| Message ID | 1416841624-8976-1-git-send-email-luis.henriques@canonical.com |
|---|---|
| State | New |
| Headers | show |
diff --git a/drivers/block/sunvdc.c b/drivers/block/sunvdc.c index 1616ad091a5e..1a9360da1f54 100644 --- a/drivers/block/sunvdc.c +++ b/drivers/block/sunvdc.c @@ -747,6 +747,10 @@ static int probe_disk(struct vdc_port *port) port->disk = g; + /* Each segment in a request is up to an aligned page in size. */ + blk_queue_segment_boundary(q, PAGE_SIZE - 1); + blk_queue_max_segment_size(q, PAGE_SIZE); + blk_queue_max_segments(q, port->ring_cookies); blk_queue_max_hw_sectors(q, port->max_xfer_size); g->major = vdc_major;
This is a note to let you know that I have just added a patch titled sunvdc: limit each sg segment to a page to the linux-3.16.y-queue branch of the 3.16.y-ckt extended stable tree which can be found at: http://kernel.ubuntu.com/git?p=ubuntu/linux.git;a=shortlog;h=refs/heads/linux-3.16.y-queue This patch is scheduled to be released in version 3.16.7-ckt2. If you, or anyone else, feels it should not be added to this tree, please reply to this email. For more information about the 3.16.y-ckt tree, see https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable Thanks. -Luis ------ From 21a3064f80655bd5b4a83c9267c2cff45f437d7b Mon Sep 17 00:00:00 2001 From: Dwight Engen <dwight.engen@oracle.com> Date: Fri, 19 Sep 2014 09:42:53 -0400 Subject: sunvdc: limit each sg segment to a page commit 5eed69ffd248c9f68f56c710caf07db134aef28b upstream. ldc_map_sg() could fail its check that the number of pages referred to by the sg scatterlist was <= the number of cookies. This fixes the issue by doing a similar thing to the xen-blkfront driver, ensuring that the scatterlist will only ever contain a segment count <= port->ring_cookies, and each segment will be page aligned, and <= page size. This ensures that the scatterlist is always mappable. Orabug: 19347817 OraBZ: 15945 Signed-off-by: Dwight Engen <dwight.engen@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Luis Henriques <luis.henriques@canonical.com> --- drivers/block/sunvdc.c | 4 ++++ 1 file changed, 4 insertions(+) -- 2.1.0