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Diffstat (limited to 'fs/block_dev.c')
-rw-r--r--fs/block_dev.c15
1 files changed, 9 insertions, 6 deletions
diff --git a/fs/block_dev.c b/fs/block_dev.c
index 95f786ec7f08..b07f1da1de4e 100644
--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -971,7 +971,7 @@ static void flush_disk(struct block_device *bdev, bool kill_dirty)
971 971
972 if (!bdev->bd_disk) 972 if (!bdev->bd_disk)
973 return; 973 return;
974 if (disk_partitionable(bdev->bd_disk)) 974 if (disk_part_scan_enabled(bdev->bd_disk))
975 bdev->bd_invalidated = 1; 975 bdev->bd_invalidated = 1;
976} 976}
977 977
@@ -1085,6 +1085,7 @@ static int __blkdev_put(struct block_device *bdev, fmode_t mode, int for_part);
1085static int __blkdev_get(struct block_device *bdev, fmode_t mode, int for_part) 1085static int __blkdev_get(struct block_device *bdev, fmode_t mode, int for_part)
1086{ 1086{
1087 struct gendisk *disk; 1087 struct gendisk *disk;
1088 struct module *owner;
1088 int ret; 1089 int ret;
1089 int partno; 1090 int partno;
1090 int perm = 0; 1091 int perm = 0;
@@ -1110,6 +1111,7 @@ static int __blkdev_get(struct block_device *bdev, fmode_t mode, int for_part)
1110 disk = get_gendisk(bdev->bd_dev, &partno); 1111 disk = get_gendisk(bdev->bd_dev, &partno);
1111 if (!disk) 1112 if (!disk)
1112 goto out; 1113 goto out;
1114 owner = disk->fops->owner;
1113 1115
1114 disk_block_events(disk); 1116 disk_block_events(disk);
1115 mutex_lock_nested(&bdev->bd_mutex, for_part); 1117 mutex_lock_nested(&bdev->bd_mutex, for_part);
@@ -1137,8 +1139,8 @@ static int __blkdev_get(struct block_device *bdev, fmode_t mode, int for_part)
1137 bdev->bd_disk = NULL; 1139 bdev->bd_disk = NULL;
1138 mutex_unlock(&bdev->bd_mutex); 1140 mutex_unlock(&bdev->bd_mutex);
1139 disk_unblock_events(disk); 1141 disk_unblock_events(disk);
1140 module_put(disk->fops->owner);
1141 put_disk(disk); 1142 put_disk(disk);
1143 module_put(owner);
1142 goto restart; 1144 goto restart;
1143 } 1145 }
1144 } 1146 }
@@ -1194,8 +1196,8 @@ static int __blkdev_get(struct block_device *bdev, fmode_t mode, int for_part)
1194 goto out_unlock_bdev; 1196 goto out_unlock_bdev;
1195 } 1197 }
1196 /* only one opener holds refs to the module and disk */ 1198 /* only one opener holds refs to the module and disk */
1197 module_put(disk->fops->owner);
1198 put_disk(disk); 1199 put_disk(disk);
1200 module_put(owner);
1199 } 1201 }
1200 bdev->bd_openers++; 1202 bdev->bd_openers++;
1201 if (for_part) 1203 if (for_part)
@@ -1215,8 +1217,8 @@ static int __blkdev_get(struct block_device *bdev, fmode_t mode, int for_part)
1215 out_unlock_bdev: 1217 out_unlock_bdev:
1216 mutex_unlock(&bdev->bd_mutex); 1218 mutex_unlock(&bdev->bd_mutex);
1217 disk_unblock_events(disk); 1219 disk_unblock_events(disk);
1218 module_put(disk->fops->owner);
1219 put_disk(disk); 1220 put_disk(disk);
1221 module_put(owner);
1220 out: 1222 out:
1221 bdput(bdev); 1223 bdput(bdev);
1222 1224
@@ -1442,14 +1444,15 @@ static int __blkdev_put(struct block_device *bdev, fmode_t mode, int for_part)
1442 if (!bdev->bd_openers) { 1444 if (!bdev->bd_openers) {
1443 struct module *owner = disk->fops->owner; 1445 struct module *owner = disk->fops->owner;
1444 1446
1445 put_disk(disk);
1446 module_put(owner);
1447 disk_put_part(bdev->bd_part); 1447 disk_put_part(bdev->bd_part);
1448 bdev->bd_part = NULL; 1448 bdev->bd_part = NULL;
1449 bdev->bd_disk = NULL; 1449 bdev->bd_disk = NULL;
1450 if (bdev != bdev->bd_contains) 1450 if (bdev != bdev->bd_contains)
1451 victim = bdev->bd_contains; 1451 victim = bdev->bd_contains;
1452 bdev->bd_contains = NULL; 1452 bdev->bd_contains = NULL;
1453
1454 put_disk(disk);
1455 module_put(owner);
1453 } 1456 }
1454 mutex_unlock(&bdev->bd_mutex); 1457 mutex_unlock(&bdev->bd_mutex);
1455 bdput(bdev); 1458 bdput(bdev);