Commit 521999bd authored by Linus Walleij's avatar Linus Walleij Committed by Grant Likely
Browse files

spi/pl022: use cpu_relax in the busy loop 



This relaxes the cpu in the polling busy-wait loop.

Reported-by: default avatarVitaly Wool <vitalywool@gmail.com>
Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: default avatarGrant 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 */