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SubjectRe: [PATCH]: powerpc: pseries: Print PCI slot location code on failure
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On Fri, Jun 16, 2006 at 08:42:20AM +1000, Paul Mackerras wrote:
> Linas Vepstas writes:
>
> > Resending an older patch (from 28 April) that seems to have fallen
> > through the cracks, its not in mailine, is not in -mm and its not
> > controversial (its mostly a printk change). Tested.
>
> I don't like doing printk on things that might be NULL (i.e. the
> result of get_property). Even though printk doesn't crash, it would
> be nicer for the user to see "location=unknown" or something rather
> than "location=<NULL>".

Right. Revised patch below.
--------------
[PATCH]: powerpc/pseries: Print PCI slot location code on failure

The PCI error recovery code will printk diagnostic info when
a PCI error event occurs. Change the messages to include the slot
location code, which is how most sysadmins will know the device.

Signed-off-by: Linas Vepstas <linas@austin.ibm.com>

----
arch/powerpc/platforms/pseries/eeh_driver.c | 35 +++++++++++++++++-----------
1 files changed, 22 insertions(+), 13 deletions(-)
Index: linux-2.6.17-rc6-mm2/arch/powerpc/platforms/pseries/eeh_driver.c
===================================================================
--- linux-2.6.17-rc6-mm2.orig/arch/powerpc/platforms/pseries/eeh_driver.c 2006-06-13 18:13:26.000000000 -0500
+++ linux-2.6.17-rc6-mm2/arch/powerpc/platforms/pseries/eeh_driver.c 2006-06-16 13:51:44.000000000 -0500
@@ -261,16 +261,22 @@ struct pci_dn * handle_eeh_events (struc
struct pci_bus *frozen_bus;
int rc = 0;
enum pci_ers_result result = PCI_ERS_RESULT_NONE;
- const char *pci_str, *drv_str;
+ const char *location, *pci_str, *drv_str;

frozen_dn = find_device_pe(event->dn);
frozen_bus = pcibios_find_pci_bus(frozen_dn);

if (!frozen_dn) {
- printk(KERN_ERR "EEH: Error: Cannot find partition endpoint for %s\n",
- pci_name(event->dev));
+
+ location = (char *) get_property(event->dn, "ibm,loc-code", NULL);
+ location = location ? location : "unknown";
+ printk(KERN_ERR "EEH: Error: Cannot find partition endpoint "
+ "for location=%s pci addr=%s\n",
+ location, pci_name(event->dev));
return NULL;
}
+ location = (char *) get_property(frozen_dn, "ibm,loc-code", NULL);
+ location = location ? location : "unknown";

/* There are two different styles for coming up with the PE.
* In the old style, it was the highest EEH-capable device
@@ -282,8 +288,9 @@ struct pci_dn * handle_eeh_events (struc
frozen_bus = pcibios_find_pci_bus (frozen_dn->parent);

if (!frozen_bus) {
- printk(KERN_ERR "EEH: Cannot find PCI bus for %s\n",
- frozen_dn->full_name);
+ printk(KERN_ERR "EEH: Cannot find PCI bus "
+ "for location=%s dn=%s\n",
+ location, frozen_dn->full_name);
return NULL;
}

@@ -318,8 +325,9 @@ struct pci_dn * handle_eeh_events (struc

eeh_slot_error_detail(frozen_pdn, 1 /* Temporary Error */);
printk(KERN_WARNING
- "EEH: This PCI device has failed %d times since last reboot: %s - %s\n",
- frozen_pdn->eeh_freeze_count, drv_str, pci_str);
+ "EEH: This PCI device has failed %d times since last reboot: "
+ "location=%s driver=%s pci addr=%s\n",
+ frozen_pdn->eeh_freeze_count, location, drv_str, pci_str);

/* Walk the various device drivers attached to this slot through
* a reset sequence, giving each an opportunity to do what it needs
@@ -368,17 +376,18 @@ excess_failures:
* due to actual, failed cards.
*/
printk(KERN_ERR
- "EEH: PCI device %s - %s has failed %d times \n"
- "and has been permanently disabled. Please try reseating\n"
- "this device or replacing it.\n",
- drv_str, pci_str, frozen_pdn->eeh_freeze_count);
+ "EEH: PCI device at location=%s driver=%s pci addr=%s \n"
+ "has failed %d times and has been permanently disabled. \n"
+ "Please try reseating this device or replacing it.\n",
+ location, drv_str, pci_str, frozen_pdn->eeh_freeze_count);
goto perm_error;

hard_fail:
printk(KERN_ERR
- "EEH: Unable to recover from failure of PCI device %s - %s\n"
+ "EEH: Unable to recover from failure of PCI device "
+ "at location=%s driver=%s pci addr=%s \n"
"Please try reseating this device or replacing it.\n",
- drv_str, pci_str);
+ location, drv_str, pci_str);

perm_error:
eeh_slot_error_detail(frozen_pdn, 2 /* Permanent Error */);
-
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