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 --- sound/pci/ctxfi/cthw20k1.c | 19 ++++++------------- sound/pci/ctxfi/cthw20k2.c | 19 ++++++------------- 2 files changed, 12 insertions(+), 26 deletions(-)

diff --git a/sound/pci/ctxfi/cthw20k1.c b/sound/pci/ctxfi/cthw20k1.c index 9667cbfb0ca2..ab4cdab5cfa5 100644 --- a/sound/pci/ctxfi/cthw20k1.c +++ b/sound/pci/ctxfi/cthw20k1.c @@ -27,12 +27,6 @@ #include "cthw20k1.h" #include "ct20k1reg.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 hw20k1 { struct hw hw; spinlock_t reg_20k1_lock; @@ -1904,19 +1898,18 @@ static int hw_card_start(struct hw *hw) { int err; struct pci_dev *pci = hw->pci; + 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) { 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) {