diff options
| -rw-r--r-- | drivers/scsi/ide-scsi.c | 28 |
1 files changed, 24 insertions, 4 deletions
diff --git a/drivers/scsi/ide-scsi.c b/drivers/scsi/ide-scsi.c index d80c4c9d5a6..83f062ed908 100644 --- a/drivers/scsi/ide-scsi.c +++ b/drivers/scsi/ide-scsi.c @@ -179,8 +179,18 @@ static void idescsi_input_buffers (ide_drive_t *drive, idescsi_pc_t *pc, unsigne return; } count = min(pc->sg->length - pc->b_count, bcount); - buf = page_address(pc->sg->page) + pc->sg->offset; - drive->hwif->atapi_input_bytes(drive, buf + pc->b_count, count); + if (PageHighMem(pc->sg->page)) { + unsigned long flags; + + local_irq_save(flags); + buf = kmap_atomic(pc->sg->page, KM_IRQ0) + pc->sg->offset; + drive->hwif->atapi_input_bytes(drive, buf + pc->b_count, count); + kunmap_atomic(buf - pc->sg->offset, KM_IRQ0); + local_irq_restore(flags); + } else { + buf = page_address(pc->sg->page) + pc->sg->offset; + drive->hwif->atapi_input_bytes(drive, buf + pc->b_count, count); + } bcount -= count; pc->b_count += count; if (pc->b_count == pc->sg->length) { pc->sg++; @@ -201,8 +211,18 @@ static void idescsi_output_buffers (ide_drive_t *drive, idescsi_pc_t *pc, unsign return; } count = min(pc->sg->length - pc->b_count, bcount); - buf = page_address(pc->sg->page) + pc->sg->offset; - drive->hwif->atapi_output_bytes(drive, buf + pc->b_count, count); + if (PageHighMem(pc->sg->page)) { + unsigned long flags; + + local_irq_save(flags); + buf = kmap_atomic(pc->sg->page, KM_IRQ0) + pc->sg->offset; + drive->hwif->atapi_output_bytes(drive, buf + pc->b_count, count); + kunmap_atomic(buf - pc->sg->offset, KM_IRQ0); + local_irq_restore(flags); + } else { + buf = page_address(pc->sg->page) + pc->sg->offset; + drive->hwif->atapi_output_bytes(drive, buf + pc->b_count, count); + } bcount -= count; pc->b_count += count; if (pc->b_count == pc->sg->length) { pc->sg++; |