diff options
Diffstat (limited to 'drivers/misc/pvpanic.c')
| -rw-r--r-- | drivers/misc/pvpanic.c | 30 |
1 files changed, 29 insertions, 1 deletions
diff --git a/drivers/misc/pvpanic.c b/drivers/misc/pvpanic.c index 80cdfa8f951a..b1e4922a7fda 100644 --- a/drivers/misc/pvpanic.c +++ b/drivers/misc/pvpanic.c @@ -20,6 +20,7 @@ static void __iomem *base; static unsigned int capability = PVPANIC_PANICKED | PVPANIC_CRASH_LOADED; +static unsigned int events; static ssize_t capability_show(struct device *dev, struct device_attribute *attr, char *buf) @@ -28,8 +29,34 @@ static ssize_t capability_show(struct device *dev, } static DEVICE_ATTR_RO(capability); +static ssize_t events_show(struct device *dev, struct device_attribute *attr, char *buf) +{ + return sysfs_emit(buf, "%x", events); +} + +static ssize_t events_store(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + unsigned int tmp; + int err; + + err = kstrtouint(buf, 16, &tmp); + if (err) + return err; + + if ((tmp & capability) != tmp) + return -EINVAL; + + events = tmp; + + return count; + +} +static DEVICE_ATTR_RW(events); + static struct attribute *pvpanic_dev_attrs[] = { &dev_attr_capability.attr, + &dev_attr_events.attr, NULL }; ATTRIBUTE_GROUPS(pvpanic_dev); @@ -41,7 +68,7 @@ MODULE_LICENSE("GPL"); static void pvpanic_send_event(unsigned int event) { - if (event & capability) + if (event & capability & events) iowrite8(event, base); } @@ -90,6 +117,7 @@ static int pvpanic_mmio_probe(struct platform_device *pdev) /* initlize capability by RDPT */ capability &= ioread8(base); + events = capability; if (capability) atomic_notifier_chain_register(&panic_notifier_list, |