[PATCH v2 2/7] powerpc/kernel: Add uevents in EEH error/resume

["Bryant G. Ly" <bryantly@xxxxxxxxxxxxxxxxxx>]

Devices can go offline when EEH is reported. This patch adds
a change to the kernel object and lets udev know of error.
When device resumes a change is also set reporting device as
online. Therefore, EEH events are better propagated to user
space for devices in powerpc arch.

Signed-off-by: Bryant G. Ly <bryantly@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Juan J. Alvarez <jjalvare@xxxxxxxxxxxxxxxxxx>
---
 arch/powerpc/kernel/eeh_driver.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/arch/powerpc/kernel/eeh_driver.c b/arch/powerpc/kernel/eeh_driver.c
index 3c0fa99c5533..9d4e8177c2e0 100644
--- a/arch/powerpc/kernel/eeh_driver.c
+++ b/arch/powerpc/kernel/eeh_driver.c
@@ -204,6 +204,7 @@ static void *eeh_report_error(void *data, void *userdata)
 	struct pci_dev *dev = eeh_dev_to_pci_dev(edev);
 	enum pci_ers_result rc, *res = userdata;
 	struct pci_driver *driver;
+	char *envp[] = {"EVENT=EEH_ERROR", "ONLINE=0", NULL};
 
 	if (!dev || eeh_dev_removed(edev) || eeh_pe_passed(edev->pe))
 		return NULL;
@@ -228,6 +229,7 @@ static void *eeh_report_error(void *data, void *userdata)
 
 	edev->in_error = true;
 	eeh_pcid_put(dev);
+	kobject_uevent_env(&dev->dev.kobj, KOBJ_CHANGE, envp);
 	return NULL;
 }
 
@@ -358,6 +360,7 @@ static void *eeh_report_resume(void *data, void *userdata)
 	struct pci_dev *dev = eeh_dev_to_pci_dev(edev);
 	bool was_in_error;
 	struct pci_driver *driver;
+	char *envp[] = {"EVENT=EEH_RESUME", "ONLINE=1", NULL};
 
 	if (!dev || eeh_dev_removed(edev) || eeh_pe_passed(edev->pe))
 		return NULL;
@@ -381,6 +384,7 @@ static void *eeh_report_resume(void *data, void *userdata)
 	driver->err_handler->resume(dev);
 
 	eeh_pcid_put(dev);
+	kobject_uevent_env(&dev->dev.kobj, KOBJ_CHANGE, envp);
 	return NULL;
 }
 
@@ -397,6 +401,7 @@ static void *eeh_report_failure(void *data, void *userdata)
 	struct eeh_dev *edev = (struct eeh_dev *)data;
 	struct pci_dev *dev = eeh_dev_to_pci_dev(edev);
 	struct pci_driver *driver;
+	char * envp[] = {"EVENT=EEH_PERMANENT_FAILURE", "ONLINE=0", NULL};
 
 	if (!dev || eeh_dev_removed(edev) || eeh_pe_passed(edev->pe))
 		return NULL;
@@ -415,6 +420,7 @@ static void *eeh_report_failure(void *data, void *userdata)
 
 	driver->err_handler->error_detected(dev, pci_channel_io_perm_failure);
 
+	kobject_uevent_env(&dev->dev.kobj, KOBJ_CHANGE, envp);
 	eeh_pcid_put(dev);
 	return NULL;
 }
-- 
2.14.3 (Apple Git-98)