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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>
This commit is contained in:
Chaotian Jing 2016-05-19 16:47:42 +08:00 committed by Ulf Hansson
parent 08573eaf1a
commit 987aa5f805
1 changed files with 1 additions and 1 deletions
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2
drivers/mmc/core/mmc_ops.c
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@ -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