diff options
Diffstat (limited to 'arch/powerpc')
| -rw-r--r-- | arch/powerpc/platforms/powernv/opal-kmsg.c | 24 |
1 files changed, 16 insertions, 8 deletions
diff --git a/arch/powerpc/platforms/powernv/opal-kmsg.c b/arch/powerpc/platforms/powernv/opal-kmsg.c index 6f1214d4de92..f8f41ccce75f 100644 --- a/arch/powerpc/platforms/powernv/opal-kmsg.c +++ b/arch/powerpc/platforms/powernv/opal-kmsg.c @@ -12,6 +12,7 @@ */ #include <linux/kmsg_dump.h> +#include <linux/delay.h> #include <asm/opal.h> #include <asm/opal-api.h> @@ -26,8 +27,7 @@ static void force_opal_console_flush(struct kmsg_dumper *dumper, enum kmsg_dump_reason reason) { - int i; - int64_t ret; + s64 rc; /* * Outside of a panic context the pollers will continue to run, @@ -37,14 +37,22 @@ static void force_opal_console_flush(struct kmsg_dumper *dumper, return; if (opal_check_token(OPAL_CONSOLE_FLUSH)) { - ret = opal_console_flush(0); + do { + rc = OPAL_BUSY; + while (rc == OPAL_BUSY || rc == OPAL_BUSY_EVENT) { + rc = opal_console_flush(0); + if (rc == OPAL_BUSY_EVENT) { + mdelay(OPAL_BUSY_DELAY_MS); + opal_poll_events(NULL); + } else if (rc == OPAL_BUSY) { + mdelay(OPAL_BUSY_DELAY_MS); + } + } + } while (rc == OPAL_PARTIAL); /* More to flush */ - if (ret == OPAL_UNSUPPORTED || ret == OPAL_PARAMETER) - return; - - /* Incrementally flush until there's nothing left */ - while (opal_console_flush(0) != OPAL_SUCCESS); } else { + int i; + /* * If OPAL_CONSOLE_FLUSH is not implemented in the firmware, * the console can still be flushed by calling the polling |