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-rw-r--r--drivers/md/bitmap.c22
1 files changed, 17 insertions, 5 deletions
diff --git a/drivers/md/bitmap.c b/drivers/md/bitmap.c
index ac89a5deaca..ab7c8e4a61f 100644
--- a/drivers/md/bitmap.c
+++ b/drivers/md/bitmap.c
@@ -208,16 +208,19 @@ static void bitmap_checkfree(struct bitmap *bitmap, unsigned long page)
208 */ 208 */
209 209
210/* IO operations when bitmap is stored near all superblocks */ 210/* IO operations when bitmap is stored near all superblocks */
211static struct page *read_sb_page(mddev_t *mddev, long offset, unsigned long index) 211static struct page *read_sb_page(mddev_t *mddev, long offset,
212 struct page *page,
213 unsigned long index, int size)
212{ 214{
213 /* choose a good rdev and read the page from there */ 215 /* choose a good rdev and read the page from there */
214 216
215 mdk_rdev_t *rdev; 217 mdk_rdev_t *rdev;
216 struct list_head *tmp; 218 struct list_head *tmp;
217 struct page *page = alloc_page(GFP_KERNEL);
218 sector_t target; 219 sector_t target;
219 220
220 if (!page) 221 if (!page)
222 page = alloc_page(GFP_KERNEL);
223 if (!page)
221 return ERR_PTR(-ENOMEM); 224 return ERR_PTR(-ENOMEM);
222 225
223 rdev_for_each(rdev, tmp, mddev) { 226 rdev_for_each(rdev, tmp, mddev) {
@@ -227,7 +230,9 @@ static struct page *read_sb_page(mddev_t *mddev, long offset, unsigned long inde
227 230
228 target = rdev->sb_start + offset + index * (PAGE_SIZE/512); 231 target = rdev->sb_start + offset + index * (PAGE_SIZE/512);
229 232
230 if (sync_page_io(rdev->bdev, target, PAGE_SIZE, page, READ)) { 233 if (sync_page_io(rdev->bdev, target,
234 roundup(size, bdev_hardsect_size(rdev->bdev)),
235 page, READ)) {
231 page->index = index; 236 page->index = index;
232 attach_page_buffers(page, NULL); /* so that free_buffer will 237 attach_page_buffers(page, NULL); /* so that free_buffer will
233 * quietly no-op */ 238 * quietly no-op */
@@ -544,7 +549,9 @@ static int bitmap_read_sb(struct bitmap *bitmap)
544 549
545 bitmap->sb_page = read_page(bitmap->file, 0, bitmap, bytes); 550 bitmap->sb_page = read_page(bitmap->file, 0, bitmap, bytes);
546 } else { 551 } else {
547 bitmap->sb_page = read_sb_page(bitmap->mddev, bitmap->offset, 0); 552 bitmap->sb_page = read_sb_page(bitmap->mddev, bitmap->offset,
553 NULL,
554 0, sizeof(bitmap_super_t));
548 } 555 }
549 if (IS_ERR(bitmap->sb_page)) { 556 if (IS_ERR(bitmap->sb_page)) {
550 err = PTR_ERR(bitmap->sb_page); 557 err = PTR_ERR(bitmap->sb_page);
@@ -957,11 +964,16 @@ static int bitmap_init_from_disk(struct bitmap *bitmap, sector_t start)
957 */ 964 */
958 page = bitmap->sb_page; 965 page = bitmap->sb_page;
959 offset = sizeof(bitmap_super_t); 966 offset = sizeof(bitmap_super_t);
967 read_sb_page(bitmap->mddev, bitmap->offset,
968 page,
969 index, count);
960 } else if (file) { 970 } else if (file) {
961 page = read_page(file, index, bitmap, count); 971 page = read_page(file, index, bitmap, count);
962 offset = 0; 972 offset = 0;
963 } else { 973 } else {
964 page = read_sb_page(bitmap->mddev, bitmap->offset, index); 974 page = read_sb_page(bitmap->mddev, bitmap->offset,
975 NULL,
976 index, count);
965 offset = 0; 977 offset = 0;
966 } 978 }
967 if (IS_ERR(page)) { /* read error */ 979 if (IS_ERR(page)) { /* read error */