[PATCH] Sync up ieee-1394

Lots of this patch is trivial code cleanups (static vars were being
intialized to 0, etc).

There's also some fixes for ISO transmits (max buffer handling).
Aswell, we have a few fixes to disable IRM capabilites correctly.  We've
also disabled, by default some generally unused EXPORT symbols for the
sake of cleanliness in the kernel.  However, instead of removing them
completely, we felt it necessary to have a config option that allowed
them to be enabled for the many projects outside of the main kernel tree
that use our API for driver development.

The primary reason for this patch is to revert a MODE6->MODE10 RBC
conversion patch from the SCSI maintainers.  The new conversions handled
directly in the scsi layer do not seem to work for SBP2.  This patch
reverts to our old working code so that users can enjoy using Firewire
disks and dvd drives again.

We are working with the SCSI maintainers to resolve this issue outside
of the main kernel tree.  We'll merge the patch once the SCSI layer's
handling of the MODE10 conversion is working for us.

Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 12 insertions, 1 deletions

diff --git a/drivers/ieee1394/iso.h b/drivers/ieee1394/iso.h
index fb654d9639a7..3efc60b33a88 100644
--- a/drivers/ieee1394/iso.h
+++ b/drivers/ieee1394/iso.h
@@ -47,6 +47,14 @@ struct hpsb_iso_packet_info {
         /* 2-bit 'tag' and 4-bit 'sy' fields of the isochronous header */
         __u8 tag;
         __u8 sy;
+
+        /*
+         * length in bytes of the packet including header/trailer.
+         * MUST be at structure end, since the first part of this structure is also 
+         * defined in raw1394.h (i.e. struct raw1394_iso_packet_info), is copied to 
+         * userspace and is accessed there through libraw1394. 
+         */
+        __u16 total_len;
 };
 
 enum hpsb_iso_type { HPSB_ISO_RECV = 0, HPSB_ISO_XMIT = 1 };
@@ -111,6 +119,9 @@ struct hpsb_iso {
         /* how many times the buffer has overflowed or underflowed */
         atomic_t overflows;
 
+        /* Current number of bytes lost in discarded packets */
+        int bytes_discarded;
+
         /* private flags to track initialization progress */
 #define HPSB_ISO_DRIVER_INIT     (1<<0)
 #define HPSB_ISO_DRIVER_STARTED  (1<<1)
@@ -193,7 +204,7 @@ void hpsb_iso_packet_sent(struct hpsb_iso *iso, int cycle, int error);
 
 /* call after a packet has been received (interrupt context OK) */
 void hpsb_iso_packet_received(struct hpsb_iso *iso, u32 offset, u16 len,
-                              u16 cycle, u8 channel, u8 tag, u8 sy);
+                              u16 total_len, u16 cycle, u8 channel, u8 tag, u8 sy);
 
 /* call to wake waiting processes after buffer space has opened up. */
 void hpsb_iso_wake(struct hpsb_iso *iso);