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[PATCH] PCI: Bus Parity Status sysfs interface

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From: Doug Thompson <norsk5@yahoo.com>

This patch adds the 'broken_parity_status' sysfs attribute file to a PCI device.
Reading this attribute a userland program can determine if PCI device provides false
positives (value of 1) in its generation of PCI Parity status, or not (value of 0).
As PCI devices are found to be 'bad' in this regard, userland programs can also set
the appropriate value (root access only) of a faulty device. This per device
information will be used in the EDAC PCI Parity scanner code in a future patch once
this interface becomes available.

Signed-off-by: Doug Thompson <norsk5@yahoo.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Doug Thompson 2006-06-14 16:59:48 -07:00 committed by Greg Kroah-Hartman
parent acc7c2e0b7
commit bdee9d98d2
1 changed files with 24 additions and 0 deletions
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24
drivers/pci/pci-sysfs.c
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@ -45,6 +45,28 @@ pci_config_attr(class, "0x%06x\n");
pci_config_attr(irq, "%u\n");
pci_config_attr(is_enabled, "%u\n");
static ssize_t broken_parity_status_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct pci_dev *pdev = to_pci_dev(dev);
return sprintf (buf, "%u\n", pdev->broken_parity_status);
}
static ssize_t broken_parity_status_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct pci_dev *pdev = to_pci_dev(dev);
ssize_t consumed = -EINVAL;
if ((count > 0) && (*buf == '0' || *buf == '1')) {
pdev->broken_parity_status = *buf == '1' ? 1 : 0;
consumed = count;
}
return consumed;
}
static ssize_t local_cpus_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
@ -122,6 +144,8 @@ struct device_attribute pci_dev_attrs[] = {
__ATTR_RO(local_cpus),
__ATTR_RO(modalias),
__ATTR(enable, 0600, is_enabled_show, is_enabled_store),
__ATTR(broken_parity_status,(S_IRUGO|S_IWUSR),
broken_parity_status_show,broken_parity_status_store),
__ATTR_NULL,
};