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author | Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> | 2008-10-10 20:39:36 (GMT) |
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committer | Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> | 2008-10-10 20:39:36 (GMT) |
commit | acaa0f5f675ccf6b8a3a11a933419068b1ea1f46 (patch) | |
tree | 8afee71c69bf765a5edd0de82c98c6470905ec20 /drivers/ide/ide-floppy.c | |
parent | c860f955681ebd83df4a03089f1910fc4b54651f (diff) | |
download | linux-acaa0f5f675ccf6b8a3a11a933419068b1ea1f46.tar.xz |
ide: add ide_io_buffers() helper
* Make ->io_buffers method return number of bytes transferred.
* Use ide_end_request() instead of idefloppy_end_request()
in ide_floppy_io_buffers() and then move the call out to
ide_pc_intr().
* Add ide_io_buffers() helper and convert ide-{floppy,scsi}.c
to use it instead of ide*_io_buffers().
There should be no functional changes caused by this patch.
Acked-by: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Diffstat (limited to 'drivers/ide/ide-floppy.c')
-rw-r--r-- | drivers/ide/ide-floppy.c | 47 |
1 files changed, 1 insertions, 46 deletions
diff --git a/drivers/ide/ide-floppy.c b/drivers/ide/ide-floppy.c index a0a8ad3..38dca45 100644 --- a/drivers/ide/ide-floppy.c +++ b/drivers/ide/ide-floppy.c @@ -208,51 +208,6 @@ static int idefloppy_end_request(ide_drive_t *drive, int uptodate, int nsecs) return 0; } -static void ide_floppy_io_buffers(ide_drive_t *drive, struct ide_atapi_pc *pc, - unsigned int bcount, int direction) -{ - ide_hwif_t *hwif = drive->hwif; - const struct ide_tp_ops *tp_ops = hwif->tp_ops; - xfer_func_t *xf = direction ? tp_ops->output_data : tp_ops->input_data; - struct scatterlist *sg = pc->sg; - char *buf; - int count, done = 0; - - while (bcount) { - count = min(sg->length - pc->b_count, bcount); - if (PageHighMem(sg_page(sg))) { - unsigned long flags; - - local_irq_save(flags); - buf = kmap_atomic(sg_page(sg), KM_IRQ0) + sg->offset; - xf(drive, NULL, buf + pc->b_count, count); - kunmap_atomic(buf - sg->offset, KM_IRQ0); - local_irq_restore(flags); - } else { - buf = sg_virt(sg); - xf(drive, NULL, buf + pc->b_count, count); - } - bcount -= count; - pc->b_count += count; - done += count; - - if (pc->b_count == sg->length) { - if (!--pc->sg_cnt) - break; - pc->sg = sg = sg_next(sg); - pc->b_count = 0; - } - } - - idefloppy_end_request(drive, 1, done >> 9); - - if (bcount) { - printk(KERN_ERR "%s: leftover data in %s, bcount == %d\n", - drive->name, __func__, bcount); - ide_pad_transfer(drive, direction, bcount); - } -} - static void idefloppy_update_buffers(ide_drive_t *drive, struct ide_atapi_pc *pc) { @@ -356,7 +311,7 @@ static ide_startstop_t idefloppy_pc_intr(ide_drive_t *drive) return ide_pc_intr(drive, floppy->pc, idefloppy_pc_intr, IDEFLOPPY_WAIT_CMD, NULL, idefloppy_update_buffers, - idefloppy_retry_pc, NULL, ide_floppy_io_buffers); + idefloppy_retry_pc, NULL, ide_io_buffers); } /* |