i2c: designware: fix IO timeout issue for AMD controller

[cascardo/linux.git] / drivers / i2c / busses / i2c-designware-core.c

diff --git a/drivers/i2c/busses/i2c-designware-core.c b/drivers/i2c/busses/i2c-designware-core.c
index 8c48b27..de7fbbb 100644 (file)
--- a/drivers/i2c/busses/i2c-designware-core.c
+++ b/drivers/i2c/busses/i2c-designware-core.c
@@ -813,6 +813,12 @@ static irqreturn_t i2c_dw_isr(int this_irq, void *dev_id)
 tx_aborted:
        if ((stat & (DW_IC_INTR_TX_ABRT | DW_IC_INTR_STOP_DET)) || dev->msg_err)
                complete(&dev->cmd_complete);
+       else if (unlikely(dev->accessor_flags & ACCESS_INTR_MASK)) {
+               /* workaround to trigger pending interrupt */
+               stat = dw_readl(dev, DW_IC_INTR_MASK);
+               i2c_dw_disable_int(dev);
+               dw_writel(dev, stat, DW_IC_INTR_MASK);
+       }
 
        return IRQ_HANDLED;
 }