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| author | Takashi Iwai <tiwai@suse.de> | 2020-08-03 16:39:58 +0200 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2020-08-11 14:21:49 +0200 |
| commit | 85cb905d3c5ff6107f4948314731c1b55b689cfc (patch) | |
| tree | 529ced751eeac91fae6e89244d88786e64c1f3bf /sound/pci | |
| parent | ALSA: usb-audio: Disable Lenovo P620 Rear line-in volume control (diff) | |
| download | linux-85cb905d3c5ff6107f4948314731c1b55b689cfc.tar.xz linux-85cb905d3c5ff6107f4948314731c1b55b689cfc.zip | |
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/pci')
| -rw-r--r-- | sound/pci/echoaudio/echoaudio.c | 3 | ||||
| -rw-r--r-- | sound/pci/echoaudio/echoaudio.h | 2 |
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 |