diff options
| author | Linus Walleij <linus.walleij@stericsson.com> | 2011-05-19 14:01:25 -0400 |
|---|---|---|
| committer | Grant Likely <grant.likely@secretlab.ca> | 2011-05-20 02:43:07 -0400 |
| commit | 521999bd4a8c47a86136b9d8223a9480f5906db8 (patch) | |
| tree | 3aae84e1eacfc6f96e7d7ef244f511e0afa72653 /drivers/spi | |
| parent | 7f9a4b9797405061a07fca26ff1b4f305c564e5d (diff) | |
spi/pl022: use cpu_relax in the busy loop
This relaxes the cpu in the polling busy-wait loop.
Reported-by: Vitaly Wool <vitalywool@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Diffstat (limited to 'drivers/spi')
| -rw-r--r-- | drivers/spi/amba-pl022.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/spi/amba-pl022.c b/drivers/spi/amba-pl022.c index 18667de436f1..8a2b88aee373 100644 --- a/drivers/spi/amba-pl022.c +++ b/drivers/spi/amba-pl022.c | |||
| @@ -1424,6 +1424,7 @@ static void do_polling_transfer(struct pl022 *pl022) | |||
| 1424 | message->state = STATE_ERROR; | 1424 | message->state = STATE_ERROR; |
| 1425 | goto out; | 1425 | goto out; |
| 1426 | } | 1426 | } |
| 1427 | cpu_relax(); | ||
| 1427 | } | 1428 | } |
| 1428 | 1429 | ||
| 1429 | /* Update total byte transferred */ | 1430 | /* Update total byte transferred */ |