Re: [PATCH] 2.2.18 IDE tape problem, with ide-scsi

From: Chip Salzenberg (chip@valinux.com)
Date: Tue Mar 06 2001 - 19:34:21 EST

With Andre's IDE subsystem, I found the below patch necessary to use
my IDE tape drive (Exabyte Eagle TR-4). Frankly, it's been so long
since I created this patch that I can't remember the detailed reasons
for the changes. But I knew them once. :-) And it works for me.

Reminder, this is against Andre Hedrick's 2.2 IDE subsystem.

Index: drivers/block/ide-tape.c
--- drivers/block/ide-tape.c.prev
+++ drivers/block/ide-tape.c Tue Dec 5 01:17:32 2000
@@ -3096,7 +3096,10 @@ static int idetape_queue_pc_tail (ide_dr
 static int idetape_flush_tape_buffers (ide_drive_t *drive)
 {
+ idetape_tape_t *tape = drive->driver_data;
         idetape_pc_t pc;
         int rc;
 
+ if (tape->chrdev_direction != idetape_direction_write)
+ return 0;
         idetape_create_write_filemark_cmd(drive, &pc, 0);
         if ((rc = idetape_queue_pc_tail (drive,&pc)))
@@ -5199,12 +5202,15 @@ static int idetape_chrdev_open (struct i
         if (tape->chrdev_direction == idetape_direction_none) {
                 MOD_INC_USE_COUNT;
+ if (tape->onstream) {
 #if ONSTREAM_DEBUG
- if (tape->debug_level >= 6)
- printk(KERN_INFO "ide-tape: MOD_INC_USE_COUNT in idetape_chrdev_open-2\n");
+ if (tape->debug_level >= 6)
+ printk(KERN_INFO "ide-tape: MOD_INC_USE_COUNT"
+ " in idetape_chrdev_open-2\n");
 #endif
- 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;
+ 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;
+ }
                 }
                 idetape_analyze_headers(drive);
@@ -5258,14 +5264,17 @@ static int idetape_chrdev_release (struc
                 (void) idetape_rewind_tape (drive);
         if (tape->chrdev_direction == idetape_direction_none) {
- if (tape->door_locked != DOOR_EXPLICITLY_LOCKED) {
- idetape_create_prevent_cmd(drive, &pc, 0);
- if (!idetape_queue_pc_tail (drive,&pc))
- tape->door_locked = DOOR_UNLOCKED;
- }
- MOD_DEC_USE_COUNT;
+ if (tape->onstream) {
+ if (tape->door_locked != DOOR_EXPLICITLY_LOCKED) {
+ idetape_create_prevent_cmd(drive, &pc, 0);
+ if (!idetape_queue_pc_tail (drive,&pc))
+ tape->door_locked = DOOR_UNLOCKED;
+ }
 #if ONSTREAM_DEBUG
- if (tape->debug_level >= 6)
- printk(KERN_INFO "ide-tape: MOD_DEC_USE_COUNT in idetape_chrdev_release\n");
+ if (tape->debug_level >= 6)
+ printk(KERN_INFO "ide-tape: MOD_DEC_USE_COUNT"
+ " in idetape_chrdev_release\n");
 #endif
+ }
+ MOD_DEC_USE_COUNT;
         }
         clear_bit (IDETAPE_BUSY, &tape->flags); 

-- 
Chip Salzenberg              - a.k.a. -             <chip@valinux.com>
 "We have no fuel on board, plus or minus 8 kilograms."  -- NEAR tech
-
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This archive was generated by hypermail 2b29 : Wed Mar 07 2001 - 21:00:21 EST