i2c: aspeed: Mask IRQ status to relevant bits

Mask the IRQ status to only the bits that the driver checks. This
prevents excessive driver warnings when operating in slave mode
when additional bits are set that the driver doesn't handle.

Signed-off-by: Eddie James <eajames@linux.ibm.com>
Reviewed-by: Tao Ren <rentao.bupt@gmail.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>

diff --git a/drivers/i2c/busses/i2c-aspeed.c b/drivers/i2c/busses/i2c-aspeed.c
index 3126807..724bf30 100644 (file)
--- a/drivers/i2c/busses/i2c-aspeed.c
+++ b/drivers/i2c/busses/i2c-aspeed.c
@@ -69,6 +69,7 @@
  * These share bit definitions, so use the same values for the enable &
  * status bits.
  */
+#define ASPEED_I2CD_INTR_RECV_MASK                     0xf000ffff
 #define ASPEED_I2CD_INTR_SDA_DL_TIMEOUT                        BIT(14)
 #define ASPEED_I2CD_INTR_BUS_RECOVER_DONE              BIT(13)
 #define ASPEED_I2CD_INTR_SLAVE_MATCH                   BIT(7)
@@ -604,6 +605,7 @@ static irqreturn_t aspeed_i2c_bus_irq(int irq, void *dev_id)
        writel(irq_received & ~ASPEED_I2CD_INTR_RX_DONE,
               bus->base + ASPEED_I2C_INTR_STS_REG);
        readl(bus->base + ASPEED_I2C_INTR_STS_REG);
+       irq_received &= ASPEED_I2CD_INTR_RECV_MASK;
        irq_remaining = irq_received;
 
 #if IS_ENABLED(CONFIG_I2C_SLAVE)