From: John W. Linville <linville@tuxdriver.com>
Date: Wed, 28 Sep 2005 21:50:51 +0000 (-0400)
Subject: [PATCH] pci: cleanup need_restore switch statement
X-Git-Tag: v2.6.15-rc1~731^2~22^2~25
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=d3535fbbce0eef8faa8de30d187fc83b11b858ef;p=profile%2Fivi%2Fkernel-x86-ivi.git

[PATCH] pci: cleanup need_restore switch statement

Cleanup the need_restore switch statement in
pci_set_power_state(). This makes it more safe by explicitly handling
all the PCI power states instead of handling them as the default
case. It also reads a little better IMHO.

Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---

diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index 259d247..39bdb93 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -314,19 +314,19 @@ pci_set_power_state(struct pci_dev *dev, pci_power_t state)
 	 * sets PowerState to 0.
 	 */
 	switch (dev->current_state) {
+	case PCI_D0:
+	case PCI_D1:
+	case PCI_D2:
+		pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
+		pmcsr |= state;
+		break;
 	case PCI_UNKNOWN: /* Boot-up */
 		if ((pmcsr & PCI_PM_CTRL_STATE_MASK) == PCI_D3hot
 		 && !(pmcsr & PCI_PM_CTRL_NO_SOFT_RESET))
 			need_restore = 1;
 		/* Fall-through: force to D0 */
-	case PCI_D3hot:
-	case PCI_D3cold:
-	case PCI_POWER_ERROR:
-		pmcsr = 0;
-		break;
 	default:
-		pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
-		pmcsr |= state;
+		pmcsr = 0;
 		break;
 	}