From: Jens Axboe <jens.axboe@oracle.com>
To: Benny Halevy <bhalevy@panasas.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: [PATCH 8/12] x86-64: update iommu/dma mapping functions to sg helpers
Date: Mon, 21 May 2007 08:32:49 +0200 [thread overview]
Message-ID: <20070521063249.GE14746@kernel.dk> (raw)
In-Reply-To: <464322BC.50101@panasas.com>
On Thu, May 10 2007, Benny Halevy wrote:
> @@ -411,12 +406,13 @@ int gart_map_sg(struct device *dev, struct scatterlist *sg, int nents, int dir)
> boundary and the new one doesn't have an offset. */
> if (!iommu_merge || !nextneed || !need || s->offset ||
> (ps->offset + ps->length) % PAGE_SIZE) {
> - if (dma_map_cont(sg, start, i, sg+out, pages,
> - need) < 0)
> + if (dma_map_cont(start_sg, i - start, sg+out,
> + pages, need) < 0)
> goto error;
> out++;
> pages = 0;
> - start = i;
> + start = i;
> + start_sg = s;
> }
> }
>
> @@ -424,7 +420,7 @@ int gart_map_sg(struct device *dev, struct scatterlist *sg, int nents, int dir)
> pages += to_pages(s->offset, s->length);
> ps = s;
> }
> - if (dma_map_cont(sg, start, i, sg+out, pages, need) < 0)
> + if (dma_map_cont(start_sg, i - start, sg+out, pages, need) < 0)
> goto error;
> out++;
> flush_gart();
Your patch is (very) buggy, the whole premise of doing chained sg
entries makes sg + int illegal!
--
Jens Axboe
next prev parent reply other threads:[~2007-05-21 6:33 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-05-10 11:40 [PATCH 0/12] Chaining sg lists for bio IO commands v4 Jens Axboe
2007-05-10 11:40 ` [PATCH 1/12] crypto: don't pollute the global namespace with sg_next() Jens Axboe
2007-05-10 13:55 ` Benny Halevy
2007-05-10 21:37 ` Jens Axboe
2007-05-11 5:20 ` Benny Halevy
2007-05-12 2:34 ` Herbert Xu
2007-05-10 11:40 ` [PATCH 2/12] Add sg helpers for iterating over a scatterlist table Jens Axboe
2007-05-10 11:40 ` [PATCH 3/12] libata: convert to using sg helpers Jens Axboe
2007-05-10 11:40 ` [PATCH 4/12] block: " Jens Axboe
2007-05-10 11:40 ` [PATCH 5/12] scsi: " Jens Axboe
2007-05-10 11:40 ` [PATCH 6/12] i386 dma_map_sg: " Jens Axboe
2007-05-10 11:40 ` [PATCH 7/12] i386 sg: add support for chaining scatterlists Jens Axboe
2007-05-10 13:00 ` Satyam Sharma
2007-05-10 13:23 ` Satyam Sharma
2007-05-10 11:40 ` [PATCH 8/12] x86-64: update iommu/dma mapping functions to sg helpers Jens Axboe
2007-05-10 13:48 ` Benny Halevy
2007-05-10 21:38 ` Jens Axboe
2007-05-21 6:32 ` Jens Axboe [this message]
2007-05-21 7:09 ` Benny Halevy
2007-05-21 7:13 ` Jens Axboe
2007-05-10 11:40 ` [PATCH 9/12] x86-64: enable sg chaining Jens Axboe
2007-05-10 11:40 ` [PATCH 10/12] scsi: simplify scsi_free_sgtable() Jens Axboe
2007-05-10 11:40 ` [PATCH 11/12] SCSI: support for allocating large scatterlists Jens Axboe
2007-05-10 11:40 ` [PATCH 12/12] ll_rw_blk: temporarily enable max_segments tweaking Jens Axboe
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