| Message ID | 1305828085-25135-1-git-send-email-linus.walleij@stericsson.com (mailing list archive) |
|---|---|
| State | Superseded, archived |
| Headers | show |
On Thu, May 19, 2011 at 08:01:25PM +0200, Linus Walleij wrote: > 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> Applied, thanks. g. > --- > 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 18667de..8a2b88a 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) > message->state = STATE_ERROR; > goto out; > } > + cpu_relax(); > } > > /* Update total byte transferred */ > -- > 1.7.3.2 > ------------------------------------------------------------------------------ What Every C/C++ and Fortran developer Should Know! Read this article and learn how Intel has extended the reach of its next-generation tools to help Windows* and Linux* C/C++ and Fortran developers boost performance applications - including clusters. http://p.sf.net/sfu/intel-dev2devmay
diff --git a/drivers/spi/amba-pl022.c b/drivers/spi/amba-pl022.c index 18667de..8a2b88a 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) message->state = STATE_ERROR; goto out; } + cpu_relax(); } /* Update total byte transferred */
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> --- drivers/spi/amba-pl022.c | 1 + 1 files changed, 1 insertions(+), 0 deletions(-)