[SCSI] Change Kconfig option from IOMAPPED to MMIO

Most of the Kconfig options for switching between IO Port and MMIO
operations use the opposite sense from sym2.  Really, this option
should be set at a chipset level rather than per-driver.
Signed-off-by: Matthew Wilcox <matthew@wil.cx>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

drivers/scsi/Kconfig

@@ -1079,7 +1079,7 @@ config SCSI_SYM53C8XX_DMA_ADDRESSING_MODE
 	  memory using PCI DAC cycles.
 
 config SCSI_SYM53C8XX_DEFAULT_TAGS
-	int "default tagged command queue depth"
+	int "Default tagged command queue depth"
 	depends on SCSI_SYM53C8XX_2
 	default "16"
 	help
@@ -1090,7 +1090,7 @@ config SCSI_SYM53C8XX_DEFAULT_TAGS
 	  exceed CONFIG_SCSI_SYM53C8XX_MAX_TAGS.
 
 config SCSI_SYM53C8XX_MAX_TAGS
-	int "maximum number of queued commands"
+	int "Maximum number of queued commands"
 	depends on SCSI_SYM53C8XX_2
 	default "64"
 	help
@@ -1099,13 +1099,14 @@ config SCSI_SYM53C8XX_MAX_TAGS
 	  possible. The driver supports up to 256 queued commands per device.
 	  This value is used as a compiled-in hard limit.
 
-config SCSI_SYM53C8XX_IOMAPPED
-	bool "use port IO"
+config SCSI_SYM53C8XX_MMIO
+	bool "Use memory mapped IO"
 	depends on SCSI_SYM53C8XX_2
+	default y
 	help
-	  If you say Y here, the driver will use port IO to access
-	  the card.  This is significantly slower then using memory
-	  mapped IO.  Most people should answer N.
+	  Memory mapped IO is faster than Port IO.  Most people should
+	  answer Y here, but some machines may have problems.  If you have
+	  to answer N here, please report the problem to the maintainer.
 
 config SCSI_IPR
 	tristate "IBM Power Linux RAID adapter support"

drivers/scsi/sym53c8xx_2/sym_glue.c

@@ -1874,7 +1874,7 @@ sym_init_device(struct pci_dev *pdev, struct sym_device *device)
 	i = pci_get_base_address(pdev, 1, &device->mmio_base);
 	pci_get_base_address(pdev, i, &device->ram_base);
 
-#ifndef CONFIG_SCSI_SYM53C8XX_IOMAPPED
+#ifdef CONFIG_SCSI_SYM53C8XX_MMIO
 	if (device->mmio_base)
 		device->s.ioaddr = pci_iomap(pdev, 1,
 						pci_resource_len(pdev, 1));

drivers/scsi/sym53c8xx_2/sym_hipd.c

@@ -973,8 +973,8 @@ static int sym_prepare_setting(struct Scsi_Host *shost, struct sym_hcb *np, stru
  *
  *  Has to be called with interrupts disabled.
  */
-#ifndef CONFIG_SCSI_SYM53C8XX_IOMAPPED
-static int sym_regtest (struct sym_hcb *np)
+#ifdef CONFIG_SCSI_SYM53C8XX_MMIO
+static int sym_regtest(struct sym_hcb *np)
 {
 	register volatile u32 data;
 	/*
@@ -992,20 +992,25 @@ static int sym_regtest (struct sym_hcb *np)
 #endif
 		printf ("CACHE TEST FAILED: reg dstat-sstat2 readback %x.\n",
 			(unsigned) data);
-		return (0x10);
+		return 0x10;
 	}
-	return (0);
+	return 0;
+}
+#else
+static inline int sym_regtest(struct sym_hcb *np)
+{
+	return 0;
 }
 #endif
 
-static int sym_snooptest (struct sym_hcb *np)
+static int sym_snooptest(struct sym_hcb *np)
 {
-	u32	sym_rd, sym_wr, sym_bk, host_rd, host_wr, pc, dstat;
-	int	i, err=0;
-#ifndef CONFIG_SCSI_SYM53C8XX_IOMAPPED
-	err |= sym_regtest (np);
-	if (err) return (err);
-#endif
+	u32 sym_rd, sym_wr, sym_bk, host_rd, host_wr, pc, dstat;
+	int i, err;
+
+	err = sym_regtest(np);
+	if (err)
+		return err;
 restart_test:
 	/*
 	 *  Enable Master Parity Checking as we intend 
@@ -1094,7 +1099,7 @@ restart_test:
 		err |= 4;
 	}
 
-	return (err);
+	return err;
 }
 
 /*