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b43legacy: Remove switch statement with 64-bit index

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The gcc 3.4 fork used to compile the MN10300 port emits unwanted
__ucmpdi2() calls for switch statements that use a 64bit value.

This patch removes such a switch from b43legacy, and makes the code
more like that used in b43. Thanks to Adrian Bunk <bunk@kernel.org>
for reporting the problem.

Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Larry Finger 2008-07-04 08:39:01 -05:00 committed by John W. Linville
parent ae73e58ea6
commit 70197ede33
1 changed files with 51 additions and 15 deletions
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66
drivers/net/wireless/b43legacy/dma.c
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@ -859,6 +859,18 @@ static u64 supported_dma_mask(struct b43legacy_wldev *dev)
return DMA_30BIT_MASK;
}
static enum b43legacy_dmatype dma_mask_to_engine_type(u64 dmamask)
{
if (dmamask == DMA_30BIT_MASK)
return B43legacy_DMA_30BIT;
if (dmamask == DMA_32BIT_MASK)
return B43legacy_DMA_32BIT;
if (dmamask == DMA_64BIT_MASK)
return B43legacy_DMA_64BIT;
B43legacy_WARN_ON(1);
return B43legacy_DMA_30BIT;
}
/* Main initialization function. */
static
struct b43legacy_dmaring *b43legacy_setup_dmaring(struct b43legacy_wldev *dev,
@ -1018,6 +1030,43 @@ void b43legacy_dma_free(struct b43legacy_wldev *dev)
dma->tx_ring0 = NULL;
}
static int b43legacy_dma_set_mask(struct b43legacy_wldev *dev, u64 mask)
{
u64 orig_mask = mask;
bool fallback = 0;
int err;
/* Try to set the DMA mask. If it fails, try falling back to a
* lower mask, as we can always also support a lower one. */
while (1) {
err = ssb_dma_set_mask(dev->dev, mask);
if (!err)
break;
if (mask == DMA_64BIT_MASK) {
mask = DMA_32BIT_MASK;
fallback = 1;
continue;
}
if (mask == DMA_32BIT_MASK) {
mask = DMA_30BIT_MASK;
fallback = 1;
continue;
}
b43legacyerr(dev->wl, "The machine/kernel does not support "
"the required %u-bit DMA mask\n",
(unsigned int)dma_mask_to_engine_type(orig_mask));
return -EOPNOTSUPP;
}
if (fallback) {
b43legacyinfo(dev->wl, "DMA mask fallback from %u-bit to %u-"
"bit\n",
(unsigned int)dma_mask_to_engine_type(orig_mask),
(unsigned int)dma_mask_to_engine_type(mask));
}
return 0;
}
int b43legacy_dma_init(struct b43legacy_wldev *dev)
{
struct b43legacy_dma *dma = &dev->dma;
@ -1027,21 +1076,8 @@ int b43legacy_dma_init(struct b43legacy_wldev *dev)
enum b43legacy_dmatype type;
dmamask = supported_dma_mask(dev);
switch (dmamask) {
default:
B43legacy_WARN_ON(1);
case DMA_30BIT_MASK:
type = B43legacy_DMA_30BIT;
break;
case DMA_32BIT_MASK:
type = B43legacy_DMA_32BIT;
break;
case DMA_64BIT_MASK:
type = B43legacy_DMA_64BIT;
break;
}
err = ssb_dma_set_mask(dev->dev, dmamask);
type = dma_mask_to_engine_type(dmamask);
err = b43legacy_dma_set_mask(dev, dmamask);
if (err) {
#ifdef CONFIG_B43LEGACY_PIO
b43legacywarn(dev->wl, "DMA for this device not supported. "