Merge branch 'x86-boot-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...

[karo-tx-linux.git] / drivers / target / target_core_sbc.c

diff --git a/drivers/target/target_core_sbc.c b/drivers/target/target_core_sbc.c
index 868f8aa04f13d318b1c752d08887703f7a72de21..a6e27d967c7b7b4abc53dd194927252ed2cde897 100644 (file)
--- a/drivers/target/target_core_sbc.c
+++ b/drivers/target/target_core_sbc.c
@@ -135,6 +135,12 @@ static int sbc_emulate_verify(struct se_cmd *cmd)
        return 0;
 }
 
+static int sbc_emulate_noop(struct se_cmd *cmd)
+{
+       target_complete_cmd(cmd, GOOD);
+       return 0;
+}
+
 static inline u32 sbc_get_size(struct se_cmd *cmd, u32 sectors)
 {
        return cmd->se_dev->se_sub_dev->se_dev_attrib.block_size * sectors;
@@ -531,6 +537,18 @@ int sbc_parse_cdb(struct se_cmd *cmd, struct spc_ops *ops)
                size = 0;
                cmd->execute_cmd = sbc_emulate_verify;
                break;
+       case REZERO_UNIT:
+       case SEEK_6:
+       case SEEK_10:
+               /*
+                * There are still clients out there which use these old SCSI-2
+                * commands. This mainly happens when running VMs with legacy
+                * guest systems, connected via SCSI command pass-through to
+                * iSCSI targets. Make them happy and return status GOOD.
+                */
+               size = 0;
+               cmd->execute_cmd = sbc_emulate_noop;
+               break;
        default:
                ret = spc_parse_cdb(cmd, &size);
                if (ret)