Messages in this thread Patch in this message | | | Date | Thu, 23 Aug 2007 15:26:04 -0700 | From | Greg KH <> | Subject | [patch 04/28] uml: fix previous request size limit fix |
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-stable review patch. If anyone has any objections, please let us know.
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From: Jeff Dike <jdike@addtoit.com>
The previous patch which limited the number of sectors in a single request to a COWed device was correct in concept, but the limit was implemented in the wrong place.
By putting it in ubd_add, it covered the cases where the COWing was specified on the command line. However, when the command line only has the COW file specified, the fact that it's a COW file isn't known until it's opened, so the limit is missed in these cases.
This patch moves the sector limit from ubd_add to ubd_open_dev.
Signed-off-by: Jeff Dike <jdike@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
--- arch/um/drivers/ubd_kern.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
--- a/arch/um/drivers/ubd_kern.c +++ b/arch/um/drivers/ubd_kern.c @@ -612,6 +612,8 @@ static int ubd_open_dev(struct ubd *ubd_ ubd_dev->fd = fd; if(ubd_dev->cow.file != NULL){ + blk_queue_max_sectors(ubd_dev->queue, 8 * sizeof(long)); + err = -ENOMEM; ubd_dev->cow.bitmap = (void *) vmalloc(ubd_dev->cow.bitmap_len); if(ubd_dev->cow.bitmap == NULL){ @@ -712,8 +714,6 @@ static int ubd_add(int n, char **error_o ubd_dev->queue->queuedata = ubd_dev; blk_queue_max_hw_segments(ubd_dev->queue, MAX_SG); - if(ubd_dev->cow.file != NULL) - blk_queue_max_sectors(ubd_dev->queue, 8 * sizeof(long)); err = ubd_disk_register(MAJOR_NR, ubd_dev->size, n, &ubd_gendisk[n]); if(err){ *error_out = "Failed to register device"; -- - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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