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authorTakashi Iwai <tiwai@suse.de>2020-08-03 16:39:58 +0200
committerTakashi Iwai <tiwai@suse.de>2020-08-11 14:21:49 +0200
commit85cb905d3c5ff6107f4948314731c1b55b689cfc (patch)
tree529ced751eeac91fae6e89244d88786e64c1f3bf /sound
parent34dedd2a83b241ba6aeb290260313c65dc58660e (diff)
downloadlinux-85cb905d3c5ff6107f4948314731c1b55b689cfc.tar.bz2
ALSA: echoaduio: Drop superfluous volatile modifier
The dsp_registers field of struct echoaduio has the volatile modifier, but it's basically superfluous; the field is accessed only for the base pointer of readl() and writel(), hence marking with __iomem alone should suffice. OTOH, having the volatile prefix causes a compile warning like: sound/pci/echoaudio/echoaudio.c:1878:14: warning: passing argument 1 of 'iounmap' discards 'volatile' qualifier from pointer target type [-Wdiscarded-qualifiers] So it's better to drop this superfluous modifier. Link: https://lore.kernel.org/r/20200803143958.24324-1-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound')
-rw-r--r--sound/pci/echoaudio/echoaudio.c3
-rw-r--r--sound/pci/echoaudio/echoaudio.h2
2 files changed, 2 insertions, 3 deletions
diff --git a/sound/pci/echoaudio/echoaudio.c b/sound/pci/echoaudio/echoaudio.c
index 6aeb99aa2414..1b7a67ccabce 100644
--- a/sound/pci/echoaudio/echoaudio.c
+++ b/sound/pci/echoaudio/echoaudio.c
@@ -1950,8 +1950,7 @@ static int snd_echo_create(struct snd_card *card,
snd_echo_free(chip);
return -EBUSY;
}
- chip->dsp_registers = (volatile u32 __iomem *)
- ioremap(chip->dsp_registers_phys, sz);
+ chip->dsp_registers = ioremap(chip->dsp_registers_phys, sz);
if (!chip->dsp_registers) {
dev_err(chip->card->dev, "ioremap failed\n");
snd_echo_free(chip);
diff --git a/sound/pci/echoaudio/echoaudio.h b/sound/pci/echoaudio/echoaudio.h
index 30c640931f1e..0afe13f7b6e5 100644
--- a/sound/pci/echoaudio/echoaudio.h
+++ b/sound/pci/echoaudio/echoaudio.h
@@ -419,7 +419,7 @@ struct echoaudio {
short asic_code; /* Current ASIC code */
u32 comm_page_phys; /* Physical address of the
* memory seen by DSP */
- volatile u32 __iomem *dsp_registers; /* DSP's register base */
+ u32 __iomem *dsp_registers; /* DSP's register base */
u32 active_mask; /* Chs. active mask or
* punks out */
#ifdef CONFIG_PM_SLEEP