From: Christoph Hellwig <hch@lst.de>
To: Ulf Hansson <ulf.hansson@linaro.org>
Cc: Aaro Koskinen <aaro.koskinen@iki.fi>,
Nicolas Pitre <nico@fluxnic.net>,
linux-mmc@vger.kernel.org, Russell King <linux@armlinux.org.uk>,
linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org,
Ben Dooks <ben-linux@fluff.org>,
linux-omap@vger.kernel.org, linux-arm-kernel@lists.infradead.org
Subject: [PATCH 12/14] mmc: sh_mmcif: handle chained sglists
Date: Tue, 12 Feb 2019 08:25:26 +0100
Message-ID: <20190212072528.13167-13-hch@lst.de> (raw)
In-Reply-To: <20190212072528.13167-1-hch@lst.de>
Use the proper sg_next() helper to move to the next scatterlist element
to support chained scatterlists.
Signed-off-by: Christoph Hellwig <hch@lst.de>
---
drivers/mmc/host/sh_mmcif.c | 13 +++++--------
1 file changed, 5 insertions(+), 8 deletions(-)
diff --git a/drivers/mmc/host/sh_mmcif.c b/drivers/mmc/host/sh_mmcif.c
index 24c3f13bafdb..9e59dbe6ef30 100644
--- a/drivers/mmc/host/sh_mmcif.c
+++ b/drivers/mmc/host/sh_mmcif.c
@@ -234,7 +234,6 @@ struct sh_mmcif_host {
enum sh_mmcif_wait_for wait_for;
struct delayed_work timeout_work;
size_t blocksize;
- int sg_idx;
int sg_blkidx;
bool power;
bool ccs_enable; /* Command Completion Signal support */
@@ -606,13 +605,13 @@ static bool sh_mmcif_next_block(struct sh_mmcif_host *host)
if (host->sg_blkidx == data->sg->length) {
host->sg_blkidx = 0;
- if (++host->sg_idx < data->sg_len) {
- data->sg++;
- host->pio_offset = data->sg->offset / 4;
- }
+ data->sg = sg_next(data->sg);
+ if (!data->sg)
+ return false;
+ host->pio_offset = data->sg->offset / 4;
}
- return host->sg_idx != data->sg_len;
+ return true;
}
static void sh_mmcif_single_read(struct sh_mmcif_host *host,
@@ -665,7 +664,6 @@ static void sh_mmcif_multi_read(struct sh_mmcif_host *host,
BLOCK_SIZE_MASK;
host->wait_for = MMCIF_WAIT_FOR_MREAD;
- host->sg_idx = 0;
host->sg_blkidx = 0;
host->pio_offset = data->sg->offset / 4;
@@ -752,7 +750,6 @@ static void sh_mmcif_multi_write(struct sh_mmcif_host *host,
BLOCK_SIZE_MASK;
host->wait_for = MMCIF_WAIT_FOR_MWRITE;
- host->sg_idx = 0;
host->sg_blkidx = 0;
host->pio_offset = data->sg->offset / 4;
--
2.20.1
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Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-02-12 7:25 remove block layer bounce buffering for MMC v2 Christoph Hellwig
2019-02-12 7:25 ` [PATCH 01/14] scatterlist: add sg_kmap_atomic / sg_kunmap_atomic helpers Christoph Hellwig
2019-02-12 7:25 ` [PATCH 02/14] mmc: remove the unused use_blk_mq field from struct mmc_host Christoph Hellwig
2019-02-12 7:25 ` [PATCH 03/14] mmc: add a need_kmap flag to " Christoph Hellwig
2019-02-12 7:25 ` [PATCH 04/14] mmc: davinci: handle highmem pages Christoph Hellwig
2019-02-12 7:25 ` [PATCH 05/14] mmc: moxart: " Christoph Hellwig
2019-02-12 7:25 ` [PATCH 06/14] mmc: omap: " Christoph Hellwig
2019-02-12 18:39 ` Tony Lindgren
2019-02-12 7:25 ` [PATCH 07/14] mmc: omap: handle chained sglists Christoph Hellwig
2019-02-12 7:25 ` [PATCH 08/14] mmc: s3cmci: handle highmem pages Christoph Hellwig
2019-02-12 7:25 ` [PATCH 09/14] mmc: s3cmci: handle chained sglists Christoph Hellwig
2019-02-12 7:25 ` [PATCH 10/14] mmc: mvsdio: handle highmem pages Christoph Hellwig
2019-02-12 7:25 ` [PATCH 11/14] mmc: sh_mmcif: " Christoph Hellwig
2019-02-12 7:25 ` Christoph Hellwig [this message]
2019-02-12 7:25 ` [PATCH 13/14] mmc: core: don't use block layer bounce buffers Christoph Hellwig
2019-02-12 7:25 ` [PATCH 14/14] dma-mapping: remove dma_max_pfn Christoph Hellwig
2019-02-25 13:54 ` remove block layer bounce buffering for MMC v2 Ulf Hansson
2019-03-08 9:18 ` Christoph Hellwig
2019-03-08 9:43 ` Ulf Hansson
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