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authorRalf Baechle <ralf@linux-mips.org>2005-10-10 14:50:36 +0100
committerJeff Garzik <jgarzik@pobox.com>2005-10-18 18:03:47 -0400
commit04115def6ad7ef51440365b65a7324fcb82d5d1d (patch)
tree14e7113cad4264ec4cf6f26730437c293f182802 /drivers/net/sb1250-mac.c
parentf567ef935094003ee70ea3fd10f5695d349c0f48 (diff)
[PATCH] sb1250-mac: Ensure 16-byte alignment of the descriptor ring.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org> drivers/net/sb1250-mac.c | 9 ++++++++- 1 files changed, 8 insertions(+), 1 deletion(-) Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
Diffstat (limited to 'drivers/net/sb1250-mac.c')
-rw-r--r--drivers/net/sb1250-mac.c9
1 files changed, 8 insertions, 1 deletions
diff --git a/drivers/net/sb1250-mac.c b/drivers/net/sb1250-mac.c
index 0f828da0339..cb4ea415845 100644
--- a/drivers/net/sb1250-mac.c
+++ b/drivers/net/sb1250-mac.c
@@ -750,7 +750,14 @@ static void sbdma_initctx(sbmacdma_t *d,
d->sbdma_maxdescr = maxdescr;
d->sbdma_dscrtable = (sbdmadscr_t *)
- kmalloc(d->sbdma_maxdescr*sizeof(sbdmadscr_t), GFP_KERNEL);
+ kmalloc((d->sbdma_maxdescr+1)*sizeof(sbdmadscr_t), GFP_KERNEL);
+
+ /*
+ * The descriptor table must be aligned to at least 16 bytes or the
+ * MAC will corrupt it.
+ */
+ d->sbdma_dscrtable = (sbdmadscr_t *)
+ ALIGN((unsigned long)d->sbdma_dscrtable, sizeof(sbdmadscr_t));
memset(d->sbdma_dscrtable,0,d->sbdma_maxdescr*sizeof(sbdmadscr_t));