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

This is the size of the merge buffer.

Signed-off-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 00b7e0c..0b8765c 100644 (file)
--- a/drivers/ide/ide-tape.c
+++ b/drivers/ide/ide-tape.c
@@ -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;