Due to the relatively low priority of the isr_thread, when the CPU load is high, the execution of sprd_i2c_isr_thread will be delayed. After the waiting time is exceeded, the IIC driver will perform operations such as disabling the IIC controller. Later, when sprd_i2c_isr_thread is called by the CPU, there will be kernel panic caused by illegal access to the IIC register. After pressure testing, we found that increasing the IIC waiting time to 10 seconds can avoid this problem. Signed-off-by: Huangzheng Lai <Huangzheng.Lai@xxxxxxxxxx> --- drivers/i2c/busses/i2c-sprd.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/i2c/busses/i2c-sprd.c b/drivers/i2c/busses/i2c-sprd.c index 6f65f28ea69d..3c7af04fa177 100644 --- a/drivers/i2c/busses/i2c-sprd.c +++ b/drivers/i2c/busses/i2c-sprd.c @@ -76,7 +76,7 @@ /* timeout (ms) for pm runtime autosuspend */ #define SPRD_I2C_PM_TIMEOUT 1000 /* timeout (ms) for transfer message */ -#define I2C_XFER_TIMEOUT 1000 +#define I2C_XFER_TIMEOUT 10000 /* dynamic modify clk_freq flag */ #define I2C_3M4_FLAG 0x0100 #define I2C_1M_FLAG 0x0080 -- 2.17.1
