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authorJia-Ju Bai <baijiaju1990@gmail.com>2018-01-27 00:38:35 +0800
committerKalle Valo <kvalo@codeaurora.org>2018-02-27 15:52:13 +0200
commit8100091d02487ff267af0d410ceb9eefebc8ea03 (patch)
treeda22bf476d964aaa59c6ac7a293046f79a1947a7 /drivers/bcma
parent3142467fc15ba19a327dcedafcf913bc7832f6d1 (diff)
downloadlinux-8100091d02487ff267af0d410ceb9eefebc8ea03.tar.bz2
bcma: Replace mdelay with usleep_range in bcma_pmu_resources_init
After checking all possible call chains to bcma_pmu_resources_init() here, my tool finds that this function is never called in atomic context, namely never in an interrupt handler or holding a spinlock. Thus mdelay can be replaced with usleep_range to avoid busy wait. This is found by a static analysis tool named DCNS written by myself. Signed-off-by: Jia-Ju Bai <baijiaju1990@gmail.com> Acked-by: Larry Finger <Larry.Finger@lwfinger.net> Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Diffstat (limited to 'drivers/bcma')
-rw-r--r--drivers/bcma/driver_chipcommon_pmu.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/bcma/driver_chipcommon_pmu.c b/drivers/bcma/driver_chipcommon_pmu.c
index f1eb4d3e1d57..f4161064365c 100644
--- a/drivers/bcma/driver_chipcommon_pmu.c
+++ b/drivers/bcma/driver_chipcommon_pmu.c
@@ -203,7 +203,7 @@ static void bcma_pmu_resources_init(struct bcma_drv_cc *cc)
* Add some delay; allow resources to come up and settle.
* Delay is required for SoC (early init).
*/
- mdelay(2);
+ usleep_range(2000, 2500);
}
/* Disable to allow reading SPROM. Don't know the adventages of enabling it. */