[POWERPC] Assorted janitorial EEH cleanups

Assorted minor cleanups to EEH code; -- use literals, use
kerneldoc format.

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

----
 arch/powerpc/platforms/pseries/eeh.c        |   13 ++++++++++---
 arch/powerpc/platforms/pseries/eeh_driver.c |    7 ++++---
 include/asm-powerpc/ppc-pci.h               |   18 +++++++++++++++---
 3 files changed, 29 insertions(+), 9 deletions(-)
Signed-off-by: Paul Mackerras <paulus@samba.org>

2 files changed, 14 insertions, 6 deletions

diff --git a/arch/powerpc/platforms/pseries/eeh.c b/arch/powerpc/platforms/pseries/eeh.c
index 093438b93bd..5f3e6d8659f 100644
--- a/arch/powerpc/platforms/pseries/eeh.c
+++ b/arch/powerpc/platforms/pseries/eeh.c
@@ -76,7 +76,7 @@
  */
 #define EEH_MAX_FAILS	2100000
 
-/* Time to wait for a PCI slot to retport status, in milliseconds */
+/* Time to wait for a PCI slot to report status, in milliseconds */
 #define PCI_BUS_RESET_WAIT_MSEC (60*1000)
 
 /* RTAS tokens */
@@ -95,11 +95,18 @@ EXPORT_SYMBOL(eeh_subsystem_enabled);
 /* Lock to avoid races due to multiple reports of an error */
 static DEFINE_SPINLOCK(confirm_error_lock);
 
-/* Buffer for reporting slot-error-detail rtas calls */
+/* Buffer for reporting slot-error-detail rtas calls. Its here
+ * in BSS, and not dynamically alloced, so that it ends up in
+ * RMO where RTAS can access it.
+ */
 static unsigned char slot_errbuf[RTAS_ERROR_LOG_MAX];
 static DEFINE_SPINLOCK(slot_errbuf_lock);
 static int eeh_error_buf_size;
 
+/* Buffer for reporting pci register dumps. Its here in BSS, and
+ * not dynamically alloced, so that it ends up in RMO where RTAS
+ * can access it.
+ */
 #define EEH_PCI_REGS_LOG_LEN 4096
 static unsigned char pci_regs_buf[EEH_PCI_REGS_LOG_LEN];
 
@@ -218,7 +225,7 @@ static size_t gather_pci_data(struct pci_dn *pdn, char * buf, size_t len)
 void eeh_slot_error_detail(struct pci_dn *pdn, int severity)
 {
 	size_t loglen = 0;
-	memset(pci_regs_buf, 0, EEH_PCI_REGS_LOG_LEN);
+	pci_regs_buf[0] = 0;
 
 	rtas_pci_enable(pdn, EEH_THAW_MMIO);
 	loglen = gather_pci_data(pdn, pci_regs_buf, EEH_PCI_REGS_LOG_LEN);
diff --git a/arch/powerpc/platforms/pseries/eeh_driver.c b/arch/powerpc/platforms/pseries/eeh_driver.c
index f07d849cfc8..161a5844ab6 100644
--- a/arch/powerpc/platforms/pseries/eeh_driver.c
+++ b/arch/powerpc/platforms/pseries/eeh_driver.c
@@ -378,8 +378,9 @@ struct pci_dn * handle_eeh_events (struct eeh_event *event)
 
 	/* Since rtas may enable MMIO when posting the error log,
 	 * don't post the error log until after all dev drivers
-	 * have been informed. */
-	eeh_slot_error_detail(frozen_pdn, 1 /* Temporary Error */);
+	 * have been informed.
+	 */
+	eeh_slot_error_detail(frozen_pdn, EEH_LOG_TEMP_FAILURE);
 
 	/* If all device drivers were EEH-unaware, then shut
 	 * down all of the device drivers, and hope they
@@ -470,7 +471,7 @@ hard_fail:
 		location, drv_str, pci_str);
 
 perm_error:
-	eeh_slot_error_detail(frozen_pdn, 2 /* Permanent Error */);
+	eeh_slot_error_detail(frozen_pdn, EEH_LOG_PERM_FAILURE);
 
 	/* Notify all devices that they're about to go down. */
 	pci_walk_bus(frozen_bus, eeh_report_failure, NULL);