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| author | Takashi Iwai <tiwai@suse.de> | 2017-02-28 17:16:48 +0100 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2017-02-28 17:58:02 +0100 |
| commit | 15c75b09f8d190f89ab4db463b87d411ca349dfe (patch) | |
| tree | 3b90b309806a1e53a341a0ef17be716a64944024 /sound/pci/ctxfi/cthw20k2.c | |
| parent | ALSA: timer: Reject user params with too small ticks (diff) | |
| download | linux-15c75b09f8d190f89ab4db463b87d411ca349dfe.tar.xz linux-15c75b09f8d190f89ab4db463b87d411ca349dfe.zip | |
ALSA: ctxfi: Fallback DMA mask to 32bit
Currently ctxfi driver tries to set only the 64bit DMA mask on 64bit
architectures, and bails out if it fails. This causes a problem on
some platforms since the 64bit DMA isn't always guaranteed. We should
fall back to the default 32bit DMA when 64bit DMA fails.
Fixes: 6d74b86d3c0f ("ALSA: ctxfi - Allow 64bit DMA")
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to '')
| -rw-r--r-- | sound/pci/ctxfi/cthw20k2.c | 19 |
1 files changed, 6 insertions, 13 deletions
diff --git a/sound/pci/ctxfi/cthw20k2.c b/sound/pci/ctxfi/cthw20k2.c index 6414ecf93efa..18ee7768b7c4 100644 --- a/sound/pci/ctxfi/cthw20k2.c +++ b/sound/pci/ctxfi/cthw20k2.c @@ -26,12 +26,6 @@ #include "cthw20k2.h" #include "ct20k2reg.h" -#if BITS_PER_LONG == 32 -#define CT_XFI_DMA_MASK DMA_BIT_MASK(32) /* 32 bit PTE */ -#else -#define CT_XFI_DMA_MASK DMA_BIT_MASK(64) /* 64 bit PTE */ -#endif - struct hw20k2 { struct hw hw; /* for i2c */ @@ -2029,19 +2023,18 @@ static int hw_card_start(struct hw *hw) int err = 0; struct pci_dev *pci = hw->pci; unsigned int gctl; + const unsigned int dma_bits = BITS_PER_LONG; err = pci_enable_device(pci); if (err < 0) return err; /* Set DMA transfer mask */ - if (dma_set_mask(&pci->dev, CT_XFI_DMA_MASK) < 0 || - dma_set_coherent_mask(&pci->dev, CT_XFI_DMA_MASK) < 0) { - dev_err(hw->card->dev, - "architecture does not support PCI busmaster DMA with mask 0x%llx\n", - CT_XFI_DMA_MASK); - err = -ENXIO; - goto error1; + if (!dma_set_mask(&pci->dev, DMA_BIT_MASK(dma_bits))) { + dma_set_coherent_mask(&pci->dev, DMA_BIT_MASK(dma_bits)); + } else { + dma_set_mask(&pci->dev, DMA_BIT_MASK(32)); + dma_set_coherent_mask(&pci->dev, DMA_BIT_MASK(32)); } if (!hw->io_base) { |