Merge tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi

Pull SCSI fixes from James Bottomley:
 "Three small bug fixes (barrier elimination, memory leak on unload,
  spinlock recursion) and a technical enhancement left over from the
  merge window: the TCMU read length support is required for tape
  devices read when the length of the read is greater than the tape
  block size"

* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
  scsi: scsi_debug: Fix memory leak on module unload
  scsi: qla2xxx: Spinlock recursion in qla_target
  scsi: ipr: Eliminate duplicate barriers
  scsi: target: tcmu: add read length support

1 files changed, 3 insertions, 1 deletions

diff --git a/include/uapi/linux/target_core_user.h b/include/uapi/linux/target_core_user.h
index 6e299349b158..b7b57967d90f 100644
--- a/include/uapi/linux/target_core_user.h
+++ b/include/uapi/linux/target_core_user.h
@@ -44,6 +44,7 @@
 #define TCMU_MAILBOX_VERSION 2
 #define ALIGN_SIZE 64 /* Should be enough for most CPUs */
 #define TCMU_MAILBOX_FLAG_CAP_OOOC (1 << 0) /* Out-of-order completions */
+#define TCMU_MAILBOX_FLAG_CAP_READ_LEN (1 << 1) /* Read data length */
 
 struct tcmu_mailbox {
         __u16 version;
@@ -71,6 +72,7 @@ struct tcmu_cmd_entry_hdr {
         __u16 cmd_id;
         __u8 kflags;
 #define TCMU_UFLAG_UNKNOWN_OP 0x1
+#define TCMU_UFLAG_READ_LEN   0x2
         __u8 uflags;
 
 } __packed;
@@ -119,7 +121,7 @@ struct tcmu_cmd_entry {
                         __u8 scsi_status;
                         __u8 __pad1;
                         __u16 __pad2;
-                        __u32 __pad3;
+                        __u32 read_len;
                         char sense_buffer[TCMU_SENSE_BUFFERSIZE];
                 } rsp;
         };