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i2c: iproc: handle only slave interrupts which are enabled

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[ Upstream commit 545f4011e1 ]

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: c245d94ed1 ("i2c: iproc: Add multi byte read-write support for slave mode")
Signed-off-by: Rayagonda Kokatanur <rayagonda.kokatanur@broadcom.com>
Acked-by: Ray Jui <ray.jui@broadcom.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Rayagonda Kokatanur 2020-11-02 09:24:29 +05:30 committed by Greg Kroah-Hartman
parent 8b63c0cbc7
commit d8a5e1780a
1 changed files with 9 additions and 4 deletions
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13
drivers/i2c/busses/i2c-bcm-iproc.c
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@ -503,12 +503,17 @@ 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