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 <[email protected]> --- 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
