From: James Bottomley <James.Bottomley@HansenPartnership.com>
To: Mikulas Patocka <mpatocka@redhat.com>
Cc: torvalds@linux-foundation.org, linux-scsi@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 3/4] BUG_ON on kernel misbehavior on A100U2W driver
Date: Tue, 15 Jul 2008 10:17:47 -0500 [thread overview]
Message-ID: <1216135067.3312.40.camel@localhost.localdomain> (raw)
In-Reply-To: <Pine.LNX.4.64.0807151012200.24544@devserv.devel.redhat.com>
On Tue, 2008-07-15 at 10:14 -0400, Mikulas Patocka wrote:
> With broken Sparc64 IOMMU accounting, the kernel submits larger requests
> then allowed. Better to crash on BUG than corrupt memory. This needs to be
> fixed in sparc64 code.
This analysis is correct ... and the reason we don't add driver work
arounds, so it really needs to be fixed in sparc, not worked around in
the driver.
James
next prev parent reply other threads:[~2008-07-15 15:17 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-07-15 14:11 [PATCH 1/4] Fix endianity in A100U2W SCSI driver Mikulas Patocka
2008-07-15 14:12 ` [PATCH 2/4] Add udelay to " Mikulas Patocka
2008-07-15 14:14 ` [PATCH 3/4] BUG_ON on kernel misbehavior on A100U2W driver Mikulas Patocka
2008-07-15 14:15 ` [PATCH 4/4] Don't crash on IOMMU overflow in " Mikulas Patocka
2008-07-15 21:19 ` Mikulas Patocka
2008-07-15 15:17 ` James Bottomley [this message]
2008-07-15 21:18 ` [PATCH 3/4] BUG_ON on kernel misbehavior on " Mikulas Patocka
2008-07-15 21:16 ` [PATCH 2/4] Add udelay to A100U2W SCSI driver Mikulas Patocka
2008-07-15 17:23 ` [PATCH 1/4] Fix endianity in " Linus Torvalds
2008-07-15 21:15 ` Mikulas Patocka
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