1 files changed, 15 insertions, 12 deletions

diff --git a/drivers/scsi/st.c b/drivers/scsi/st.c
index 24211d0efa6d..5b7388f1c835 100644
--- a/drivers/scsi/st.c
+++ b/drivers/scsi/st.c
@@ -9,7 +9,7 @@
    Steve Hirsch, Andreas Koppenh"ofer, Michael Leodolter, Eyal Lebedinsky,
    Michael Schaefer, J"org Weule, and Eric Youngdale.
 
-   Copyright 1992 - 2008 Kai Makisara
+   Copyright 1992 - 2010 Kai Makisara
    email Kai.Makisara@kolumbus.fi
 
    Some small formal changes - aeb, 950809
@@ -17,7 +17,7 @@
    Last modified: 18-JAN-1998 Richard Gooch <rgooch@atnf.csiro.au> Devfs support
  */
 
-static const char *verstr = "20081215";
+static const char *verstr = "20100829";
 
 #include <linux/module.h>
 
@@ -39,7 +39,6 @@ static const char *verstr = "20081215";
 #include <linux/cdev.h>
 #include <linux/delay.h>
 #include <linux/mutex.h>
-#include <linux/smp_lock.h>
 
 #include <asm/uaccess.h>
 #include <asm/dma.h>
@@ -76,6 +75,7 @@ static const char *verstr = "20081215";
 #include "st_options.h"
 #include "st.h"
 
+static DEFINE_MUTEX(st_mutex);
 static int buffer_kbs;
 static int max_sg_segs;
 static int try_direct_io = TRY_DIRECT_IO;
@@ -1180,7 +1180,7 @@ static int st_open(struct inode *inode, struct file *filp)
         int dev = TAPE_NR(inode);
         char *name;
 
-        lock_kernel();
+        mutex_lock(&st_mutex);
         /*
          * We really want to do nonseekable_open(inode, filp); here, but some
          * versions of tar incorrectly call lseek on tapes and bail out if that
@@ -1189,7 +1189,7 @@ static int st_open(struct inode *inode, struct file *filp)
         filp->f_mode &= ~(FMODE_PREAD | FMODE_PWRITE);
 
         if (!(STp = scsi_tape_get(dev))) {
-                unlock_kernel();
+                mutex_unlock(&st_mutex);
                 return -ENXIO;
         }
 
@@ -1200,7 +1200,7 @@ static int st_open(struct inode *inode, struct file *filp)
         if (STp->in_use) {
                 write_unlock(&st_dev_arr_lock);
                 scsi_tape_put(STp);
-                unlock_kernel();
+                mutex_unlock(&st_mutex);
                 DEB( printk(ST_DEB_MSG "%s: Device already in use.\n", name); )
                 return (-EBUSY);
         }
@@ -1249,14 +1249,14 @@ static int st_open(struct inode *inode, struct file *filp)
                         retval = (-EIO);
                 goto err_out;
         }
-        unlock_kernel();
+        mutex_unlock(&st_mutex);
         return 0;
 
  err_out:
         normalize_buffer(STp->buffer);
         STp->in_use = 0;
         scsi_tape_put(STp);
-        unlock_kernel();
+        mutex_unlock(&st_mutex);
         return retval;
 
 }
@@ -2696,18 +2696,21 @@ static int st_int_ioctl(struct scsi_tape *STp, unsigned int cmd_in, unsigned lon
                 }
                 break;
         case MTWEOF:
+        case MTWEOFI:
         case MTWSM:
                 if (STp->write_prot)
                         return (-EACCES);
                 cmd[0] = WRITE_FILEMARKS;
                 if (cmd_in == MTWSM)
                         cmd[1] = 2;
+                if (cmd_in == MTWEOFI)
+                        cmd[1] |= 1;
                 cmd[2] = (arg >> 16);
                 cmd[3] = (arg >> 8);
                 cmd[4] = arg;
                 timeout = STp->device->request_queue->rq_timeout;
                 DEBC(
-                     if (cmd_in == MTWEOF)
+                     if (cmd_in != MTWSM)
                                printk(ST_DEB_MSG "%s: Writing %d filemarks.\n", name,
                                  cmd[2] * 65536 + cmd[3] * 256 + cmd[4]);
                      else
@@ -2883,8 +2886,8 @@ static int st_int_ioctl(struct scsi_tape *STp, unsigned int cmd_in, unsigned lon
                 else if (chg_eof)
                         STps->eof = ST_NOEOF;
 
-                if (cmd_in == MTWEOF)
-                        STps->rw = ST_IDLE;
+                if (cmd_in == MTWEOF || cmd_in == MTWEOFI)
+                        STps->rw = ST_IDLE;  /* prevent automatic WEOF at close */
         } else { /* SCSI command was not completely successful. Don't return
                     from this block without releasing the SCSI command block! */
                 struct st_cmdstatus *cmdstatp = &STp->buffer->cmdstat;
@@ -2901,7 +2904,7 @@ static int st_int_ioctl(struct scsi_tape *STp, unsigned int cmd_in, unsigned lon
                 else
                         undone = 0;
 
-                if (cmd_in == MTWEOF &&
+                if ((cmd_in == MTWEOF || cmd_in == MTWEOFI) &&
                     cmdstatp->have_sense &&
                     (cmdstatp->flags & SENSE_EOM)) {
                         if (cmdstatp->sense_hdr.sense_key == NO_SENSE ||