leandrof/linux
1
0
Fork 0
forked from Minki/linux
Code Issues Pull Requests Packages Projects Releases Wiki Activity

ide-tape: fix IDE_AFLAG_* atomic accesses

Browse Source 
These flags used to be bit numbers and now are single bits in the
->atapi_flags vector. Use them properly.

Spotted-by: Jiri Slaby <jirislaby@gmail.com>
Signed-off-by: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
This commit is contained in:
Borislav Petkov 2009-06-07 15:37:06 +02:00 committed by Bartlomiej Zolnierkiewicz
parent 626542ca22
commit 49d8078ad1
1 changed files with 26 additions and 17 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

43
drivers/ide/ide-tape.c
View File

@ -397,7 +397,8 @@ static int ide_tape_callback(ide_drive_t *drive, int dsc)
if (readpos[0] & 0x4) {
printk(KERN_INFO "ide-tape: Block location is unknown"
"to the tape\n");
clear_bit(IDE_AFLAG_ADDRESS_VALID, &drive->atapi_flags);
clear_bit(ilog2(IDE_AFLAG_ADDRESS_VALID),
&drive->atapi_flags);
uptodate = 0;
err = IDE_DRV_ERROR_GENERAL;
} else {
@ -406,7 +407,8 @@ static int ide_tape_callback(ide_drive_t *drive, int dsc)
tape->partition = readpos[1];
tape->first_frame = be32_to_cpup((__be32 *)&readpos[4]);
set_bit(IDE_AFLAG_ADDRESS_VALID, &drive->atapi_flags);
set_bit(ilog2(IDE_AFLAG_ADDRESS_VALID),
&drive->atapi_flags);
}
}
@ -746,7 +748,7 @@ static int idetape_wait_ready(ide_drive_t *drive, unsigned long timeout)
int load_attempted = 0;
/* Wait for the tape to become ready */
set_bit(IDE_AFLAG_MEDIUM_PRESENT, &drive->atapi_flags);
set_bit(ilog2(IDE_AFLAG_MEDIUM_PRESENT), &drive->atapi_flags);
timeout += jiffies;
while (time_before(jiffies, timeout)) {
if (ide_do_test_unit_ready(drive, disk) == 0)
@ -822,7 +824,7 @@ static void __ide_tape_discard_merge_buffer(ide_drive_t *drive)
if (tape->chrdev_dir != IDETAPE_DIR_READ)
return;
clear_bit(IDE_AFLAG_FILEMARK, &drive->atapi_flags);
clear_bit(ilog2(IDE_AFLAG_FILEMARK), &drive->atapi_flags);
tape->valid = 0;
if (tape->buf != NULL) {
kfree(tape->buf);
@ -1115,7 +1117,8 @@ static int idetape_space_over_filemarks(ide_drive_t *drive, short mt_op,
if (tape->chrdev_dir == IDETAPE_DIR_READ) {
tape->valid = 0;
if (test_and_clear_bit(IDE_AFLAG_FILEMARK, &drive->atapi_flags))
if (test_and_clear_bit(ilog2(IDE_AFLAG_FILEMARK),
&drive->atapi_flags))
++count;
ide_tape_discard_merge_buffer(drive, 0);
}
@ -1170,7 +1173,7 @@ static ssize_t idetape_chrdev_read(struct file *file, char __user *buf,
debug_log(DBG_CHRDEV, "Enter %s, count %Zd\n", __func__, count);
if (tape->chrdev_dir != IDETAPE_DIR_READ) {
if (test_bit(IDE_AFLAG_DETECT_BS, &drive->atapi_flags))
if (test_bit(ilog2(IDE_AFLAG_DETECT_BS), &drive->atapi_flags))
if (count > tape->blk_size &&
(count % tape->blk_size) == 0)
tape->user_bs_factor = count / tape->blk_size;
@ -1186,7 +1189,8 @@ static ssize_t idetape_chrdev_read(struct file *file, char __user *buf,
/* refill if staging buffer is empty */
if (!tape->valid) {
/* If we are at a filemark, nothing more to read */
if (test_bit(IDE_AFLAG_FILEMARK, &drive->atapi_flags))
if (test_bit(ilog2(IDE_AFLAG_FILEMARK),
&drive->atapi_flags))
break;
