commit 3ae3d0d4ae4131563d9eb55859f4fa5bd39059bd
author Jody McIntyre <scjody@steamballoon.com> Fri Sep 30 11:59:18 2005 -0700
committer Linus Torvalds <torvalds@g5.osdl.org> Fri Sep 30 12:41:19 2005 -0700
tree ff2574f8b4191b99eaa1e14c2da15ad23ac2e785
parent 998150c3d3cf049da7596875f6fdc253db089a9a

[PATCH] eth1394: workaround limitation in rawiso routines

Work around limitation in rawiso routines.  Required with 1394b cards on
architectures where PAGE_SIZE is 4096.  Based on a previous patch by Ben
Collins.

Signed-off-by: Jody McIntyre <scjody@steamballoon.com>
Cc: Ben Collins <bcollins@debian.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

drivers/ieee1394/eth1394.h

diff --git a/drivers/ieee1394/eth1394.h b/drivers/ieee1394/eth1394.h
index ed8f1c4..a77213c 100644
--- a/drivers/ieee1394/eth1394.h
+++ b/drivers/ieee1394/eth1394.h
@@ -44,6 +44,12 @@
 
 #define ETHER1394_GASP_BUFFERS 16
 
+/* rawiso buffer size - due to a limitation in rawiso, we must limit each
+ * GASP buffer to be less than PAGE_SIZE. */
+#define ETHER1394_ISO_BUF_SIZE	ETHER1394_GASP_BUFFERS *                        \
+				   min((unsigned int)PAGE_SIZE,                 \
+				       2 * (1U << (priv->host->csr.max_rec + 1)))
+
 /* Node set == 64 */
 #define NODE_SET			(ALL_NODES + 1)