1 files changed, 18 insertions, 3 deletions

diff --git a/drivers/scsi/st.c b/drivers/scsi/st.c
index a15f691f9d34..e41998cb098e 100644
--- a/drivers/scsi/st.c
+++ b/drivers/scsi/st.c
@@ -1105,6 +1105,12 @@ static int check_tape(struct scsi_tape *STp, struct file *filp)
                                     STp->drv_buffer));
                 }
                 STp->drv_write_prot = ((STp->buffer)->b_data[2] & 0x80) != 0;
+                if (!STp->drv_buffer && STp->immediate_filemark) {
+                        printk(KERN_WARNING
+                            "%s: non-buffered tape: disabling writing immediate filemarks\n",
+                            name);
+                        STp->immediate_filemark = 0;
+                }
         }
         st_release_request(SRpnt);
         SRpnt = NULL;
@@ -1313,6 +1319,8 @@ static int st_flush(struct file *filp, fl_owner_t id)
 
                 memset(cmd, 0, MAX_COMMAND_SIZE);
                 cmd[0] = WRITE_FILEMARKS;
+                if (STp->immediate_filemark)
+                        cmd[1] = 1;
                 cmd[4] = 1 + STp->two_fm;
 
                 SRpnt = st_do_scsi(NULL, STp, cmd, 0, DMA_NONE,
@@ -2180,8 +2188,9 @@ static void st_log_options(struct scsi_tape * STp, struct st_modedef * STm, char
                        name, STm->defaults_for_writes, STp->omit_blklims, STp->can_partitions,
                        STp->scsi2_logical);
                 printk(KERN_INFO
-                       "%s:    sysv: %d nowait: %d sili: %d\n", name, STm->sysv, STp->immediate,
-                        STp->sili);
+                       "%s:    sysv: %d nowait: %d sili: %d nowait_filemark: %d\n",
+                       name, STm->sysv, STp->immediate, STp->sili,
+                       STp->immediate_filemark);
                 printk(KERN_INFO "%s:    debugging: %d\n",
                        name, debugging);
         }
@@ -2223,6 +2232,7 @@ static int st_set_options(struct scsi_tape *STp, long options)
                         STp->can_partitions = (options & MT_ST_CAN_PARTITIONS) != 0;
                 STp->scsi2_logical = (options & MT_ST_SCSI2LOGICAL) != 0;
                 STp->immediate = (options & MT_ST_NOWAIT) != 0;
+                STp->immediate_filemark = (options & MT_ST_NOWAIT_EOF) != 0;
                 STm->sysv = (options & MT_ST_SYSV) != 0;
                 STp->sili = (options & MT_ST_SILI) != 0;
                 DEB( debugging = (options & MT_ST_DEBUGGING) != 0;
@@ -2254,6 +2264,8 @@ static int st_set_options(struct scsi_tape *STp, long options)
                         STp->scsi2_logical = value;
                 if ((options & MT_ST_NOWAIT) != 0)
                         STp->immediate = value;
+                if ((options & MT_ST_NOWAIT_EOF) != 0)
+                        STp->immediate_filemark = value;
                 if ((options & MT_ST_SYSV) != 0)
                         STm->sysv = value;
                 if ((options & MT_ST_SILI) != 0)
@@ -2713,7 +2725,8 @@ static int st_int_ioctl(struct scsi_tape *STp, unsigned int cmd_in, unsigned lon
                 cmd[0] = WRITE_FILEMARKS;
                 if (cmd_in == MTWSM)
                         cmd[1] = 2;
-                if (cmd_in == MTWEOFI)
+                if (cmd_in == MTWEOFI ||
+                    (cmd_in == MTWEOF && STp->immediate_filemark))
                         cmd[1] |= 1;
                 cmd[2] = (arg >> 16);
                 cmd[3] = (arg >> 8);
@@ -4092,6 +4105,7 @@ static int st_probe(struct device *dev)
         tpnt->scsi2_logical = ST_SCSI2LOGICAL;
         tpnt->sili = ST_SILI;
         tpnt->immediate = ST_NOWAIT;
+        tpnt->immediate_filemark = 0;
         tpnt->default_drvbuffer = 0xff;         /* No forced buffering */
         tpnt->partition = 0;
         tpnt->new_partition = 0;
@@ -4477,6 +4491,7 @@ st_options_show(struct device *dev, struct device_attribute *attr, char *buf)
         options |= STp->scsi2_logical ? MT_ST_SCSI2LOGICAL : 0;
         options |= STm->sysv ? MT_ST_SYSV : 0;
         options |= STp->immediate ? MT_ST_NOWAIT : 0;
+        options |= STp->immediate_filemark ? MT_ST_NOWAIT_EOF : 0;
         options |= STp->sili ? MT_ST_SILI : 0;
 
         l = snprintf(buf, PAGE_SIZE, "0x%08x\n", options);