3.2-stable review patch. If anyone has any objections, please let me know.
------------------ From: Roland Dreier <[email protected]> commit 1a5fa4576ec8a462313c7516b31d7453481ddbe8 upstream. The UNMAP DATA LENGTH and UNMAP BLOCK DESCRIPTOR DATA LENGTH fields are in the unmap descriptor (the payload transferred to our data out buffer), not in the CDB itself. Read them from the correct place in target_emulated_unmap. Signed-off-by: Roland Dreier <[email protected]> Signed-off-by: Nicholas Bellinger <[email protected]> [bwh: Backported to 3.2: adjust filename, context] Signed-off-by: Ben Hutchings <[email protected]> --- drivers/target/target_core_cdb.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) --- a/drivers/target/target_core_cdb.c +++ b/drivers/target/target_core_cdb.c @@ -1114,7 +1114,6 @@ int target_emulate_unmap(struct se_task struct se_cmd *cmd = task->task_se_cmd; struct se_device *dev = cmd->se_dev; unsigned char *buf, *ptr = NULL; - unsigned char *cdb = &cmd->t_task_cdb[0]; sector_t lba; unsigned int size = cmd->data_length, range; int ret = 0, offset; @@ -1130,11 +1129,12 @@ int target_emulate_unmap(struct se_task /* First UNMAP block descriptor starts at 8 byte offset */ offset = 8; size -= 8; - dl = get_unaligned_be16(&cdb[0]); - bd_dl = get_unaligned_be16(&cdb[2]); buf = transport_kmap_data_sg(cmd); + dl = get_unaligned_be16(&buf[0]); + bd_dl = get_unaligned_be16(&buf[2]); + ptr = &buf[offset]; pr_debug("UNMAP: Sub: %s Using dl: %hu bd_dl: %hu size: %hu" " ptr: %p\n", dev->transport->name, dl, bd_dl, size, ptr); -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
