Date: Fri, 29 Jul 2011 20:35:23 +0000 (UTC) From: Alexander Motin <mav@FreeBSD.org> To: cvs-src-old@freebsd.org Subject: cvs commit: src/sys/dev/ahci ahci.c ahci.h Message-ID: <201107292035.p6TKZflp091630@repoman.freebsd.org>
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mav 2011-07-29 20:35:23 UTC
FreeBSD src repository
Modified files:
sys/dev/ahci ahci.c ahci.h
Log:
SVN rev 224498 on 2011-07-29 20:35:23Z by mav
In some cases, at least on Marvell 88SE912x controllers, Current Command
Slot field of the PxCMD register may point to an empty command slot.
That breaks command timeout detection logic, making impossible to find
what command actually caused timeout, and leading to infinite wait.
Workaround that by checking whether pointed command slot is really used
and can timeout in its time. And if not, fallback to the dumb algorithm
used with FBS -- let all commands to time out and then fail all of them.
Approved by: re (kib)
MFC after: 1 week
Revision Changes Path
1.72 +14 -6 src/sys/dev/ahci/ahci.c
1.19 +1 -0 src/sys/dev/ahci/ahci.h
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