tree d15134080908344c9518d936b98a31f511aa4892
parent 4ca5218e3939685c2325fc0a0a1ac8150272c93f
author wwang <wei_wang@realsil.com.cn> 1332837791 +0800
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1334074696 -0700

staging:rts_pstor:Fix possible panic by NULL pointer dereference

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>