Patchwork [v2] pata_hpt37x: fold 'if' statement into 'switch'

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Submitter Sergei Shtylyov
Date Jan. 10, 2011, 7:31 p.m.
Message ID <201101102231.13495.sshtylyov@ru.mvista.com>
Download mbox | patch
Permalink /patch/78197/
State Not Applicable
Delegated to: David Miller
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Comments

Sergei Shtylyov - Jan. 10, 2011, 7:31 p.m.
hpt37x_init_one() has a large *if* statement which should really be folded into
the *switch* statement that currently constitutes its *else* branch, reducing
one level of indentation...

Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>

---
The patch is against the recent Linus' tree plus 2 patches I posted
before:

http://marc.info/?l=linux-ide&m=129468455026976
http://marc.info/?l=linux-ide&m=129468485927420

 drivers/ata/pata_hpt37x.c |   89 ++++++++++++++++++++++------------------------
 1 file changed, 43 insertions(+), 46 deletions(-)

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Sergei Shtylyov - Jan. 10, 2011, 7:34 p.m.
Hello.

I wrote:

> hpt37x_init_one() has a large *if* statement which should really be folded into
> the *switch* statement that currently constitutes its *else* branch, reducing
> one level of indentation...

> Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>

    Disregard "v2" in the subject -- forgot to remove it, when modifying the 
previous mail. :-)

WBR, Sergei
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Jeff Garzik - Jan. 19, 2011, 1 a.m.
On 01/10/2011 02:31 PM, Sergei Shtylyov wrote:
> hpt37x_init_one() has a large *if* statement which should really be folded into
> the *switch* statement that currently constitutes its *else* branch, reducing
> one level of indentation...
>
> Signed-off-by: Sergei Shtylyov<sshtylyov@ru.mvista.com>
>
> ---
> The patch is against the recent Linus' tree plus 2 patches I posted
> before:
>
> http://marc.info/?l=linux-ide&m=129468455026976
> http://marc.info/?l=linux-ide&m=129468485927420
>
>   drivers/ata/pata_hpt37x.c |   89 ++++++++++++++++++++++------------------------
>   1 file changed, 43 insertions(+), 46 deletions(-)

applied this, and the prereset inherit patch


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Patch

Index: linux-2.6/drivers/ata/pata_hpt37x.c
===================================================================
--- linux-2.6.orig/drivers/ata/pata_hpt37x.c
+++ linux-2.6/drivers/ata/pata_hpt37x.c
@@ -24,7 +24,7 @@ 
 #include <linux/libata.h>
 
 #define DRV_NAME	"pata_hpt37x"
-#define DRV_VERSION	"0.6.20"
+#define DRV_VERSION	"0.6.21"
 
 struct hpt_clock {
 	u8	xfer_speed;
@@ -838,7 +838,8 @@  static int hpt37x_init_one(struct pci_de
 	if (rc)
 		return rc;
 
-	if (dev->device == PCI_DEVICE_ID_TTI_HPT366) {
+	switch (dev->device) {
+	case PCI_DEVICE_ID_TTI_HPT366:
 		/* May be a later chip in disguise. Check */
 		/* Older chips are in the HPT366 driver. Ignore them */
 		if (rev < 3)
@@ -867,50 +868,46 @@  static int hpt37x_init_one(struct pci_de
 			       "please report (%d).\n", rev);
 			return -ENODEV;
 		}
-	} else {
-		switch (dev->device) {
-		case PCI_DEVICE_ID_TTI_HPT372:
-			/* 372N if rev >= 2 */
-			if (rev >= 2)
-				return -ENODEV;
-			ppi[0] = &info_hpt372;
-			chip_table = &hpt372a;
-			break;
-		case PCI_DEVICE_ID_TTI_HPT302:
-			/* 302N if rev > 1 */
-			if (rev > 1)
-				return -ENODEV;
-			ppi[0] = &info_hpt302;
-			/* Check this */
-			chip_table = &hpt302;
-			break;
-		case PCI_DEVICE_ID_TTI_HPT371:
-			if (rev > 1)
-				return -ENODEV;
-			ppi[0] = &info_hpt302;
-			chip_table = &hpt371;
-			/*
-			 * Single channel device, master is not present
-			 * but the BIOS (or us for non x86) must mark it
-			 * absent
-			 */
-			pci_read_config_byte(dev, 0x50, &mcr1);
-			mcr1 &= ~0x04;
-			pci_write_config_byte(dev, 0x50, mcr1);
-			break;
-		case PCI_DEVICE_ID_TTI_HPT374:
-			chip_table = &hpt374;
-			if (!(PCI_FUNC(dev->devfn) & 1))
-				*ppi = &info_hpt374_fn0;
-			else
-				*ppi = &info_hpt374_fn1;
-			break;
-		default:
-			pr_err(DRV_NAME
-			       ": PCI table is bogus, please report (%d).\n",
-			       dev->device);
-				return -ENODEV;
-		}
+		break;
+	case PCI_DEVICE_ID_TTI_HPT372:
+		/* 372N if rev >= 2 */
+		if (rev >= 2)
+			return -ENODEV;
+		ppi[0] = &info_hpt372;
+		chip_table = &hpt372a;
+		break;
+	case PCI_DEVICE_ID_TTI_HPT302:
+		/* 302N if rev > 1 */
+		if (rev > 1)
+			return -ENODEV;
+		ppi[0] = &info_hpt302;
+		/* Check this */
+		chip_table = &hpt302;
+		break;
+	case PCI_DEVICE_ID_TTI_HPT371:
+		if (rev > 1)
+			return -ENODEV;
+		ppi[0] = &info_hpt302;
+		chip_table = &hpt371;
+		/*
+		 * Single channel device, master is not present but the BIOS
+		 * (or us for non x86) must mark it absent
+		 */
+		pci_read_config_byte(dev, 0x50, &mcr1);
+		mcr1 &= ~0x04;
+		pci_write_config_byte(dev, 0x50, mcr1);
+		break;
+	case PCI_DEVICE_ID_TTI_HPT374:
+		chip_table = &hpt374;
+		if (!(PCI_FUNC(dev->devfn) & 1))
+			*ppi = &info_hpt374_fn0;
+		else
+			*ppi = &info_hpt374_fn1;
+		break;
+	default:
+		pr_err(DRV_NAME ": PCI table is bogus, please report (%d).\n",
+		       dev->device);
+		return -ENODEV;
 	}
 	/* Ok so this is a chip we support */