PCI/AER: Add uevents in AER and EEH error/resume

Devices can go offline when erors 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 and
AER events are better propagated to user space for PCI devices in all
arches.

Signed-off-by: Bryant G. Ly <bryantly@linux.vnet.ibm.com>
Signed-off-by: Juan J. Alvarez <jjalvare@linux.vnet.ibm.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Russell Currey <ruscur@russell.cc>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

1 files changed, 6 insertions, 0 deletions

diff --git a/arch/powerpc/kernel/eeh_driver.c b/arch/powerpc/kernel/eeh_driver.c
index 3c0fa99c5533..beea2182d754 100644
--- a/arch/powerpc/kernel/eeh_driver.c
+++ b/arch/powerpc/kernel/eeh_driver.c
@@ -228,6 +228,7 @@ static void *eeh_report_error(void *data, void *userdata)
 
 	edev->in_error = true;
 	eeh_pcid_put(dev);
+	pci_uevent_ers(dev, PCI_ERS_RESULT_NONE);
 	return NULL;
 }
 
@@ -381,6 +382,10 @@ static void *eeh_report_resume(void *data, void *userdata)
 	driver->err_handler->resume(dev);
 
 	eeh_pcid_put(dev);
+	pci_uevent_ers(dev, PCI_ERS_RESULT_RECOVERED);
+#ifdef CONFIG_PCI_IOV
+	eeh_ops->notify_resume(eeh_dev_to_pdn(edev));
+#endif
 	return NULL;
 }
 
@@ -416,6 +421,7 @@ static void *eeh_report_failure(void *data, void *userdata)
 	driver->err_handler->error_detected(dev, pci_channel_io_perm_failure);
 
 	eeh_pcid_put(dev);
+	pci_uevent_ers(dev, PCI_ERS_RESULT_DISCONNECT);
 	return NULL;
 }