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Date: Wed, 18 Jul 2012 18:56:29 -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 61/90] staging: comedi: daqboard2000: cleanup "find pci device" code
The "find pci device" code for this driver was quite a bit
different from the other comedi pci drivers. Clean it up so
it follows the format of the other drivers.
Use for_each_pci_dev() instead of open-coding the loop using
pci_get_device().
Check for a specific bus/slot then the vendor/device ids.
The loop checking for the matching boardinfo was creating an
"id" based on the subsystem_device and subsystem_vendor info
from the pci_dev. The vendor id was already checked so just
check against the subsystem_device.
Only return the pci_dev if a matching boardinfo is found.
Consolidate the dev_err messages when a device is not found
into a single message.
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/daqboard2000.c | 56 ++++++++++-----------------
1 file changed, 20 insertions(+), 36 deletions(-)
diff --git a/drivers/staging/comedi/drivers/daqboard2000.c b/drivers/staging/comedi/drivers/daqboard2000.c
index fe2f39c..eb07466 100644
--- a/drivers/staging/comedi/drivers/daqboard2000.c
+++ b/drivers/staging/comedi/drivers/daqboard2000.c
@@ -120,8 +120,10 @@ Configuration options:
#include "8255.h"
-#define DAQBOARD2000_SUBSYSTEM_IDS2 0x00021616 /* Daqboard/2000 - 2 Dacs */
-#define DAQBOARD2000_SUBSYSTEM_IDS4 0x00041616 /* Daqboard/2000 - 4 Dacs */
+#define PCI_VENDOR_ID_IOTECH 0x1616
+
+#define DAQBOARD2000_SUBSYSTEM_IDS2 0x0002 /* Daqboard/2000 - 2 Dacs */
+#define DAQBOARD2000_SUBSYSTEM_IDS4 0x0004 /* Daqboard/2000 - 4 Dacs */
#define DAQBOARD2000_DAQ_SIZE 0x1002
#define DAQBOARD2000_PLX_SIZE 0x100
@@ -709,47 +711,29 @@ static struct pci_dev *daqboard2000_find_pci_dev(struct comedi_device *dev,
struct pci_dev *pcidev = NULL;
int bus = it->options[0];
int slot = it->options[1];
+ int i;
- for (pcidev = pci_get_device(0x1616, 0x0409, NULL);
- pcidev != NULL; pcidev = pci_get_device(0x1616, 0x0409, pcidev)) {
+ for_each_pci_dev(pcidev) {
if (bus || slot) {
- /* requested particular bus/slot */
- if (pcidev->bus->number != bus ||
- PCI_SLOT(pcidev->devfn) != slot) {
+ if (bus != pcidev->bus->number ||
+ slot != PCI_SLOT(pcidev->devfn))
continue;
- }
}
- break; /* found one */
- }
- if (!pcidev) {
- if (bus || slot)
- dev_err(dev->class_dev,
- "no daqboard2000 found at bus/slot: %d/%d\n",
- bus, slot);
- else
- dev_err(dev->class_dev, "no daqboard2000 found\n");
- return NULL;
- } else {
- u32 id;
- int i;
+ if (pcidev->vendor != PCI_VENDOR_ID_IOTECH ||
+ pcidev->device != 0x0409)
+ continue;
- id = ((u32) pcidev->
- subsystem_device << 16) | pcidev->subsystem_vendor;
for (i = 0; i < ARRAY_SIZE(boardtypes); i++) {
- if (boardtypes[i].id == id) {
- dev_dbg(dev->class_dev, "%s\n",
- boardtypes[i].name);
- dev->board_ptr = boardtypes + i;
- }
- }
- if (!dev->board_ptr) {
- printk
- (" unknown subsystem id %08x (pretend it is an ids2)",
- id);
- dev->board_ptr = boardtypes;
+ if (boardtypes[i].id != pcidev->subsystem_device)
+ continue;
+ dev->board_ptr = boardtypes + i;
+ return pcidev;
}
- return pcidev;
}
+ dev_err(dev->class_dev,
+ "No supported board found! (req. bus %d, slot %d)\n",
+ bus, slot);
+ return NULL;
}
static int daqboard2000_attach(struct comedi_device *dev,
@@ -886,7 +870,7 @@ static void __devexit daqboard2000_pci_remove(struct pci_dev *dev)
}
static DEFINE_PCI_DEVICE_TABLE(daqboard2000_pci_table) = {
- { PCI_DEVICE(0x1616, 0x0409) },
+ { PCI_DEVICE(PCI_VENDOR_ID_IOTECH, 0x0409) },
{ 0 }
};
MODULE_DEVICE_TABLE(pci, daqboard2000_pci_table);
--
1.7.11
--
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