From: Rusty Russell <rusty@rustcorp.com.au>
Date: Fri, 11 Jan 2008 09:12:55 +0000 (+0100)
Subject: Don't blatt first element of prv in sg_chain()
X-Git-Tag: v2.6.24-rc8~46^2~3
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=b801a1e7dbca3f51d0a4b22a750ae257196002cb;p=karo-tx-linux.git

Don't blatt first element of prv in sg_chain()

I realize that sg chaining is a ploy to make the rest of the kernel
devs feel the pain of the SCSI subsystem.  But this was a little
unsubtle.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Acked-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
---

diff --git a/include/linux/scatterlist.h b/include/linux/scatterlist.h
index 416e000dfe81..e3ff21dbac53 100644
--- a/include/linux/scatterlist.h
+++ b/include/linux/scatterlist.h
@@ -191,8 +191,8 @@ static inline void sg_chain(struct scatterlist *prv, unsigned int prv_nents,
 	/*
 	 * offset and length are unused for chain entry.  Clear them.
 	 */
-	prv->offset = 0;
-	prv->length = 0;
+	prv[prv_nents - 1].offset = 0;
+	prv[prv_nents - 1].length = 0;
 
 	/*
 	 * Set lowest bit to indicate a link pointer, and make sure to clear