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ARM: 6024/1: bcmring: fix missing down on semaphore in dma.c 

Added missing down on the memMap->lock semaphore. Also fixed a return
statement so that we always exit with an up (i.e. early exit via return
is not allowed)

Signed-off-by: Leo Hao Chen <leochen@broadcom.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Leo Chen 2010-04-01 19:13:19 +01:00 committed by Russell King
parent 0fdf86754f
commit 76708ab839
1 changed files with 10 additions and 3 deletions
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13
arch/arm/mach-bcmring/dma.c
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@ -2221,11 +2221,15 @@ EXPORT_SYMBOL(dma_map_create_descriptor_ring);
int dma_unmap(DMA_MemMap_t *memMap, /* Stores state information about the map */
int dirtied /* non-zero if any of the pages were modified */
) {
int rc = 0;
int regionIdx;
int segmentIdx;
DMA_Region_t *region;
DMA_Segment_t *segment;
down(&memMap->lock);
for (regionIdx = 0; regionIdx < memMap->numRegionsUsed; regionIdx++) {
region = &memMap->region[regionIdx];
@ -2239,7 +2243,8 @@ int dma_unmap(DMA_MemMap_t *memMap, /* Stores state information about the map */
printk(KERN_ERR
"%s: vmalloc'd pages are not yet supported\n",
__func__);
return -EINVAL;
rc = -EINVAL;
goto out;
}
case DMA_MEM_TYPE_KMALLOC:
@ -2276,7 +2281,8 @@ int dma_unmap(DMA_MemMap_t *memMap, /* Stores state information about the map */
printk(KERN_ERR
"%s: Unsupported memory type: %d\n",
__func__, region->memType);
return -EINVAL;
rc = -EINVAL;
goto out;
}
}
@ -2314,9 +2320,10 @@ int dma_unmap(DMA_MemMap_t *memMap, /* Stores state information about the map */
memMap->numRegionsUsed = 0;
memMap->inUse = 0;
out:
up(&memMap->lock);
return 0;
return rc;
}
EXPORT_SYMBOL(dma_unmap);