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Commit 75e99585 authored by Alan Cox's avatar Alan Cox Committed by Jeff Garzik
Browse files

[PATCH] libata: add pio_data_xfer_noirq 



Signed-off-by: default avatarAlan Cox <alan@redhat.com>
Signed-off-by: default avatarJeff Garzik <jeff@garzik.org>
parent 622b20fc

drivers/scsi/libata-core.c

+25 −0
Original line number Diff line number Diff line
@@ -3611,6 +3611,30 @@ 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);

include/linux/libata.h

+2 −0
Original line number Diff line number Diff line
@@ -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);