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authorWolfram Sang <wsa+renesas@sang-engineering.com>2017-11-14 23:55:20 +0100
committerUlf Hansson <ulf.hansson@linaro.org>2017-12-11 12:44:29 +0100
commit96455380ece1c786f0a8822ea8b312e6445a3d93 (patch)
tree05387bc26e57f24f15ed094bdda4b34cc134e463 /drivers/mmc/core
parent97618aca1440b5addc5c3d78659d3e176be23b80 (diff)
downloadlinux-96455380ece1c786f0a8822ea8b312e6445a3d93.tar.bz2
mmc: core: use usleep_range rather than HZ magic in mmc_delay()
Documentation/timers/timers-howto.txt recommends to use usleep_range for delays 1-20ms. Let's adhere to it. No need for messing with HZ and still do busy looping these days. Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/mmc/core')
-rw-r--r--drivers/mmc/core/core.h8
1 files changed, 3 insertions, 5 deletions
diff --git a/drivers/mmc/core/core.h b/drivers/mmc/core/core.h
index 71e6c6d7ceb7..b2877e2d740f 100644
--- a/drivers/mmc/core/core.h
+++ b/drivers/mmc/core/core.h
@@ -62,12 +62,10 @@ void mmc_set_initial_state(struct mmc_host *host);
static inline void mmc_delay(unsigned int ms)
{
- if (ms < 1000 / HZ) {
- cond_resched();
- mdelay(ms);
- } else {
+ if (ms <= 20)
+ usleep_range(ms * 1000, ms * 1250);
+ else
msleep(ms);
- }
}
void mmc_rescan(struct work_struct *work);