[PATCH] libata: Code for the IRQ mask flag

Signed-off-by: Alan Cox <alan@redhat.com>

Somewhat cleaner in the resync as someone cleaned up the pio xfer users
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>

1 files changed, 15 insertions, 4 deletions

diff --git a/drivers/scsi/libata-core.c b/drivers/scsi/libata-core.c
index 0a2936a140c8..46c4cdbaee86 100644
--- a/drivers/scsi/libata-core.c
+++ b/drivers/scsi/libata-core.c
@@ -3097,10 +3097,21 @@ static void ata_pio_data_xfer(struct ata_port *ap, unsigned char *buf,
 static void ata_data_xfer(struct ata_port *ap, unsigned char *buf,
                           unsigned int buflen, int do_write)
 {
-        if (ap->flags & ATA_FLAG_MMIO)
-                ata_mmio_data_xfer(ap, buf, buflen, do_write);
-        else
-                ata_pio_data_xfer(ap, buf, buflen, do_write);
+        /* Make the crap hardware pay the costs not the good stuff */
+        if (unlikely(ap->flags & ATA_FLAG_IRQ_MASK)) {
+                unsigned long flags;
+                local_irq_save(flags);
+                if (ap->flags & ATA_FLAG_MMIO)
+                        ata_mmio_data_xfer(ap, buf, buflen, do_write);
+                else
+                        ata_pio_data_xfer(ap, buf, buflen, do_write);
+                local_irq_restore(flags);
+        } else {
+                if (ap->flags & ATA_FLAG_MMIO)
+                        ata_mmio_data_xfer(ap, buf, buflen, do_write);
+                else
+                        ata_pio_data_xfer(ap, buf, buflen, do_write);
+        }
 }
 
 /**