From: Chuanxiao Dong <chuanxiao.dong@intel.com>
To: linux-mmc@vger.kernel.org
Cc: linux-kernel@vger.kernel.org, akpm@linux-foundation.org,
cjb@laptop.org, kmpark@infradead.org, leonard.mai@intel.com
Subject: [PATCH v5 4/4]do HW reset after each read/write/erase if need
Date: Thu, 9 Dec 2010 20:25:03 +0800 [thread overview]
Message-ID: <20101209122503.GE13236@intel.com> (raw)
Driver can do a HW reset for eMMC card if read/write/erase
occurs timeout error.
Signed-off-by: Chuanxiao Dong <chuanxiao.dong@intel.com>
---
drivers/mmc/card/block.c | 10 ++++++++++
drivers/mmc/core/core.c | 2 ++
2 files changed, 12 insertions(+), 0 deletions(-)
diff --git a/drivers/mmc/card/block.c b/drivers/mmc/card/block.c
index 217f820..c50f94b 100644
--- a/drivers/mmc/card/block.c
+++ b/drivers/mmc/card/block.c
@@ -424,6 +424,16 @@ static int mmc_blk_issue_rw_rq(struct mmc_queue *mq, struct request *req)
mmc_wait_for_req(card->host, &brq.mrq);
+ /*
+ * Check if need to do HW reset.
+ */
+ if (brq.cmd.error)
+ mmc_handle_timeout_error(card->host, brq.cmd.error);
+ else if (brq.data.error)
+ mmc_handle_timeout_error(card->host, brq.data.error);
+ else if (brq.stop.error)
+ mmc_handle_timeout_error(card->host, brq.stop.error);
+
mmc_queue_bounce_post(mq);
/*
diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
index 530fc35..731399e 100644
--- a/drivers/mmc/core/core.c
+++ b/drivers/mmc/core/core.c
@@ -1385,6 +1385,8 @@ static int mmc_do_erase(struct mmc_card *card, unsigned int from,
if (err) {
printk(KERN_ERR "mmc_erase: erase error %d, status %#x\n",
err, cmd.resp[0]);
+ /* Before return, check whether can do a HW reset */
+ mmc_handle_timeout_error(card->host, cmd.error);
err = -EIO;
goto out;
}
--
1.6.6.1
reply other threads:[~2010-12-09 12:28 UTC|newest]
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