diff options
| author | Roland Dreier <roland@purestorage.com> | 2012-07-16 17:10:17 -0700 |
|---|---|---|
| committer | Nicholas Bellinger <nab@linux-iscsi.org> | 2012-07-16 17:10:17 -0700 |
| commit | 1765fe5edcb83f53fc67edeb559fcf4bc82c6460 (patch) | |
| tree | 8248c8a4f2a92b7806aca6457ddf5337464880b5 /drivers | |
| parent | d35212f3ca3bf4fb49d15e37f530c9931e2d2183 (diff) | |
target: Fix range calculation in WRITE SAME emulation when num blocks == 0
When NUMBER OF LOGICAL BLOCKS is 0, WRITE SAME is supposed to write
all the blocks from the specified LBA through the end of the device.
However, dev->transport->get_blocks(dev) (perhaps confusingly) returns
the last valid LBA rather than the number of blocks, so the correct
number of blocks to write starting with lba is
dev->transport->get_blocks(dev) - lba + 1
(nab: Backport roland's for-3.6 patch to for-3.5)
Signed-off-by: Roland Dreier <roland@purestorage.com>
Cc: Cc: <stable@vger.kernel.org>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/target/target_core_cdb.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/target/target_core_cdb.c b/drivers/target/target_core_cdb.c index 9888693a18f..664f6e775d0 100644 --- a/drivers/target/target_core_cdb.c +++ b/drivers/target/target_core_cdb.c @@ -1095,7 +1095,7 @@ int target_emulate_write_same(struct se_cmd *cmd) if (num_blocks != 0) range = num_blocks; else - range = (dev->transport->get_blocks(dev) - lba); + range = (dev->transport->get_blocks(dev) - lba) + 1; pr_debug("WRITE_SAME UNMAP: LBA: %llu Range: %llu\n", (unsigned long long)lba, (unsigned long long)range); |