linux-kernel - [RFC PATCH 09/11] mmc: block: Detect HPI support in card and host controller

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <1334730332-22244-10-git-send-email-svenkatr@ti.com>
Date:	Wed, 18 Apr 2012 11:55:30 +0530
From:	Venkatraman S <svenkatr@...com>
To:	<linux-kernel@...r.kernel.org>, <linux-mmc@...r.kernel.org>
CC:	<arnd.bergmann@...aro.org>, <cjb@...top.org>,
	<alex.limberg@...disk.com>, <ilan.smith@...disk.com>,
	<lporzio@...ron.com>, Venkatraman S <svenkatr@...com>
Subject: [RFC PATCH 09/11] 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

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/