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[PATCH] rapidio: fix multi-switch enumeration

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This patch contains two fixes for RapisIO enumeration logic:

1. Fix enumeration in configurations with multiple switches. The patch adds:

   a. Enumeration of an empty switch.  Empty switch is a switch that
      does not have any endpoint devices attached to it (except host device
      or previous switch in a chain).  New code assigns a phony destination
      ID associated with the switch and sets up corresponding routes.

   b. Adds a second pass to the enumeration to setup routes to
      devices discovered after switch was scanned.

2. Fix enumeration failure when riohdid parameter has non-zero value.
   Current version fails to setup response path to the host when it has
   destination ID other that 0.

Signed-off-by: Alexandre Bounine <alexandreb@tundra.com>
Acked-by: Matt Porter <mporter@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Alexandre Bounine
2007-02-10 01:46:47 -08:00
committed by Linus Torvalds
parent d5698c28b6
commit c70555b051
2 changed files with 88 additions and 31 deletions
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1
include/linux/rio.h
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@ -25,6 +25,7 @@
#define RIO_ANY_DESTID 0xff
#define RIO_NO_HOPCOUNT -1
#define RIO_INVALID_DESTID 0xffff
#define RIO_MAX_MPORT_RESOURCES 16
#define RIO_MAX_DEV_RESOURCES 16