From: Matthias Kaehlcke <[EMAIL PROTECTED]>
The OnStream SCSI Tape driver uses a semaphore as mutex. Use the mutex API
instead of the (binary) semaphore.
Signed-off-by: Matthias Kaehlcke <[EMAIL PROTECTED]>
Reviewed-by: Satyam Sharma <[EMAIL PROTECTED]>
Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
---
drivers/scsi/osst.c | 16 ++++++++--------
drivers/scsi/osst.h | 3 ++-
2 files changed, 10 insertions(+), 9 deletions(-)
diff -puN
drivers/scsi/osst.c~use-mutex-instead-of-semaphore-in-the-onstream-scsi-tape-driver
drivers/scsi/osst.c
---
a/drivers/scsi/osst.c~use-mutex-instead-of-semaphore-in-the-onstream-scsi-tape-driver
+++ a/drivers/scsi/osst.c
@@ -3298,7 +3298,7 @@ static ssize_t osst_write(struct file *
char * name = tape_name(STp);
- if (down_interruptible(&STp->lock))
+ if (mutex_lock_interruptible(&STp->lock))
return (-ERESTARTSYS);
/*
@@ -3600,7 +3600,7 @@ if (SRpnt) printk(KERN_ERR "%s:A: Not su
out:
if (SRpnt != NULL) osst_release_request(SRpnt);
- up(&STp->lock);
+ mutex_unlock(&STp->lock);
return retval;
}
@@ -3619,7 +3619,7 @@ static ssize_t osst_read(struct file * f
char * name = tape_name(STp);
- if (down_interruptible(&STp->lock))
+ if (mutex_lock_interruptible(&STp->lock))
return (-ERESTARTSYS);
/*
@@ -3785,7 +3785,7 @@ static ssize_t osst_read(struct file * f
out:
if (SRpnt != NULL) osst_release_request(SRpnt);
- up(&STp->lock);
+ mutex_unlock(&STp->lock);
return retval;
}
@@ -4852,7 +4852,7 @@ static int osst_ioctl(struct inode * ino
char * name = tape_name(STp);
void __user * p = (void __user *)arg;
- if (down_interruptible(&STp->lock))
+ if (mutex_lock_interruptible(&STp->lock))
return -ERESTARTSYS;
#if DEBUG
@@ -5163,14 +5163,14 @@ static int osst_ioctl(struct inode * ino
}
if (SRpnt) osst_release_request(SRpnt);
- up(&STp->lock);
+ mutex_unlock(&STp->lock);
return scsi_ioctl(STp->device, cmd_in, p);
out:
if (SRpnt) osst_release_request(SRpnt);
- up(&STp->lock);
+ mutex_unlock(&STp->lock);
return retval;
}
@@ -5866,7 +5866,7 @@ static int osst_probe(struct device *dev
tpnt->modes[2].defined = 1;
tpnt->density_changed = tpnt->compression_changed =
tpnt->blksize_changed = 0;
- init_MUTEX(&tpnt->lock);
+ mutex_init(&tpnt->lock);
osst_nr_dev++;
write_unlock(&os_scsi_tapes_lock);
diff -puN
drivers/scsi/osst.h~use-mutex-instead-of-semaphore-in-the-onstream-scsi-tape-driver
drivers/scsi/osst.h
---
a/drivers/scsi/osst.h~use-mutex-instead-of-semaphore-in-the-onstream-scsi-tape-driver
+++ a/drivers/scsi/osst.h
@@ -4,6 +4,7 @@
#include <asm/byteorder.h>
#include <linux/completion.h>
+#include <linux/mutex.h>
/* FIXME - rename and use the following two types or delete them!
* and the types really should go to st.h anyway...
@@ -532,7 +533,7 @@ struct osst_tape {
struct scsi_driver *driver;
unsigned capacity;
struct scsi_device *device;
- struct semaphore lock; /* for serialization */
+ struct mutex lock; /* for serialization */
struct completion wait; /* for SCSI commands */
struct osst_buffer * buffer;
_
-
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