Re: [PATCH 3/3] pata_cmd64x: remove dead CMD646 rev 1 code

[Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>]

Alan Cox wrote:

> On Tue, 11 Oct 2011 19:59:03 +0200
> Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> wrote:
> 
> > From: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
> > Subject: [PATCH] pata_cmd64x: remove dead CMD646 rev 1 code
> > 
> > Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
> 
> You forgot to document why it is dead and why it should be removed

From: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Subject: [PATCH v2] pata_cmd64x: remove dead CMD646 rev 1 code

cmd646r1_bmdma_stop() just calls the standard ata_bmdma_stop()
helper and it has been the case since the driver introduction
by commit 669a5db ("[libata] Add a bunch of PATA drivers.") in
Aug 2006.

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
---
v2: updated patch description

 drivers/ata/pata_cmd64x.c |   33 ++-------------------------------
 1 file changed, 2 insertions(+), 31 deletions(-)

Index: b/drivers/ata/pata_cmd64x.c
===================================================================
--- a/drivers/ata/pata_cmd64x.c
+++ b/drivers/ata/pata_cmd64x.c
@@ -249,18 +249,6 @@ static void cmd648_bmdma_stop(struct ata
 	pci_write_config_byte(pdev, dma_reg, dma_intr | dma_mask);
 }
 
-/**
- *	cmd646r1_dma_stop	-	DMA stop callback
- *	@qc: Command in progress
- *
- *	Stub for now while investigating the r1 quirk in the old driver.
- */
-
-static void cmd646r1_bmdma_stop(struct ata_queued_cmd *qc)
-{
-	ata_bmdma_stop(qc);
-}
-
 static struct scsi_host_template cmd64x_sht = {
 	ATA_BMDMA_SHT(DRV_NAME),
 };
@@ -276,12 +264,6 @@ static struct ata_port_operations cmd64x
 	.cable_detect	= ata_cable_40wire,
 };
 
-static struct ata_port_operations cmd646r1_port_ops = {
-	.inherits	= &cmd64x_base_ops,
-	.bmdma_stop	= cmd646r1_bmdma_stop,
-	.cable_detect	= ata_cable_40wire,
-};
-
 static struct ata_port_operations cmd648_port_ops = {
 	.inherits	= &cmd64x_base_ops,
 	.bmdma_stop	= cmd648_bmdma_stop,
@@ -326,12 +308,6 @@ static int cmd64x_init_one(struct pci_de
 			.udma_mask = ATA_UDMA2,
 			.port_ops = &cmd64x_port_ops
 		},
-		{	/* CMD 646 rev 1  */
-			.flags = ATA_FLAG_SLAVE_POSS,
-			.pio_mask = ATA_PIO4,
-			.mwdma_mask = ATA_MWDMA2,
-			.port_ops = &cmd646r1_port_ops
-		},
 		{	/* CMD 648 */
 			.flags = ATA_FLAG_SLAVE_POSS,
 			.pio_mask = ATA_PIO4,
@@ -374,11 +350,6 @@ static int cmd64x_init_one(struct pci_de
 			ppi[0] = &cmd_info[2];
 			ppi[1] = &cmd_info[2];
 		}
-		/* Early rev with other problems ? */
-		else if (pdev->revision == 1) {
-			ppi[0] = &cmd_info[3];
-			ppi[1] = &cmd_info[3];
-		}
 		/* revs 1,2 have no CNTRL_CH0 */
 		if (pdev->revision < 3)
 			cntrl_ch0_ok = 0;
@@ -423,8 +394,8 @@ static int cmd64x_reinit_one(struct pci_
 static const struct pci_device_id cmd64x[] = {
 	{ PCI_VDEVICE(CMD, PCI_DEVICE_ID_CMD_643), 0 },
 	{ PCI_VDEVICE(CMD, PCI_DEVICE_ID_CMD_646), 1 },
-	{ PCI_VDEVICE(CMD, PCI_DEVICE_ID_CMD_648), 4 },
-	{ PCI_VDEVICE(CMD, PCI_DEVICE_ID_CMD_649), 5 },
+	{ PCI_VDEVICE(CMD, PCI_DEVICE_ID_CMD_648), 3 },
+	{ PCI_VDEVICE(CMD, PCI_DEVICE_ID_CMD_649), 4 },
 
 	{ },
 };