Commit 42fb2807d9886e485652e7512398b9d5a83bd768
1 parent
c2b3b41a
bdrv_write should not stop on partial write (Gleb Natapov)
Should return real error instead. Signed-off-by: Gleb Natapov <gleb@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6323 c046a42c-6fe2-441c-8c8c-71466251a162
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14 additions
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13 deletions
block.c
| ... | ... | @@ -565,21 +565,22 @@ int bdrv_write(BlockDriverState *bs, int64_t sector_num, |
| 565 | 565 | if (bs->read_only) |
| 566 | 566 | return -EACCES; |
| 567 | 567 | if (drv->bdrv_pwrite) { |
| 568 | - int ret, len; | |
| 568 | + int ret, len, count = 0; | |
| 569 | 569 | len = nb_sectors * 512; |
| 570 | - ret = drv->bdrv_pwrite(bs, sector_num * 512, buf, len); | |
| 571 | - if (ret < 0) | |
| 572 | - return ret; | |
| 573 | - else if (ret != len) | |
| 574 | - return -EIO; | |
| 575 | - else { | |
| 576 | - bs->wr_bytes += (unsigned) len; | |
| 577 | - bs->wr_ops ++; | |
| 578 | - return 0; | |
| 579 | - } | |
| 580 | - } else { | |
| 581 | - return drv->bdrv_write(bs, sector_num, buf, nb_sectors); | |
| 570 | + do { | |
| 571 | + ret = drv->bdrv_pwrite(bs, sector_num * 512, buf, len - count); | |
| 572 | + if (ret < 0) { | |
| 573 | + printf("bdrv_write ret=%d\n", ret); | |
| 574 | + return ret; | |
| 575 | + } | |
| 576 | + count += ret; | |
| 577 | + buf += ret; | |
| 578 | + } while (count != len); | |
| 579 | + bs->wr_bytes += (unsigned) len; | |
| 580 | + bs->wr_ops ++; | |
| 581 | + return 0; | |
| 582 | 582 | } |
| 583 | + return drv->bdrv_write(bs, sector_num, buf, nb_sectors); | |
| 583 | 584 | } |
| 584 | 585 | |
| 585 | 586 | static int bdrv_pread_em(BlockDriverState *bs, int64_t offset, | ... | ... |