From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
To: "William A. Kennington III" <william@wkennington.com>
Cc: Mika Westerberg <mika.westerberg@linux.intel.com>,
Jan Dabros <jsd@semihalf.com>, Andi Shyti <andi.shyti@kernel.org>,
linux-i2c@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v4 4/4] i2c: designware: Handle active target cleanly
Date: Fri, 8 May 2026 13:01:11 +0300 [thread overview]
Message-ID: <af20Z54nj0x21Ybz@ashevche-desk.local> (raw)
In-Reply-To: <20260507-dw-i2c-v4-4-9a447b23bfdf@wkennington.com>
On Thu, May 07, 2026 at 08:05:18PM +0000, William A. Kennington III wrote:
> When the I2C controller attempts a new transaction while the target
> controller is shutting down or restarting, it can lead to bus lockups
> and system bootloops if the hardware enters an inconsistent state.
>
> Address this by ensuring that the internal state machines are properly
> cleared when disabling the controller if target activity is detected.
>
> If the controller remains active after disabling, perform a bus recovery
> to reset it to a known good state.
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
--
With Best Regards,
Andy Shevchenko
prev parent reply other threads:[~2026-05-08 10:01 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-05-07 20:05 [PATCH v4 0/4] i2c: designware: Improve device disable handling William A. Kennington III
2026-05-07 20:05 ` [PATCH v4 1/4] i2c: designware: Introduce shutdown exported function William A. Kennington III
2026-05-08 8:12 ` Andy Shevchenko
2026-05-08 10:01 ` Andy Shevchenko
2026-05-07 20:05 ` [PATCH v4 2/4] i2c: designware: Convert PCI driver to use shutdown hook William A. Kennington III
2026-05-08 8:15 ` Andy Shevchenko
2026-05-11 19:55 ` William A. Kennington III
2026-05-07 20:05 ` [PATCH v4 3/4] i2c: designware: Convert platform " William A. Kennington III
2026-05-08 8:15 ` Andy Shevchenko
2026-05-11 19:55 ` William A. Kennington III
2026-05-07 20:05 ` [PATCH v4 4/4] i2c: designware: Handle active target cleanly William A. Kennington III
2026-05-08 10:01 ` Andy Shevchenko [this message]
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