset the i2c controller when timeout occurs")
> Signed-off-by: Jian Zhang <zhangjian.3032@bytedance.com>
Somebody wants to add tags here? I think it should go to my pull request
this week.
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next prev parent reply other threads:[~2023-09-29 7:40 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-09-27 15:42 [PATCH v2] i2c: aspeed: Fix i2c bus hang in slave read Jian Zhang
2023-09-28 14:51 ` Andi Shyti
2023-09-28 15:04 ` [External] " Jian Zhang
2023-10-03 22:54 ` Andi Shyti
2023-09-29 7:39 ` Wolfram Sang [this message]
2023-10-04 6:08 ` Andrew Jeffery
2023-10-05 7:55 ` Quan Nguyen
2023-10-06 0:19 ` Andrew Jeffery
2023-10-06 2:25 ` [External] " Jian Zhang
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