Use the scatterlist iterators and remove direct indexing of the
scatterlist array.
This way allows us to pre-allocate one small scatterlist, which can be
chained with one runtime allocated scatterlist if the pre-allocated one
isn't enough for the whole request.
Cc: Kim Bradley <kim.jamie.brad...@gmail.com>
Cc: de...@driverdev.osuosl.org
Cc: Greg Kroah-Hartman <gre...@linuxfoundation.org>
Signed-off-by: Ming Lei <ming....@redhat.com>
---
drivers/staging/rts5208/rtsx_transport.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/staging/rts5208/rtsx_transport.c
b/drivers/staging/rts5208/rtsx_transport.c
index 8277d7895608..407c9079b052 100644
--- a/drivers/staging/rts5208/rtsx_transport.c
+++ b/drivers/staging/rts5208/rtsx_transport.c
@@ -63,6 +63,8 @@ unsigned int rtsx_stor_access_xfer_buf(unsigned char *buffer,
struct scatterlist *sg =
(struct scatterlist *)scsi_sglist(srb)
+ *index;
+ if (sg_is_chain(sg))
+ sg = sg_chain_ptr(sg);
/*
* This loop handles a single s-g list entry, which may
@@ -86,7 +88,7 @@ unsigned int rtsx_stor_access_xfer_buf(unsigned char *buffer,
/* Transfer continues to next s-g entry */
*offset = 0;
++*index;
- ++sg;
+ sg = sg_next(sg);
}
while (sglen > 0) {
--
2.20.1
