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ide-tape: mv tape->merge_stage_size tape->merge_bh_size

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This is the size of the merge buffer.

Signed-off-by: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
This commit is contained in:
Borislav Petkov 2008-04-27 15:38:34 +02:00 committed by Bartlomiej Zolnierkiewicz
parent d9df937af4
commit 01a63aebe4
1 changed files with 31 additions and 30 deletions
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61
drivers/ide/ide-tape.c
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@ -310,7 +310,8 @@ typedef struct ide_tape_obj {
/* Data buffer size chosen based on the tape's recommendation */
int buffer_size;
idetape_stage_t *merge_stage;
int merge_stage_size;
/* size of the merge buffer */
int merge_bh_size;
struct idetape_bh *bh;
char *b_data;
int b_count;
@ -1649,7 +1650,7 @@ static void __ide_tape_discard_merge_buffer(ide_drive_t *drive)
return;
clear_bit(IDETAPE_FLAG_FILEMARK, &tape->flags);
tape->merge_stage_size = 0;
tape->merge_bh_size = 0;
if (tape->merge_stage != NULL) {
ide_tape_kfree_buffer(tape->merge_stage);
tape->merge_stage = NULL;
@ -1790,17 +1791,17 @@ static void ide_tape_flush_merge_buffer(ide_drive_t *drive)
" but we are not writing.\n");
return;
}
if (tape->merge_stage_size > tape->buffer_size) {
if (tape->merge_bh_size > tape->buffer_size) {
printk(KERN_ERR "ide-tape: bug: merge_buffer too big\n");
tape->merge_stage_size = tape->buffer_size;
tape->merge_bh_size = tape->buffer_size;
}
if (tape->merge_stage_size) {
blocks = tape->merge_stage_size / tape->blk_size;
if (tape->merge_stage_size % tape->blk_size) {
if (tape->merge_bh_size) {
blocks = tape->merge_bh_size / tape->blk_size;
if (tape->merge_bh_size % tape->blk_size) {
unsigned int i;
blocks++;
i = tape->blk_size - tape->merge_stage_size %
i = tape->blk_size - tape->merge_bh_size %
tape->blk_size;
bh = tape->bh->b_reqnext;
while (bh) {
@ -1824,7 +1825,7 @@ static void ide_tape_flush_merge_buffer(ide_drive_t *drive)
}
}
(void) idetape_add_chrdev_write_request(drive, blocks);
tape->merge_stage_size = 0;
tape->merge_bh_size = 0;
}
if (tape->merge_stage != NULL) {
ide_tape_kfree_buffer(tape->merge_stage);
@ -1844,10 +1845,10 @@ static int idetape_init_read(ide_drive_t *drive)
ide_tape_flush_merge_buffer(drive);
idetape_flush_tape_buffers(drive);
}
if (tape->merge_stage || tape->merge_stage_size) {
printk(KERN_ERR "ide-tape: merge_stage_size should be"
if (tape->merge_stage || tape->merge_bh_size) {
printk(KERN_ERR "ide-tape: merge_bh_size should be"
" 0 now\n");
tape->merge_stage_size = 0;
tape->merge_bh_size = 0;
}
tape->merge_stage = ide_tape_kmalloc_buffer(tape, 0, 0);
if (!tape->merge_stage)
@ -1993,7 +1994,7 @@ static int idetape_space_over_filemarks(ide_drive_t *drive, short mt_op,
}
if (tape->chrdev_dir == IDETAPE_DIR_READ) {
tape->merge_stage_size = 0;
tape->merge_bh_size = 0;
if (test_and_clear_bit(IDETAPE_FLAG_FILEMARK, &tape->flags))
++count;
ide_tape_discard_merge_buffer(drive, 0);
@ -2063,13 +2064,13 @@ static ssize_t idetape_chrdev_read(struct file *file, char __user *buf,
return rc;
if (count == 0)
return (0);
if (tape->merge_stage_size) {
