Commit 987aa5f8 authored May 19, 2016 by Chaotian Jing Committed by Ulf Hansson Jul 25, 2016

mmc: mmc: fix switch timeout issue caused by jiffies precision



with CONFIG_HZ=100, the precision of jiffies is 10ms, and the
generic_cmd6_time of some card is also 10ms. then, may be current
time is only 5ms, but already timed out caused by jiffies precision.

Signed-off-by: Chaotian Jing <chaotian.jing@mediatek.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

parent 08573eaf

drivers/mmc/core/mmc_ops.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -534,7 +534,7 @@ int __mmc_switch(struct mmc_card *card, u8 set, u8 index, u8 value,
		timeout_ms = MMC_OPS_TIMEOUT_MS;

		/* Must check status to be sure of no errors. */
		timeout = jiffies + msecs_to_jiffies(timeout_ms);
		timeout = jiffies + msecs_to_jiffies(timeout_ms) + 1;
		do {
		/*
		* Due to the possibility of being preempted after