atp870u: Remove scam_on from struct atp_unit

scam_on is used only during probe, no need to keep it later.
Signed-off-by: NOndrej Zary <linux@rainbow-software.org>
Reviewed-by: NHannes Reinicke <hare@suse.de>
Acked-by: NChristoph Hellwig <hch@lst.de>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/atp870u.c

@@ -963,7 +963,7 @@ static unsigned char fun_scam(struct atp_unit *dev, unsigned short int *val)
 	return j;
 }
 
-static void tscam(struct Scsi_Host *host, bool wide_chip)
+static void tscam(struct Scsi_Host *host, bool wide_chip, u8 scam_on)
 {
 
 	unsigned char i, j, k;
@@ -986,7 +986,7 @@ static void tscam(struct Scsi_Host *host, bool wide_chip)
 	atp_writeb_io(dev, 0, 2, 0x7f);
 	atp_writeb_io(dev, 0, 0x11, 0x20);
 
-	if ((dev->scam_on & 0x40) == 0) {
+	if ((scam_on & 0x40) == 0) {
 		return;
 	}
 	m = 1;
@@ -1311,7 +1311,6 @@ static int atp870u_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 			"    IO:%lx, IRQ:%d.\n", shpnt->io_port, shpnt->irq);
 		atpdev->host_id[0] = host_id;
 
-		atpdev->scam_on = atp_readb_base(atpdev, 0x22);
 		atpdev->global_map[0] = atp_readb_base(atpdev, 0x35);
 		atpdev->ultra_map[0] = atp_readw_base(atpdev, 0x3c);
 
@@ -1384,7 +1383,7 @@ static int atp870u_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 
 		atp_set_host_id(atpdev, 0, host_id);
 
-		tscam(shpnt, true);
+		tscam(shpnt, true, atp_readb_base(atpdev, 0x22));
 		atp_is(atpdev, 0, true, atp_readb_base(atpdev, 0x3f) & 0x40);
 		atp_writeb_base(atpdev, 0x38, 0xb0);
 		shpnt->max_id = 16;
@@ -1509,6 +1508,7 @@ static int atp870u_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 		shpnt->max_channel = 1;
 		shpnt->this_id = atpdev->host_id[0];
 	} else {
+		u8 scam_on;
 		bool wide_chip =
 			(ent->device == PCI_DEVICE_ID_ARTOP_AEC7610 &&
 			 pdev->revision == 4) ||
@@ -1523,12 +1523,12 @@ static int atp870u_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 		atpdev->pciport[0] = shpnt->io_port + 0x20;
 		host_id &= 0x07;
 		atpdev->host_id[0] = host_id;
-		atpdev->scam_on = atp_readb_pci(atpdev, 0, 2);
+		scam_on = atp_readb_pci(atpdev, 0, 2);
 		atpdev->global_map[0] = atp_readb_base(atpdev, 0x2d);
 		atpdev->ultra_map[0] = atp_readw_base(atpdev, 0x2e);
 
 		if (atpdev->ultra_map[0] == 0) {
-			atpdev->scam_on = 0x00;
+			scam_on = 0x00;
 			atpdev->global_map[0] = 0x20;
 			atpdev->ultra_map[0] = 0xffff;
 		}
@@ -1551,7 +1551,7 @@ static int atp870u_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 		atp_set_host_id(atpdev, 0, host_id);
 
 
-		tscam(shpnt, wide_chip);
+		tscam(shpnt, wide_chip, scam_on);
 		atp_writeb_base(atpdev, 0x3a, atp_readb_base(atpdev, 0x3a) | 0x10);
 		atp_is(atpdev, 0, wide_chip, 0);
 		atp_writeb_base(atpdev, 0x3a, atp_readb_base(atpdev, 0x3a) & 0xef);

drivers/scsi/atp870u.h

@@ -32,7 +32,6 @@ struct atp_unit
 	unsigned char quhd[2];
 	unsigned char quend[2];
 	unsigned char global_map[2];
-	unsigned char scam_on;
 	unsigned char host_id[2];
 	unsigned int working[2];
 	unsigned short wide_id[2];