X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;f=block%2Fblk-barrier.c;h=6d88544b677fe8865922795ccac817d1d301954f;hb=99428ad0f665a5d5b245ab36cefb6b231d977e73;hp=21f5025c3945053d4b6cae40d5eac9b614b9a55b;hpb=c15227de132f1295f3db6b7df9079956b1020fd8;p=safe%2Fjmp%2Flinux-2.6

diff --git a/block/blk-barrier.c b/block/blk-barrier.c
index 21f5025..6d88544 100644
--- a/block/blk-barrier.c
+++ b/block/blk-barrier.c
@@ -5,6 +5,7 @@
 #include <linux/module.h>
 #include <linux/bio.h>
 #include <linux/blkdev.h>
+#include <linux/gfp.h>
 
 #include "blk.h"
 
@@ -385,6 +386,8 @@ int blkdev_issue_discard(struct block_device *bdev, sector_t sector,
 
 	while (nr_sects && !ret) {
 		unsigned int sector_size = q->limits.logical_block_size;
+		unsigned int max_discard_sectors =
+			min(q->limits.max_discard_sectors, UINT_MAX >> 9);
 
 		bio = bio_alloc(gfp_mask, 1);
 		if (!bio)
@@ -400,7 +403,7 @@ int blkdev_issue_discard(struct block_device *bdev, sector_t sector,
 		 * our current implementations need.  If we'll ever need
 		 * more the interface will need revisiting.
 		 */
-		page = alloc_page(GFP_KERNEL | __GFP_ZERO);
+		page = alloc_page(gfp_mask | __GFP_ZERO);
 		if (!page)
 			goto out_free_bio;
 		if (bio_add_pc_page(q, bio, page, sector_size, 0) < sector_size)
@@ -411,10 +414,10 @@ int blkdev_issue_discard(struct block_device *bdev, sector_t sector,
 		 * touch many more blocks on disk than the actual payload
 		 * length.
 		 */
-		if (nr_sects > queue_max_hw_sectors(q)) {
-			bio->bi_size = queue_max_hw_sectors(q) << 9;
-			nr_sects -= queue_max_hw_sectors(q);
-			sector += queue_max_hw_sectors(q);
+		if (nr_sects > max_discard_sectors) {
+			bio->bi_size = max_discard_sectors << 9;
+			nr_sects -= max_discard_sectors;
+			sector += max_discard_sectors;
 		} else {
 			bio->bi_size = nr_sects << 9;
 			nr_sects = 0;