The interrupt handler dw_i2c_isr may be racing with i2c_dw_xfer_init. Use disable_irq/enable_irq when setting up the adapter. Cc: Ben Gardner <gardner.ben@xxxxxxxxx> Cc: Jarkko Nikula <jarkko.nikula@xxxxxxxxxxxxxxx> Cc: Wolfram Sang <wsa@xxxxxxxxxxxxx> Signed-off-by: Alexander Monakov <amonakov@xxxxxxxxx> --- drivers/i2c/busses/i2c-designware-master.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/i2c/busses/i2c-designware-master.c b/drivers/i2c/busses/i2c-designware-master.c index fd36c39ddf4e..e7fd0e57ab1f 100644 --- a/drivers/i2c/busses/i2c-designware-master.c +++ b/drivers/i2c/busses/i2c-designware-master.c @@ -181,6 +181,7 @@ static void i2c_dw_xfer_init(struct dw_i2c_dev *dev) /* Disable the adapter */ __i2c_dw_enable_and_wait(dev, false); + disable_irq(dev->irq); /* If the slave address is ten bit address, enable 10BITADDR */ ic_con = dw_readl(dev, DW_IC_CON); @@ -214,6 +215,7 @@ static void i2c_dw_xfer_init(struct dw_i2c_dev *dev) /* Clear and enable interrupts */ dw_readl(dev, DW_IC_CLR_INTR); dw_writel(dev, DW_IC_INTR_MASTER_MASK, DW_IC_INTR_MASK); + enable_irq(dev->irq); } /* -- 2.11.0
