i2c_pxa_handler -> i2c_pxa_irq_txempty ->
i2c_pxa_reset -> i2c_pxa_set_slave -> i2c_pxa_wait_slave
As i2c_pxa_handler is an interrupt handler, it will finally
calls i2c_pxa_wait_slave which calls msleep.
Add in_interrupt check before msleep to avoid sleep
in IRQ context.
Signed-off-by: Fuqian Huang <huangfq.daxian@xxxxxxxxx>
---
drivers/i2c/busses/i2c-pxa.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/i2c/busses/i2c-pxa.c b/drivers/i2c/busses/i2c-pxa.c
index 2c3c3d6935c0..b35a0e8efcb2 100644
--- a/drivers/i2c/busses/i2c-pxa.c
+++ b/drivers/i2c/busses/i2c-pxa.c
@@ -443,6 +443,8 @@ static int i2c_pxa_wait_slave(struct pxa_i2c *i2c)
show_state(i2c);
+ if (in_interrupt())
+ return 0;
while (time_before(jiffies, timeout)) {
if (i2c_debug > 1)
dev_dbg(&i2c->adap.dev, "%s: %ld: ISR=%08x, ICR=%08x, IBMR=%02x\n",
--
2.11.0
