Most bits of the AT91 SR status register are cleared after reading, so we may lose the status at the end of the wait loop. Let's use the value already readed to check for "completed" status. Signed-off-by: Alexander Shiyan <eagle.alexander923@xxxxxxxxx> --- drivers/i2c/busses/i2c-at91.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/i2c/busses/i2c-at91.c b/drivers/i2c/busses/i2c-at91.c index dbc5aa4ddf..8929dbaede 100644 --- a/drivers/i2c/busses/i2c-at91.c +++ b/drivers/i2c/busses/i2c-at91.c @@ -276,7 +276,7 @@ static int at91_twi_wait_completion(struct at91_twi_dev *dev) dev->transfer_status |= status; - } while (!(at91_twi_read(dev, AT91_TWI_SR) & AT91_TWI_TXCOMP)); + } while (!(status & AT91_TWI_TXCOMP)); at91_disable_twi_interrupts(dev); -- 2.39.1
