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authorJames Bottomley <James.Bottomley@HansenPartnership.com>2008-03-09 11:57:56 -0500
committerGreg Kroah-Hartman <gregkh@suse.de>2008-03-10 16:33:33 -0700
commite88a0c2ca81207a75afe5bbb8020541dabf606ac (patch)
treeb92a158720c3c6e3eb45380849bf14585b7c9d64
parentfbab976d7ce4556d4212d554f766dae461d22e16 (diff)
drivers: fix dma_get_required_mask
There's a bug in the current implementation of dma_get_required_mask() where it ands the returned mask with the current device mask. This rather defeats the purpose if you're using the call to determine what your mask should be (since you will at that time have the default DMA_32BIT_MASK). This bug results in any driver that uses this function *always* getting a 32 bit mask, which is wrong. Fix by removing the and with dev->dma_mask. Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com> Cc: stable <stable@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
-rw-r--r--drivers/base/platform.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/base/platform.c b/drivers/base/platform.c
index efaf282c438..911ec600fe7 100644
--- a/drivers/base/platform.c
+++ b/drivers/base/platform.c
@@ -648,7 +648,7 @@ u64 dma_get_required_mask(struct device *dev)
high_totalram += high_totalram - 1;
mask = (((u64)high_totalram) << 32) + 0xffffffff;
}
- return mask & *dev->dma_mask;
+ return mask;
}
EXPORT_SYMBOL_GPL(dma_get_required_mask);
#endif