Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-11-27 14:41:39 +00:00
Code Issues Packages Projects Releases Wiki Activity

ALSA: ctxfi: cthw20k2: Replace mdelay() with msleep() and usleep_range()

Browse Source 
hw_pll_init(), hw_dac_stop(), hw_dac_start() and hw_adc_init()
are never called in atomic context.
They call mdelay() to busily wait, which is not necessary.
mdelay() can be replaced with msleep().

This is found by a static analysis tool named DCNS written by myself.

Signed-off-by: Jia-Ju Bai <baijiaju1990@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Jia-Ju Bai 2018-07-27 17:01:43 +08:00 committed by Takashi Iwai
parent 08fd8325d9
commit fad56c895f
1 changed files with 6 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
sound/pci/ctxfi/cthw20k2.c
View File

@ -1316,12 +1316,12 @@ static int hw_pll_init(struct hw *hw, unsigned int rsr)
set_field(&pllctl, PLLCTL_FD, 48000 == rsr ? 16 - 4 : 147 - 4);
set_field(&pllctl, PLLCTL_RD, 48000 == rsr ? 1 - 1 : 10 - 1);
hw_write_20kx(hw, PLL_CTL, pllctl);
mdelay(40);
msleep(40);
pllctl = hw_read_20kx(hw, PLL_CTL);
set_field(&pllctl, PLLCTL_FD, 48000 == rsr ? 16 - 2 : 147 - 2);
hw_write_20kx(hw, PLL_CTL, pllctl);
mdelay(40);
msleep(40);
for (i = 0; i < 1000; i++) {
pllstat = hw_read_20kx(hw, PLL_STAT);
@ -1584,7 +1584,7 @@ static void hw_dac_stop(struct hw *hw)
data = hw_read_20kx(hw, GPIO_DATA);
data &= 0xFFFFFFFD;
hw_write_20kx(hw, GPIO_DATA, data);
mdelay(10);
usleep_range(10000, 11000);
}
static void hw_dac_start(struct hw *hw)
@ -1593,7 +1593,7 @@ static void hw_dac_start(struct hw *hw)
data = hw_read_20kx(hw, GPIO_DATA);
data |= 0x2;
hw_write_20kx(hw, GPIO_DATA, data);
mdelay(50);
msleep(50);
}
static void hw_dac_reset(struct hw *hw)
@ -1864,11 +1864,11 @@ static int hw_adc_init(struct hw *hw, const struct adc_conf *info)
hw_write_20kx(hw, GPIO_DATA, data);
}
mdelay(10);
usleep_range(10000, 11000);
/* Return the ADC to normal operation. */
data |= (0x1 << 15);
hw_write_20kx(hw, GPIO_DATA, data);
mdelay(50);
msleep(50);
/* I2C write to register offset 0x0B to set ADC LRCLK polarity */
/* invert bit, interface format to I2S, word length to 24-bit, */