Handle only slave interrupts which are enabled.
The IS_OFFSET register contains the interrupt status bits which will be
set regardless of the enabling of the corresponding interrupt condition.
One must therefore look at both IS_OFFSET and IE_OFFSET to determine
whether an interrupt condition is set and enabled.
Fixes: c245d94ed106 ("i2c: iproc: Add multi byte read-write support for slave mode")
Signed-off-by: Rayagonda Kokatanur <rayagonda.kokatanur@xxxxxxxxxxxx>
Acked-by: Ray Jui <ray.jui@xxxxxxxxxxxx>
---
drivers/i2c/busses/i2c-bcm-iproc.c | 13 +++++++++----
1 file changed, 9 insertions(+), 4 deletions(-)
diff --git a/drivers/i2c/busses/i2c-bcm-iproc.c b/drivers/i2c/busses/i2c-bcm-iproc.c
index 834a98caeada..b54f5130d246 100644
--- a/drivers/i2c/busses/i2c-bcm-iproc.c
+++ b/drivers/i2c/busses/i2c-bcm-iproc.c
@@ -507,12 +507,17 @@ static void bcm_iproc_i2c_process_m_event(struct bcm_iproc_i2c_dev *iproc_i2c,
static irqreturn_t bcm_iproc_i2c_isr(int irq, void *data)
{
struct bcm_iproc_i2c_dev *iproc_i2c = data;
- u32 status = iproc_i2c_rd_reg(iproc_i2c, IS_OFFSET);
+ u32 slave_status;
+ u32 status;
bool ret;
- u32 sl_status = status & ISR_MASK_SLAVE;
- if (sl_status) {
- ret = bcm_iproc_i2c_slave_isr(iproc_i2c, sl_status);
+ status = iproc_i2c_rd_reg(iproc_i2c, IS_OFFSET);
+ /* process only slave interrupt which are enabled */
+ slave_status = status & iproc_i2c_rd_reg(iproc_i2c, IE_OFFSET) &
+ ISR_MASK_SLAVE;
+
+ if (slave_status) {
+ ret = bcm_iproc_i2c_slave_isr(iproc_i2c, slave_status);
if (ret)
return IRQ_HANDLED;
else
--
2.17.1
Attachment:
smime.p7s
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