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| author | Sebastian Ott <sebott@linux.vnet.ibm.com> | 2013-08-29 21:35:19 +0400 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2013-08-30 10:57:12 +0400 |
| commit | 0ff70ec88ba61f72b05b365a21fbd8aa60436254 (patch) | |
| tree | 0e45820fc2aaf256dc758a4ea4f83f6a2f961546 /arch/s390/pci/pci_sysfs.c | |
| parent | cb8091828757bbc9459ef59248f4a793e681f8cd (diff) | |
| download | linux-0ff70ec88ba61f72b05b365a21fbd8aa60436254.tar.xz | |
s390/pci: add recover sysfs knob
Add an arch specific attribute to recover a pci function from an
error state or config space blockage.
Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/pci/pci_sysfs.c')
| -rw-r--r-- | arch/s390/pci/pci_sysfs.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/arch/s390/pci/pci_sysfs.c b/arch/s390/pci/pci_sysfs.c index e99a2557f186..cf8a12ff733b 100644 --- a/arch/s390/pci/pci_sysfs.c +++ b/arch/s390/pci/pci_sysfs.c @@ -48,11 +48,38 @@ static ssize_t show_pfgid(struct device *dev, struct device_attribute *attr, } static DEVICE_ATTR(pfgid, S_IRUGO, show_pfgid, NULL); +static void recover_callback(struct device *dev) +{ + struct pci_dev *pdev = to_pci_dev(dev); + struct zpci_dev *zdev = get_zdev(pdev); + int ret; + + pci_stop_and_remove_bus_device(pdev); + ret = zpci_disable_device(zdev); + if (ret) + return; + + ret = zpci_enable_device(zdev); + if (ret) + return; + + pci_rescan_bus(zdev->bus); +} + +static ssize_t store_recover(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + int rc = device_schedule_callback(dev, recover_callback); + return rc ? rc : count; +} +static DEVICE_ATTR(recover, S_IWUSR, NULL, store_recover); + static struct device_attribute *zpci_dev_attrs[] = { &dev_attr_function_id, &dev_attr_function_handle, &dev_attr_pchid, &dev_attr_pfgid, + &dev_attr_recover, NULL, }; |