snd_ad1889_ac97_ready() is never called in atomic context.

The call chain ending up at snd_ad1889_ac97_ready() is: [1] snd_ad1889_ac97_ready() <- snd_ad1889_ac97_xinit() <- snd_ad1889_ac97_init() <- snd_ad1889_probe()

snd_ad1889_probe() is only set as ".probe" in struct pci_driver. This function is not called in atomic context.

Despite never getting called from atomic context, snd_ad1889_ac97_ready() calls mdelay for busy wait. This is not necessary and can be replaced with usleep_range to avoid busy waiting.

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

Signed-off-by: Jia-Ju Bai baijiaju1990@gmail.com --- sound/pci/ad1889.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sound/pci/ad1889.c b/sound/pci/ad1889.c index 0bf2c04..a2a8e1d 100644 --- a/sound/pci/ad1889.c +++ b/sound/pci/ad1889.c @@ -258,7 +258,7 @@ struct snd_ad1889 { while (!(ad1889_readw(chip, AD_AC97_ACIC) & AD_AC97_ACIC_ACRDY) && --retry) - mdelay(1); + usleep_range(1000, 2000); if (!retry) { dev_err(chip->card->dev, "[%s] Link is not ready.\n", __func__);