linux-kernel - Re: [patch 32/37] CRYPTO: api: scatterwalk_copychunks() fails to advance through scatterlist

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Message-ID: <20070331034513.GA926@gondor.apana.org.au>
Date:	Sat, 31 Mar 2007 13:45:13 +1000
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	Greg KH <gregkh@...e.de>
Cc:	Patrick McHardy <kaber@...sh.net>, linux-kernel@...r.kernel.org,
	stable@...nel.org, Justin Forbes <jmforbes@...uxtx.org>,
	Zwane Mwaikambo <zwane@....linux.org.uk>,
	Theodore Ts'o <tytso@....edu>,
	Randy Dunlap <rdunlap@...otime.net>,
	Dave Jones <davej@...hat.com>,
	Chuck Wolber <chuckw@...ntumlinux.com>,
	Chris Wedgwood <reviews@...cw.f00f.org>,
	Michael Krufky <mkrufky@...uxtv.org>,
	Chuck Ebbert <cebbert@...hat.com>,
	torvalds@...ux-foundation.org, akpm@...ux-foundation.org,
	alan@...rguk.ukuu.org.uk,
	"J. Bruce Fields" <bfields@...i.umich.edu>
Subject: Re: [patch 32/37] CRYPTO: api: scatterwalk_copychunks() fails to advance through scatterlist

On Fri, Mar 30, 2007 at 08:11:29PM -0700, Greg KH wrote:
> 
> Is this an "add-on" patch, or a replacement one?

This is an add-on.  In case you want a replacement, here it is:

Cheers,
-- 
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Email: Herbert Xu ~{PmV>HI~} <herbert@...dor.apana.org.au>
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--
diff --git a/crypto/scatterwalk.c b/crypto/scatterwalk.c
index 35172d3..0f76175 100644
--- a/crypto/scatterwalk.c
+++ b/crypto/scatterwalk.c
@@ -91,6 +91,8 @@ void scatterwalk_copychunks(void *buf, struct scatter_walk *walk,
 		memcpy_dir(buf, vaddr, len_this_page, out);
 		scatterwalk_unmap(vaddr, out);
 
+		scatterwalk_advance(walk, len_this_page);
+
 		if (nbytes == len_this_page)
 			break;
 
@@ -99,7 +101,5 @@ void scatterwalk_copychunks(void *buf, struct scatter_walk *walk,
 
 		scatterwalk_pagedone(walk, out, 1);
 	}
-
-	scatterwalk_advance(walk, nbytes);
 }
 EXPORT_SYMBOL_GPL(scatterwalk_copychunks);
-
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