linux-kernel - [PATCH V2 0/2] i2c: imx: Fix block read handling for invalid length

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Message-ID: <20260116091704.3399142-1-Qing-wu.Li@leica-geosystems.com.cn>
Date: Fri, 16 Jan 2026 09:17:02 +0000
From: LI Qingwu <Qing-wu.Li@...ca-geosystems.com.cn>
To: o.rempel@...gutronix.de,
	kernel@...gutronix.de,
	andi.shyti@...nel.org,
	shawnguo@...nel.org,
	s.hauer@...gutronix.de,
	festevam@...il.com,
	linux-i2c@...r.kernel.org,
	imx@...ts.linux.dev,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Cc: bsp-development.geo@...ca-geosystems.com,
	LI Qingwu <Qing-wu.Li@...ca-geosystems.com.cn>
Subject: [PATCH V2 0/2] i2c: imx: Fix block read handling for invalid length

This series fixes a crash and bus lockup when SMBus block read operations
encounter invalid length values (zero or greater than I2C_SMBUS_BLOCK_MAX).

Both patches have been tested on i.MX 8M Plus with continuous block read
operations from battery and keyboard devices sharing the same I2C bus.

Changes in v2:
  - Split into two patches for clearer separation of concerns
  - Add detailed comments with reference manual citations
  - Implement abort handling in a dedicated ISR state and handler function
  - Remove modifications to i2c_imx_stop() to avoid affecting normal stop

LI Qingwu (2):
  i2c: imx: preserve error state in block data length handler
  i2c: imx: add abort path for invalid block length

 drivers/i2c/busses/i2c-imx.c | 58 ++++++++++++++++++++++++++++++++++--
 1 file changed, 55 insertions(+), 3 deletions(-)

-- 
2.43.0