From: Russell King <rmk@arm.linux.org.uk>
To: Qin Dehua <qindehua@gmail.com>
Cc: Dan Williams <dan.j.williams@intel.com>,
linux-kernel@vger.kernel.org, santosh.shilimkar@ti.com,
neilb@suse.de
Subject: Re: PROBLEM: ARM-dma-mapping-fix-for-speculative-prefetching cause OOPS
Date: Thu, 7 Jul 2011 10:39:28 +0100 [thread overview]
Message-ID: <20110707093928.GA15325@flint.arm.linux.org.uk> (raw)
In-Reply-To: <BANLkTimupUqpLDdDvMRjB+Js0xW59MTOQA@mail.gmail.com>
On Fri, Jul 01, 2011 at 12:54:09PM +0800, Qin Dehua wrote:
> The followings are messages of the three tests:
> ====== RUN 1 ======
> kernel BUG at drivers/md/raid5.c:3978!
So they are BUG_ON()s after all...
Could you try commenting out:
+ if (dir != DMA_TO_DEVICE)
+ outer_inv_range(paddr, paddr + size);
in ___dma_page_dev_to_cpu and:
+ if (dir != DMA_TO_DEVICE) {
+ unsigned long paddr = __pa(kaddr);
+ outer_inv_range(paddr, paddr + size);
+ }
in ___dma_single_dev_to_cpu please - and put a BUG_ON(dir == DMA_BIDIRECTIONAL)
in their place (because that won't be handled correctly with that change.)
Thanks.
--
Russell King
Linux kernel 2.6 ARM Linux - http://www.arm.linux.org.uk/
maintainer of:
next prev parent reply other threads:[~2011-07-07 9:39 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-06-30 4:09 PROBLEM: ARM-dma-mapping-fix-for-speculative-prefetching cause OOPS Qin Dehua
2011-06-30 7:43 ` Russell King
2011-06-30 11:16 ` Qin Dehua
2011-06-30 11:28 ` Russell King
2011-06-30 18:02 ` Dan Williams
2011-07-01 4:54 ` Qin Dehua
2011-07-07 9:39 ` Russell King [this message]
2011-07-08 4:38 ` Qin Dehua
2011-07-08 8:07 ` Russell King
2011-07-08 17:32 ` Russell King
2011-07-08 20:13 ` Dan Williams
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