spi: Fix race condition in stop_queue()

There's a race condition in stop_queue() in some drivers -
if drv_data->queue is empty, but drv_data->busy is still set
(or opposite situation) stop_queue will return -EBUSY.
So fix loop condition to check that both drv_data->queue is empty
and drv_data->busy is not set.

This patch affects following drivers:
pxa2xx_spi
spi_bfin5xx
amba-pl022
dw_spi

Signed-off-by: Vasily Khoruzhick <[email protected]>
Acked-by: Eric Miao <[email protected]>
Acked-by: Mike Frysinger <[email protected]>
Signed-off-by: Grant Likely <[email protected]>

0 files changed, 0 insertions, 0 deletions