linux-kernel - [PATCH v2 10/16] mmc: block: Detect HPI support in card and host controller

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Date:	Thu, 3 May 2012 19:53:09 +0530
From:	Venkatraman S <svenkatr@...com>
To:	<linux-mmc@...r.kernel.org>, <cjb@...top.org>,
	<linux-mm@...ck.org>, <linux-fsdevel@...r.kernel.org>,
	<linux-omap@...r.kernel.org>
CC:	<linux-kernel@...r.kernel.org>, <arnd.bergmann@...aro.org>,
	<alex.lemberg@...disk.com>, <ilan.smith@...disk.com>,
	<lporzio@...ron.com>, <rmk+kernel@....linux.org.uk>,
	Venkatraman S <svenkatr@...com>
Subject: [PATCH v2 10/16] mmc: block: Detect HPI support in card and host controller

If both the card and host controller support HPI related
operations, set a flag in MMC queue to remember it.

Signed-off-by: Venkatraman S <svenkatr@...com>
---
 drivers/mmc/card/block.c |   12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/drivers/mmc/card/block.c b/drivers/mmc/card/block.c
index dabec55..11833e4 100644
--- a/drivers/mmc/card/block.c
+++ b/drivers/mmc/card/block.c
@@ -88,6 +88,7 @@ struct mmc_blk_data {
 	unsigned int	flags;
 #define MMC_BLK_CMD23	(1 << 0)	/* Can do SET_BLOCK_COUNT for multiblock */
 #define MMC_BLK_REL_WR	(1 << 1)	/* MMC Reliable write support */
+#define MMC_HPI_SUPPORT	(1 << 2)
 
 	unsigned int	usage;
 	unsigned int	read_only;
@@ -1548,12 +1549,15 @@ static struct mmc_blk_data *mmc_blk_alloc_req(struct mmc_card *card,
 			md->flags |= MMC_BLK_CMD23;
 	}
 
-	if (mmc_card_mmc(card) &&
-	    md->flags & MMC_BLK_CMD23 &&
+	if (mmc_card_mmc(card)) {
+		if (md->flags & MMC_BLK_CMD23 &&
 	    ((card->ext_csd.rel_param & EXT_CSD_WR_REL_PARAM_EN) ||
 	     card->ext_csd.rel_sectors)) {
-		md->flags |= MMC_BLK_REL_WR;
-		blk_queue_flush(md->queue.queue, REQ_FLUSH | REQ_FUA);
+			md->flags |= MMC_BLK_REL_WR;
+			blk_queue_flush(md->queue.queue, REQ_FLUSH | REQ_FUA);
+		}
+		if (card->host->ops->abort_req && card->ext_csd.hpi_en)
+			md->flags |= MMC_HPI_SUPPORT;
 	}
 
 	return md;
-- 
1.7.10.rc2

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