linux-kernel - [PATCH 24/30] staging: comedi: dyna_pci10xx: cleanup the "find pci device" code

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Date:	Wed, 11 Jul 2012 15:32:23 -0700
From:	H Hartley Sweeten <hartleys@...ionengravers.com>
To:	Linux Kernel <linux-kernel@...r.kernel.org>
CC:	<devel@...verdev.osuosl.org>, <abbotti@....co.uk>,
	<gregkh@...uxfoundation.org>
Subject: [PATCH 24/30] staging: comedi: dyna_pci10xx: cleanup the "find pci device" code

Cleanup the "find pci device" code to follow the format of the
other comedi pci drivers.

Use for_each_pci_dev() instead of open-coding the for loop. Reorder
and refactor some of the tests to reduce the indent level. Change
the printk's to dev_printk's.

Signed-off-by: H Hartley Sweeten <hsweeten@...ionengravers.com>
Cc: Ian Abbott <abbotti@....co.uk>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/staging/comedi/drivers/dyna_pci10xx.c | 60 +++++++--------------------
 1 file changed, 16 insertions(+), 44 deletions(-)

diff --git a/drivers/staging/comedi/drivers/dyna_pci10xx.c b/drivers/staging/comedi/drivers/dyna_pci10xx.c
index e189f71..d8ce5da 100644
--- a/drivers/staging/comedi/drivers/dyna_pci10xx.c
+++ b/drivers/staging/comedi/drivers/dyna_pci10xx.c
@@ -233,56 +233,28 @@ static struct pci_dev *dyna_pci10xx_find_pci_dev(struct comedi_device *dev,
 						 struct comedi_devconfig *it)
 {
 	struct pci_dev *pcidev = NULL;
-	unsigned int opt_bus = it->options[0];
-	unsigned int opt_slot = it->options[1];
-	int board_index;
+	unsigned int bus = it->options[0];
+	unsigned int slot = it->options[1];
 	int i;
 
-	for (pcidev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, NULL);
-		pcidev != NULL;
-		pcidev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, pcidev)) {
-
-		board_index = -1;
-		for (i = 0; i < ARRAY_SIZE(boardtypes); ++i) {
-			if ((pcidev->vendor == PCI_VENDOR_ID_DYNALOG) &&
-				(pcidev->device == boardtypes[i].device_id)) {
-					board_index = i;
-					dev->board_ptr = &boardtypes[board_index];
-					break;
-				}
-		}
-		if (board_index < 0)
+	for_each_pci_dev(pcidev) {
+		if (pcidev->vendor != PCI_VENDOR_ID_DYNALOG)
 			continue;
-
-		/* Found matching vendor/device. */
-		if (opt_bus || opt_slot) {
-			/* Check bus/slot. */
-			if (opt_bus != pcidev->bus->number
-			    || opt_slot != PCI_SLOT(pcidev->devfn))
-				continue;	/* no match */
+		if (bus || slot) {
+			if (bus != pcidev->bus->number ||
+			    slot != PCI_SLOT(pcidev->devfn))
+				continue;
 		}
-
-		goto found;
-	}
-	printk(KERN_ERR "comedi: dyna_pci10xx: no supported device found!\n");
-	return NULL;
-
-found:
-
-	if (!pcidev) {
-		if (opt_bus || opt_slot) {
-			printk(KERN_ERR "comedi: dyna_pci10xx: "
-				"invalid PCI device at b:s %d:%d\n",
-				opt_bus, opt_slot);
-		} else {
-			printk(KERN_ERR "comedi: dyna_pci10xx: "
-				"invalid PCI device\n");
+		for (i = 0; i < ARRAY_SIZE(boardtypes); i++) {
+			if (pcidev->device == boardtypes[i].device_id) {
+				dev->board_ptr = &boardtypes[i];
+				dev_dbg(dev->class_dev, "device found!\n");
+				return pcidev;
+			}
 		}
-		return NULL;
 	}
-
-	printk(KERN_INFO "comedi: dyna_pci10xx: device found!\n");
-	return pcidev;
+	dev_err(dev->class_dev, "no supported device found!\n");
+	return NULL;
 }
 
 static int dyna_pci10xx_attach(struct comedi_device *dev,
-- 
1.7.11

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