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-rw-r--r--drivers/scsi/ide-scsi.c28
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++;