linux-kernel - [PATCH 1/1] driver:mtd:spi-nor:fix spi_nor

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>] [day] [month] [year] [list]

Message-ID: <A765B125120D1346A63912DDE6D8B6315E6272@NTXXIAMBX02.xacn.micron.com>
Date:	Mon, 13 Oct 2014 05:53:11 +0000
From:	bpqw <bpqw@...ron.com>
To:	Marek Vasut <marex@...x.de>,
	"dwmw2@...radead.org" <dwmw2@...radead.org>,
	Brian Norris <computersforpeace@...il.com>
CC:	"shijie8@...il.com" <shijie8@...il.com>,
	"geert+renesas@...der.be" <geert+renesas@...der.be>,
	"grmoore@...era.com" <grmoore@...era.com>,
	"linux-mtd@...ts.infradead.org" <linux-mtd@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: [PATCH 1/1] driver:mtd:spi-nor:fix spi_nor_scan overwrite platform
 ID point

This patch used to modify the method of spi_nor_scan overwrite platform Id.

If type of platform data match with the name of spi_nor_ids set,
and JEDEC ID also match with INFO ID of spi_nor_ids set,spi device
ID point(this is before probed according to device name) shouldn't be
overwrote.Otherwise,this point will be overwrote by new spi_nor_ids
set point that probed according to JEDEC ID.

Signed-off-by: bean huo <beanhuo@...ron.com>
---
 drivers/mtd/spi-nor/spi-nor.c |   19 ++++++++++++-------
 1 file changed, 12 insertions(+), 7 deletions(-)

diff --git a/drivers/mtd/spi-nor/spi-nor.c b/drivers/mtd/spi-nor/spi-nor.c
index b5ad6be..3675503 100644
--- a/drivers/mtd/spi-nor/spi-nor.c
+++ b/drivers/mtd/spi-nor/spi-nor.c
@@ -963,16 +963,21 @@ int spi_nor_scan(struct spi_nor *nor, const struct spi_device_id *id,
 			return PTR_ERR(jid);
 		} else if (jid != id) {
 			/*
-			 * JEDEC knows better, so overwrite platform ID. We
-			 * can't trust partitions any longer, but we'll let
-			 * mtd apply them anyway, since some partitions may be
-			 * marked read-only, and we don't want to lose that
-			 * information, even if it's not 100% accurate.
+			 * If type of platform data match with the name of
+			 * spi_nor_ids set,and JEDEC ID also match with
+			 * INFO ID of spi_nor_ids set,shouldn't overwrite
+			 * spi device info point.Otherwise,will overwrite
+			 * it.
 			 */
-			dev_warn(dev, "found %s, expected %s\n",
-				 jid->name, id->name);
+			struct flash_info *tmpinfo;
+
+			tmpinfo = (void *)jid->driver_data;
+			if (tmpinfo->jedec_id != info->jedec_id) {
+				dev_warn(dev, "found %s, expected %s\n",
+						jid->name, id->name);
 			id = jid;
 			info = (void *)jid->driver_data;
+			}
 		}
 	}
 
-- 
1.7.9.5
--
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/