/* read */
if (idetape_queue_rw_tail(drive, REQ_IDETAPE_READ,
@ -1204,7 +1208,7 @@ static ssize_t idetape_chrdev_read(struct file *file, char __user *buf,
done += todo;
}
if (!done && test_bit(IDE_AFLAG_FILEMARK, &drive->atapi_flags)) {
if (!done && test_bit(ilog2(IDE_AFLAG_FILEMARK), &drive->atapi_flags)) {
debug_log(DBG_SENSE, "%s: spacing over filemark\n", tape->name);
idetape_space_over_filemarks(drive, MTFSF, 1);
@ -1338,7 +1342,8 @@ static int idetape_mtioctop(ide_drive_t *drive, short mt_op, int mt_count)
ide_tape_discard_merge_buffer(drive, 0);
retval = ide_do_start_stop(drive, disk, !IDETAPE_LU_LOAD_MASK);
if (!retval)
clear_bit(IDE_AFLAG_MEDIUM_PRESENT, &drive->atapi_flags);
clear_bit(ilog2(IDE_AFLAG_MEDIUM_PRESENT),
&drive->atapi_flags);
return retval;
case MTNOP:
ide_tape_discard_merge_buffer(drive, 0);
@ -1360,9 +1365,11 @@ static int idetape_mtioctop(ide_drive_t *drive, short mt_op, int mt_count)
mt_count % tape->blk_size)
return -EIO;
tape->user_bs_factor = mt_count / tape->blk_size;
clear_bit(IDE_AFLAG_DETECT_BS, &drive->atapi_flags);
clear_bit(ilog2(IDE_AFLAG_DETECT_BS),
&drive->atapi_flags);
} else
set_bit(IDE_AFLAG_DETECT_BS, &drive->atapi_flags);
set_bit(ilog2(IDE_AFLAG_DETECT_BS),
&drive->atapi_flags);
return 0;
case MTSEEK:
ide_tape_discard_merge_buffer(drive, 0);
@ -1507,20 +1514,20 @@ static int idetape_chrdev_open(struct inode *inode, struct file *filp)
filp->private_data = tape;
if (test_and_set_bit(IDE_AFLAG_BUSY, &drive->atapi_flags)) {
if (test_and_set_bit(ilog2(IDE_AFLAG_BUSY), &drive->atapi_flags)) {
retval = -EBUSY;
goto out_put_tape;
}
retval = idetape_wait_ready(drive, 60 * HZ);
if (retval) {
clear_bit(IDE_AFLAG_BUSY, &drive->atapi_flags);
clear_bit(ilog2(IDE_AFLAG_BUSY), &drive->atapi_flags);
printk(KERN_ERR "ide-tape: %s: drive not ready\n", tape->name);
goto out_put_tape;
}
idetape_read_position(drive);
if (!test_bit(IDE_AFLAG_ADDRESS_VALID, &drive->atapi_flags))
if (!test_bit(ilog2(IDE_AFLAG_ADDRESS_VALID), &drive->atapi_flags))
(void)idetape_rewind_tape(drive);
/* Read block size and write protect status from drive. */
@ -1536,7 +1543,7 @@ static int idetape_chrdev_open(struct inode *inode, struct file *filp)
if (tape->write_prot) {
if ((filp->f_flags & O_ACCMODE) == O_WRONLY ||
(filp->f_flags & O_ACCMODE) == O_RDWR) {
clear_bit(IDE_AFLAG_BUSY, &drive->atapi_flags);
clear_bit(ilog2(IDE_AFLAG_BUSY), &drive->atapi_flags);
retval = -EROFS;
goto out_put_tape;
}
@ -1593,15 +1600,17 @@ static int idetape_chrdev_release(struct inode *inode, struct file *filp)
ide_tape_discard_merge_buffer(drive, 1);
}
if (minor < 128 && test_bit(IDE_AFLAG_MEDIUM_PRESENT, &drive->atapi_flags))
if (minor < 128 && test_bit(ilog2(IDE_AFLAG_MEDIUM_PRESENT),
&drive->atapi_flags))
(void) idetape_rewind_tape(drive);
if (tape->chrdev_dir == IDETAPE_DIR_NONE) {
if (tape->door_locked == DOOR_LOCKED) {
if (!ide_set_media_lock(drive, tape->disk, 0))
tape->door_locked = DOOR_UNLOCKED;
}
}
clear_bit(IDE_AFLAG_BUSY, &drive->atapi_flags);
clear_bit(ilog2(IDE_AFLAG_BUSY), &drive->atapi_flags);
ide_tape_put(tape);
unlock_kernel();
return 0;