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. When in interrupt context, use mdelay instead of msleep. Signed-off-by: Fuqian Huang <huangfq.daxian@xxxxxxxxx> --- drivers/i2c/busses/i2c-pxa.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/i2c/busses/i2c-pxa.c b/drivers/i2c/busses/i2c-pxa.c index 2c3c3d6935c0..876e693bafd9 100644 --- a/drivers/i2c/busses/i2c-pxa.c +++ b/drivers/i2c/busses/i2c-pxa.c @@ -456,7 +456,10 @@ static int i2c_pxa_wait_slave(struct pxa_i2c *i2c) return 1; } - msleep(1); + if (in_interrupt()) + mdelay(1); + else + msleep(1); } if (i2c_debug > 0) -- 2.11.0
