4.10-stable review patch. If anyone has any objections, please let me know.
------------------
From: Takashi Iwai <ti...@suse.de>
commit 15c75b09f8d190f89ab4db463b87d411ca349dfe upstream.
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")
Signed-off-by: Takashi Iwai <ti...@suse.de>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
sound/pci/ctxfi/cthw20k1.c | 19 ++++++-------------
sound/pci/ctxfi/cthw20k2.c | 19 ++++++-------------
2 files changed, 12 insertions(+), 26 deletions(-)
--- 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) {
--- 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) {
