Commit 521999bd authored May 19, 2011 by Linus Walleij Committed by Grant Likely May 20, 2011

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>

parent 7f9a4b97

drivers/spi/amba-pl022.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -1424,6 +1424,7 @@ static void do_polling_transfer(struct pl022 *pl022)
		message->state = STATE_ERROR;
		goto out;
		}
		cpu_relax();
		}

		/* Update total byte transferred */