actually_read = min((unsigned int)(tape->merge_stage_size),
if (tape->merge_bh_size) {
actually_read = min((unsigned int)(tape->merge_bh_size),
(unsigned int)count);
if (idetape_copy_stage_to_user(tape, buf, actually_read))
ret = -EFAULT;
buf += actually_read;
tape->merge_stage_size -= actually_read;
tape->merge_bh_size -= actually_read;
count -= actually_read;
}
while (count >= tape->buffer_size) {
@ -2090,7 +2091,7 @@ static ssize_t idetape_chrdev_read(struct file *file, char __user *buf,
if (idetape_copy_stage_to_user(tape, buf, temp))
ret = -EFAULT;
actually_read += temp;
tape->merge_stage_size = bytes_read-temp;
tape->merge_bh_size = bytes_read-temp;
}
finish:
if (!actually_read && test_bit(IDETAPE_FLAG_FILEMARK, &tape->flags)) {
@ -2122,10 +2123,10 @@ static ssize_t idetape_chrdev_write(struct file *file, const char __user *buf,
if (tape->chrdev_dir != IDETAPE_DIR_WRITE) {
if (tape->chrdev_dir == IDETAPE_DIR_READ)
ide_tape_discard_merge_buffer(drive, 1);
if (tape->merge_stage || tape->merge_stage_size) {
printk(KERN_ERR "ide-tape: merge_stage_size "
if (tape->merge_stage || tape->merge_bh_size) {
printk(KERN_ERR "ide-tape: merge_bh_size "
"should be 0 now\n");
tape->merge_stage_size = 0;
tape->merge_bh_size = 0;
}
tape->merge_stage = ide_tape_kmalloc_buffer(tape, 0, 0);
if (!tape->merge_stage)
@ -2153,23 +2154,23 @@ static ssize_t idetape_chrdev_write(struct file *file, const char __user *buf,
}
if (count == 0)
return (0);
if (tape->merge_stage_size) {
if (tape->merge_stage_size >= tape->buffer_size) {
if (tape->merge_bh_size) {
if (tape->merge_bh_size >= tape->buffer_size) {
printk(KERN_ERR "ide-tape: bug: merge buf too big\n");
tape->merge_stage_size = 0;
tape->merge_bh_size = 0;
}
actually_written = min((unsigned int)
(tape->buffer_size - tape->merge_stage_size),
(tape->buffer_size - tape->merge_bh_size),
(unsigned int)count);
if (idetape_copy_stage_from_user(tape, buf, actually_written))
ret = -EFAULT;
buf += actually_written;
tape->merge_stage_size += actually_written;
tape->merge_bh_size += actually_written;
count -= actually_written;
if (tape->merge_stage_size == tape->buffer_size) {
if (tape->merge_bh_size == tape->buffer_size) {
ssize_t retval;
tape->merge_stage_size = 0;
tape->merge_bh_size = 0;
retval = idetape_add_chrdev_write_request(drive, ctl);
if (retval <= 0)
return (retval);
@ -2190,7 +2191,7 @@ static ssize_t idetape_chrdev_write(struct file *file, const char __user *buf,
actually_written += count;
if (idetape_copy_stage_from_user(tape, buf, count))
ret = -EFAULT;
tape->merge_stage_size += count;
tape->merge_bh_size += count;
}
return ret ? ret : actually_written;
}
@ -2361,7 +2362,7 @@ static int idetape_chrdev_ioctl(struct inode *inode, struct file *file,
idetape_flush_tape_buffers(drive);
}
if (cmd == MTIOCGET || cmd == MTIOCPOS) {
block_offset = tape->merge_stage_size /
block_offset = tape->merge_bh_size /
(tape->blk_size * tape->user_bs_factor);
position = idetape_read_position(drive);
if (position < 0)
@ -2790,7 +2791,7 @@ static void ide_tape_release(struct kref *kref)
ide_drive_t *drive = tape->drive;
struct gendisk *g = tape->disk;
BUG_ON(tape->merge_stage_size);
BUG_ON(tape->merge_bh_size);
drive->dsc_overlap = 0;
drive->driver_data = NULL;