linux-kernel - Re: [PATCH v2 1/1] i2c: designware: Disable SMBus interrupts to prevent storms from mis-configured firmware

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Message-ID: <20251021073618.GQ2912318@black.igk.intel.com>
Date: Tue, 21 Oct 2025 09:36:18 +0200
From: Mika Westerberg <mika.westerberg@...ux.intel.com>
To: Jinhui Guo <guojinhui.liam@...edance.com>
Cc: andriy.shevchenko@...ux.intel.com, jsd@...ihalf.com,
	andi.shyti@...nel.org, linux-i2c@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 1/1] i2c: designware: Disable SMBus interrupts to
 prevent storms from mis-configured firmware

On Tue, Oct 21, 2025 at 03:24:31PM +0800, Jinhui Guo wrote:
> When probing the I2C master, disable SMBus interrupts to prevent
> storms caused by broken firmware mis-configuring IC_SMBUS=1; the
> handler never services them and a mis-configured SMBUS Master
> extend-clock timeout or SMBUS Slave extend-clock timeout can
> flood the CPU.
> 
> Signed-off-by: Jinhui Guo <guojinhui.liam@...edance.com>
> Reviewed-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>

Acked-by: Mika Westerberg <mika.westerberg@...ux.intel.com>