2 files changed, 27 insertions, 0 deletions

diff --git a/drivers/scsi/libata-core.c b/drivers/scsi/libata-core.c
index 074a46e5bbdd..f19fe662f0ca 100644
--- a/drivers/scsi/libata-core.c
+++ b/drivers/scsi/libata-core.c
@@ -3612,6 +3612,30 @@ void ata_pio_data_xfer(struct ata_device *adev, unsigned char *buf,
 }
 
 /**
+ *      ata_pio_data_xfer_noirq - Transfer data by PIO
+ *      @adev: device to target
+ *      @buf: data buffer
+ *      @buflen: buffer length
+ *      @write_data: read/write
+ *
+ *      Transfer data from/to the device data register by PIO. Do the 
+ *      transfer with interrupts disabled.
+ *
+ *      LOCKING:
+ *      Inherited from caller.
+ */
+
+void ata_pio_data_xfer_noirq(struct ata_device *adev, unsigned char *buf,
+                                    unsigned int buflen, int write_data)
+{
+        unsigned long flags;
+        local_irq_save(flags);
+        ata_pio_data_xfer(adev, buf, buflen, write_data);
+        local_irq_restore(flags);
+}
+
+
+/**
  *      ata_pio_sector - Transfer ATA_SECT_SIZE (512 bytes) of data.
  *      @qc: Command on going
  *
@@ -5675,6 +5699,7 @@ EXPORT_SYMBOL_GPL(ata_host_stop);
 EXPORT_SYMBOL_GPL(ata_interrupt);
 EXPORT_SYMBOL_GPL(ata_mmio_data_xfer);
 EXPORT_SYMBOL_GPL(ata_pio_data_xfer);
+EXPORT_SYMBOL_GPL(ata_pio_data_xfer_noirq);
 EXPORT_SYMBOL_GPL(ata_qc_prep);
 EXPORT_SYMBOL_GPL(ata_noop_qc_prep);
 EXPORT_SYMBOL_GPL(ata_bmdma_setup);
diff --git a/include/linux/libata.h b/include/linux/libata.h
index 9c60b4a4e2fd..b0ee1c1437d6 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -651,6 +651,8 @@ extern void ata_mmio_data_xfer(struct ata_device *adev, unsigned char *buf,
                                unsigned int buflen, int write_data);
 extern void ata_pio_data_xfer(struct ata_device *adev, unsigned char *buf,
                               unsigned int buflen, int write_data);
+extern void ata_pio_data_xfer_noirq(struct ata_device *adev, unsigned char *buf,
+                              unsigned int buflen, int write_data);
 extern void ata_qc_prep(struct ata_queued_cmd *qc);
 extern void ata_noop_qc_prep(struct ata_queued_cmd *qc);
 extern unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc);