i2c: aspeed: Mask IRQ status to relevant bits

[ Upstream commit 1a1d6db23ddacde0b15ea589e9103373e05af8de ]

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>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/i2c/busses/i2c-aspeed.c b/drivers/i2c/busses/i2c-aspeed.c
index f51702d86a90e708f11f1d27b89f9a98b49ed1cc..1ad74efcab372649005a46bf5600c85f2c5f654b 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)