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rapidio: add handling of orphan port-write message

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Add check for access to port-write (PW) message source device before
processing the PW message.  If source RIO device is not available (power
down or RIO link failure) trace back to a last available switch/port on
the PW message route and service failure at that point.

Signed-off-by: Alexandre Bounine <alexandre.bounine@idt.com>
Cc: Thomas Moll <thomas.moll@sysgo.com>
Cc: Matt Porter <mporter@kernel.crashing.org>
Cc: Li Yang <leoli@freescale.com>
Cc: Kumar Gala <galak@kernel.crashing.org>
Cc: Micha Nelissen <micha@neli.hopto.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
2010-10-27 15:34:32 -07:00
committed by Linus Torvalds
parent ac38d7232d
commit 6429cd49f4
2 changed files with 110 additions and 5 deletions
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2
drivers/rapidio/rio.h
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@@ -14,6 +14,8 @@
#include <linux/list.h>
#include <linux/rio.h>
#define RIO_MAX_CHK_RETRY 3
/* Functions internal to the RIO core code */
extern u32 rio_mport_get_feature(struct rio_mport *mport, int local, u16 destid,