+ rapidio-remove-unnecessary-use-of-list-iterator.patch added to -mm tree

+ rapidio-remove-unnecessary-use-of-list-iterator.patch added to -mm tree

[Andrew Morton]

The patch titled
     Subject: rapidio: remove unnecessary use of list iterator
has been added to the -mm tree.  Its filename is
     rapidio-remove-unnecessary-use-of-list-iterator.patch

This patch should soon appear at
    https://ozlabs.org/~akpm/mmots/broken-out/rapidio-remove-unnecessary-use-of-list-iterator.patch
and later at
    https://ozlabs.org/~akpm/mmotm/broken-out/rapidio-remove-unnecessary-use-of-list-iterator.patch

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------------------------------------------------------
From: Jakob Koschel <jakobkoschel@gmail.com>
Subject: rapidio: remove unnecessary use of list iterator

req->map is set in the valid case and always equals 'map' if the break was
hit.  It therefore is unnecessary to use the list iterator variable and
the use of 'map' can be replaced with req->map.

This is done in preparation to limit the scope of a list iterator to the
list traversal loop [1].

Link: https://lore.kernel.org/all/YhdfEIwI4EdtHdym@kroah.com/
Link: https://lkml.kernel.org/r/20220319203344.2547702-1-jakobkoschel@gmail.com
Signed-off-by: Jakob Koschel <jakobkoschel@gmail.com>
Reviewed-by: John Hubbard <jhubbard@nvidia.com>
Cc: Matt Porter <mporter@kernel.crashing.org>
Cc: Alexandre Bounine <alex.bou9@gmail.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: "Brian Johannesmeyer" <bjohannesmeyer@gmail.com>
Cc: Cristiano Giuffrida <c.giuffrida@vu.nl>
Cc: "Bos, H.J." <h.j.bos@vu.nl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 drivers/rapidio/devices/rio_mport_cdev.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/drivers/rapidio/devices/rio_mport_cdev.c~rapidio-remove-unnecessary-use-of-list-iterator
+++ a/drivers/rapidio/devices/rio_mport_cdev.c
@@ -915,7 +915,7 @@ rio_dma_transfer(struct file *filp, u32
 			goto err_req;
 		}
 
-		if (xfer->length + xfer->offset > map->size) {
+		if (xfer->length + xfer->offset > req->map->size) {
 			ret = -EINVAL;
 			goto err_req;
 		}
@@ -927,7 +927,7 @@ rio_dma_transfer(struct file *filp, u32
 		}
 
 		sg_set_buf(req->sgt.sgl,
-			   map->virt_addr + (baddr - map->phys_addr) +
+			   req->map->virt_addr + (baddr - req->map->phys_addr) +
 				xfer->offset, xfer->length);
 	}
 
_

Patches currently in -mm which might be from jakobkoschel@gmail.com are

ocfs2-replace-usage-of-found-with-dedicated-list-iterator-variable.patch
ocfs2-remove-usage-of-list-iterator-variable-after-the-loop-body.patch
rapidio-remove-unnecessary-use-of-list-iterator.patch