ide-tape: add ide_tape_set_media_lock() helper
Add ide_tape_set_media_lock() helper and convert idetape_mtioctop(),
idetape_chrdev_open() and idetape_chrdev_release() to use it.
There should be no functional changes caused by this patch (it is
OK to modify ->door_locked if idetape_create_prevent_cmd() fails).
Acked-by: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
diff --git a/drivers/ide/ide-tape.c b/drivers/ide/ide-tape.c
index d4a9c47..26d5b05 100644
--- a/drivers/ide/ide-tape.c
+++ b/drivers/ide/ide-tape.c
@@ -1299,6 +1299,16 @@
return 1;
}
+static int ide_tape_set_media_lock(ide_drive_t *drive, int on)
+{
+ struct ide_atapi_pc pc;
+
+ if (!idetape_create_prevent_cmd(drive, &pc, on))
+ return 0;
+
+ return idetape_queue_pc_tail(drive, &pc);
+}
+
static void __ide_tape_discard_merge_buffer(ide_drive_t *drive)
{
idetape_tape_t *tape = drive->driver_data;
@@ -1927,9 +1937,8 @@
* attempting to eject.
*/
if (tape->door_locked) {
- if (idetape_create_prevent_cmd(drive, &pc, 0))
- if (!idetape_queue_pc_tail(drive, &pc))
- tape->door_locked = DOOR_UNLOCKED;
+ if (!ide_tape_set_media_lock(drive, 0))
+ tape->door_locked = DOOR_UNLOCKED;
}
ide_tape_discard_merge_buffer(drive, 0);
idetape_create_load_unload_cmd(drive, &pc,
@@ -1973,17 +1982,13 @@
case MTFSR:
case MTBSR:
case MTLOCK:
- if (!idetape_create_prevent_cmd(drive, &pc, 1))
- return 0;
- retval = idetape_queue_pc_tail(drive, &pc);
+ retval = ide_tape_set_media_lock(drive, 1);
if (retval)
return retval;
tape->door_locked = DOOR_EXPLICITLY_LOCKED;
return 0;
case MTUNLOCK:
- if (!idetape_create_prevent_cmd(drive, &pc, 0))
- return 0;
- retval = idetape_queue_pc_tail(drive, &pc);
+ retval = ide_tape_set_media_lock(drive, 0);
if (retval)
return retval;
tape->door_locked = DOOR_UNLOCKED;
@@ -2085,7 +2090,6 @@
unsigned int minor = iminor(inode), i = minor & ~0xc0;
ide_drive_t *drive;
idetape_tape_t *tape;
- struct ide_atapi_pc pc;
int retval;
if (i >= MAX_HWIFS * MAX_DRIVES)
@@ -2148,11 +2152,9 @@
/* Lock the tape drive door so user can't eject. */
if (tape->chrdev_dir == IDETAPE_DIR_NONE) {
- if (idetape_create_prevent_cmd(drive, &pc, 1)) {
- if (!idetape_queue_pc_tail(drive, &pc)) {
- if (tape->door_locked != DOOR_EXPLICITLY_LOCKED)
- tape->door_locked = DOOR_LOCKED;
- }
+ if (!ide_tape_set_media_lock(drive, 1)) {
+ if (tape->door_locked != DOOR_EXPLICITLY_LOCKED)
+ tape->door_locked = DOOR_LOCKED;
}
}
unlock_kernel();
@@ -2185,7 +2187,6 @@
{
struct ide_tape_obj *tape = ide_tape_f(filp);
ide_drive_t *drive = tape->drive;
- struct ide_atapi_pc pc;
unsigned int minor = iminor(inode);
lock_kernel();
@@ -2204,10 +2205,8 @@
(void) idetape_rewind_tape(drive);
if (tape->chrdev_dir == IDETAPE_DIR_NONE) {
if (tape->door_locked == DOOR_LOCKED) {
- if (idetape_create_prevent_cmd(drive, &pc, 0)) {
- if (!idetape_queue_pc_tail(drive, &pc))
- tape->door_locked = DOOR_UNLOCKED;
- }
+ if (!ide_tape_set_media_lock(drive, 0))
+ tape->door_locked = DOOR_UNLOCKED;
}
}
clear_bit(IDE_AFLAG_BUSY, &drive->atapi_flags);