linux-kernel - [PATCH] Add write verify on dataflash.

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Message-ID: <47BB2AE4.1000206@gandalf.sssup.it>
Date:	Tue, 19 Feb 2008 20:15:48 +0100
From:	michael <trimarchi@...dalf.sssup.it>
To:	linux-kernel@...r.kernel.org
CC:	linux-mtd@...ts.infradead.org
Subject: [PATCH] Add write verify on dataflash.

Add the write verification buffer to the dataflash. The
mtd_dataflash has the CONFIG_DATAFLASH_WRITE_VERIFY so
is better a change to Kconfig.

Signed-off-by: Michael Trimarchi <trimarchimichael@...oo.it>
---
 fs/jffs2/wbuf.c |   12 ++++++++++++
 1 files changed, 12 insertions(+), 0 deletions(-)

diff --git a/fs/jffs2/wbuf.c b/fs/jffs2/wbuf.c
index d1d4f27..ba49f19 100644
--- a/fs/jffs2/wbuf.c
+++ b/fs/jffs2/wbuf.c
@@ -1236,12 +1236,24 @@ int jffs2_dataflash_setup(struct jffs2_sb_info *c) {
        if (!c->wbuf)
                return -ENOMEM;

+#ifdef CONFIG_JFFS2_FS_WBUF_VERIFY
+       c->wbuf_verify = kmalloc(c->wbuf_pagesize, GFP_KERNEL);
+       if (!c->wbuf_verify) {
+               kfree(c->oobbuf);
+               kfree(c->wbuf);
+               return -ENOMEM;
+       }
+#endif
+
        printk(KERN_INFO "JFFS2 write-buffering enabled buffer (%d) 
erasesize (%d)\n", c->wbuf_pagesize, c->sector_size);

        return 0;
 }

 void jffs2_dataflash_cleanup(struct jffs2_sb_info *c) {
+#ifdef CONFIG_JFFS2_FS_WBUF_VERIFY
+       kfree(c->wbuf_verify);
+#endif
        kfree(c->wbuf);
 }

--
1.5.2.1.174.gcd03

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