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authorJia-Ju Bai <baijiaju1990@gmail.com>2018-01-25 18:45:05 +0800
committerTejun Heo <tj@kernel.org>2018-01-25 07:28:31 -0800
commitb3506c7ed216dd2db1f06c2845da45018e2c508d (patch)
treecc46253531a7aea4f48ec8ac1b50260ac33ee45d /drivers
parenteada8598e69f9ff767c387951f40bab5aafe6a88 (diff)
ata: pata_pdc2027x: Replace mdelay with msleep
After checking all possible call chains to pdc_adjust_pll and pdc_detect_pll_input_clock, my tool finds that these functions are never called in atomic context, namely never in an interrupt handler or holding a spinlock. And their caller functions pdc2027x_init_one and pdc2027x_reinit_one calls pci_enable_device which can sleep, and no spinlock is held when calling pdc_adjust_pll and pdc_detect_pll_input_clock, so it proves that pdc_adjust_pll and pdc_detect_pll_input_clock can call functions which can sleep. Thus mdelay can be replaced with msleep to avoid busy wait. Signed-off-by: Jia-Ju Bai <baijiaju1990@gmail.com> Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/ata/pata_pdc2027x.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/ata/pata_pdc2027x.c b/drivers/ata/pata_pdc2027x.c
index 6db2e34bd52f..1a18e675ba9f 100644
--- a/drivers/ata/pata_pdc2027x.c
+++ b/drivers/ata/pata_pdc2027x.c
@@ -580,7 +580,7 @@ static void pdc_adjust_pll(struct ata_host *host, long pll_clock, unsigned int b
ioread16(mmio_base + PDC_PLL_CTL); /* flush */
/* Wait the PLL circuit to be stable */
- mdelay(30);
+ msleep(30);
#ifdef PDC_DEBUG
/*
@@ -620,7 +620,7 @@ static long pdc_detect_pll_input_clock(struct ata_host *host)
start_time = ktime_get();
/* Let the counter run for 100 ms. */
- mdelay(100);
+ msleep(100);
/* Read the counter values again */
end_count = pdc_read_counter(host);

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