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authorJody McIntyre <scjody@steamballoon.com>2005-09-30 11:59:18 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2005-09-30 12:41:19 -0700
commit3ae3d0d4ae4131563d9eb55859f4fa5bd39059bd (patch)
treeff2574f8b4191b99eaa1e14c2da15ad23ac2e785 /drivers/ieee1394/eth1394.h
parent998150c3d3cf049da7596875f6fdc253db089a9a (diff)
[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>
Diffstat (limited to 'drivers/ieee1394/eth1394.h')
-rw-r--r--drivers/ieee1394/eth1394.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/ieee1394/eth1394.h b/drivers/ieee1394/eth1394.h
index ed8f1c4b7fd..a77213cfc48 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)