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PCI Hotplug: cpqphp: refactor cpqhp_probe

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Apply DeMorgan's theorem:

	if ((pdev->revision > 2) || (vendor_id == PCI_VENDOR_ID_INTEL))

turns into

	if ((pdev->revision <= 2) && (vendor_id != PCI_VENDOR_ID_INTEL))

Now we can bail out early from the function if the controller is not
supported.

This allows us to un-indent the remainder of the function quite a bit and
make it much more readable.

Fix up some extra braces, and un-indent the 'case' labels in the switch
statement as per CodingStyle.

No functional change.

Signed-off-by: Alex Chiang <achiang@hp.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
This commit is contained in:
Alex Chiang
2009-03-31 09:23:36 -06:00
committed by Jesse Barnes
parent 04225fe7e6
commit 867556fe74
1 changed files with 195 additions and 207 deletions
Download Patch File Download Diff File Expand all files Collapse all files

66
drivers/pci/hotplug/cpqphp_core.c
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@@ -887,7 +887,11 @@ static int cpqhpc_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
* For Intel, each SSID bit identifies a PHP capability.
* Also Intel HPC's may have RID=0.
*/
if ((pdev->revision > 2) || (vendor_id == PCI_VENDOR_ID_INTEL)) {
if ((pdev->revision <= 2) && (vendor_id != PCI_VENDOR_ID_INTEL)) {
err(msg_HPC_not_supported);
return -ENODEV;
}
/* TODO: This code can be made to support non-Compaq or Intel
* subsystem IDs
*/
@@ -1021,64 +1025,53 @@ static int cpqhpc_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
case PCI_VENDOR_ID_INTEL:
/* Check for speed capability (0=33, 1=66) */
if (subsystem_deviceid & 0x0001) {
if (subsystem_deviceid & 0x0001)
ctrl->speed_capability = PCI_SPEED_66MHz;
} else {
else
ctrl->speed_capability = PCI_SPEED_33MHz;
}
/* Check for push button */
if (subsystem_deviceid & 0x0002) {
/* no push button */
if (subsystem_deviceid & 0x0002)
ctrl->push_button = 0;
} else {
/* push button supported */
else
ctrl->push_button = 1;
}
/* Check for slot switch type (0=mechanical, 1=not mechanical) */
if (subsystem_deviceid & 0x0004) {
/* no switch */
if (subsystem_deviceid & 0x0004)
ctrl->slot_switch_type = 0;
} else {
/* switch */
else
ctrl->slot_switch_type = 1;
}
/* PHP Status (0=De-feature PHP, 1=Normal operation) */
if (subsystem_deviceid & 0x0008) {
if (subsystem_deviceid & 0x0008)
ctrl->defeature_PHP = 1; /* PHP supported */
} else {
else
ctrl->defeature_PHP = 0; /* PHP not supported */
}
/* Alternate Base Address Register Interface (0=not supported, 1=supported) */
if (subsystem_deviceid & 0x0010) {
ctrl->alternate_base_address = 1; /* supported */
} else {
ctrl->alternate_base_address = 0; /* not supported */
}
/* Alternate Base Address Register Interface
* (0=not supported, 1=supported)
*/
if (subsystem_deviceid & 0x0010)
ctrl->alternate_base_address = 1;
else
ctrl->alternate_base_address = 0;
/* PCI Config Space Index (0=not supported, 1=supported) */
if (subsystem_deviceid & 0x0020) {
ctrl->pci_config_space = 1; /* supported */
} else {
ctrl->pci_config_space = 0; /* not supported */
}
if (subsystem_deviceid & 0x0020)
ctrl->pci_config_space = 1;
else
ctrl->pci_config_space = 0;
/* PCI-X support */
if (subsystem_deviceid & 0x0080) {
/* PCI-X capable */
ctrl->pcix_support = 1;
/* Frequency of operation in PCI-X mode */
if (subsystem_deviceid & 0x0040) {
if (subsystem_deviceid & 0x0040)
/* 133MHz PCI-X if bit 7 is 1 */
ctrl->pcix_speed_capability = 1;
} else {
else
/* 100MHz PCI-X if bit 7 is 1 and bit 0 is 0, */
/* 66MHz PCI-X if bit 7 is 1 and bit 0 is 1 */
ctrl->pcix_speed_capability = 0;
}
} else {
/* Conventional PCI */
ctrl->pcix_support = 0;
@@ -1092,11 +1085,6 @@ static int cpqhpc_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
goto err_free_ctrl;
}
} else {
err(msg_HPC_not_supported);
return -ENODEV;
}
/* Tell the user that we found one. */
info("Initializing the PCI hot plug controller residing on PCI bus %d\n",
pdev->bus->number);
@@ -1164,7 +1152,7 @@ static int cpqhpc_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
goto err_free_mem_region;
}
// Check for 66Mhz operation
/* Check for 66Mhz operation */
ctrl->speed = get_controller_speed(ctrl);