[POWERPC] pseries: Fix jumbled no_logging flag

Get rid of the jumbled usage of the no_logging flag. Its use
spans several directories, and is incorrectly/misleadingly
documented. Instead, two changes:
1) nvram will accept error log as soon as its ready.
2) logging to nvram stops on the first fatal error reported.

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

----
 arch/powerpc/kernel/nvram_64.c         |    8 --------
 arch/powerpc/platforms/pseries/rtasd.c |   14 ++++++--------
 2 files changed, 6 insertions(+), 16 deletions(-)
Signed-off-by: Paul Mackerras <paulus@samba.org>

1 files changed, 6 insertions, 8 deletions

diff --git a/arch/powerpc/platforms/pseries/rtasd.c b/arch/powerpc/platforms/pseries/rtasd.c
index d902097646b7..b802a272bd29 100644
--- a/arch/powerpc/platforms/pseries/rtasd.c
+++ b/arch/powerpc/platforms/pseries/rtasd.c
@@ -53,7 +53,8 @@ static unsigned int rtas_event_scan_rate;
 
 static int full_rtas_msgs = 0;
 
-extern int no_logging;
+/* Stop logging to nvram after first fatal error */
+static int no_more_logging;
 
 volatile int error_log_cnt = 0;
 
@@ -216,7 +217,7 @@ void pSeries_log_error(char *buf, unsigned int err_type, int fatal)
         }
 
         /* Write error to NVRAM */
-        if (!no_logging && !(err_type & ERR_FLAG_BOOT))
+        if (!no_more_logging && !(err_type & ERR_FLAG_BOOT))
                 nvram_write_error_log(buf, len, err_type);
 
         /*
@@ -228,8 +229,8 @@ void pSeries_log_error(char *buf, unsigned int err_type, int fatal)
                 printk_log_rtas(buf, len);
 
         /* Check to see if we need to or have stopped logging */
-        if (fatal || no_logging) {
-                no_logging = 1;
+        if (fatal || no_more_logging) {
+                no_more_logging = 1;
                 spin_unlock_irqrestore(&rtasd_log_lock, s);
                 return;
         }
@@ -301,7 +302,7 @@ static ssize_t rtas_log_read(struct file * file, char __user * buf,
 
         spin_lock_irqsave(&rtasd_log_lock, s);
         /* if it's 0, then we know we got the last one (the one in NVRAM) */
-        if (rtas_log_size == 0 && !no_logging)
+        if (rtas_log_size == 0 && !no_more_logging)
                 nvram_clear_error_log();
         spin_unlock_irqrestore(&rtasd_log_lock, s);
 
@@ -413,9 +414,6 @@ static int rtasd(void *unused)
         memset(logdata, 0, rtas_error_log_max);
         rc = nvram_read_error_log(logdata, rtas_error_log_max, &err_type);
 
-        /* We can use rtas_log_buf now */
-        no_logging = 0;
-
         if (!rc) {
                 if (err_type != ERR_FLAG_ALREADY_LOGGED) {
                         pSeries_log_error(logdata, err_type | ERR_FLAG_BOOT, 0);