From: wwang <wei_wang@realsil.com.cn>
Date: Tue, 27 Mar 2012 08:43:11 +0000 (+0800)
Subject: staging:rts_pstor:Fix possible panic by NULL pointer dereference
X-Git-Tag: v3.2.22~31
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c4a08668a15a03370b3ba7cae49d1017f2c8434d;p=pandora-kernel.git

staging:rts_pstor:Fix possible panic by NULL pointer dereference

commit 0d05568ac79bfc595f1eadc3e0fd7a20a45f7b69 upstream.

rtsx_transport.c (rtsx_transfer_sglist_adma_partial):
pointer struct scatterlist *sg, which is mapped in dma_map_sg,
is used as an iterator in later transfer operation. It is corrupted and
passed to dma_unmap_sg, thus causing fatal unmap of some erroneous address.
Fix it by duplicating *sg_ptr for iterating.

Signed-off-by: wwang <wei_wang@realsil.com.cn>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---

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