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powerpc/powernv: Fix OPAL_CONSOLE_FLUSH prototype and usages

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commit c88c5d43732a0356f99e5e4d1ad62ab1ea516b81 upstream.

The recently added OPAL API call, OPAL_CONSOLE_FLUSH, originally took no
parameters and returned nothing.  The call was updated to accept the
terminal number to flush, and returned various values depending on the
state of the output buffer.

The prototype has been updated and its usage in the OPAL kmsg dumper has
been modified to support its new behaviour as an incremental flush.

Signed-off-by: Russell Currey <ruscur@russell.cc>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Russell Currey 2016-01-13 12:04:32 +11:00 committed by Greg Kroah-Hartman
parent b2cd42d389
commit 6175c8fd13
2 changed files with 9 additions and 2 deletions
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2
arch/powerpc/include/asm/opal.h
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@ -35,7 +35,7 @@ int64_t opal_console_read(int64_t term_number, __be64 *length,
uint8_t *buffer);
int64_t opal_console_write_buffer_space(int64_t term_number,
__be64 *length);
void opal_console_flush(void);
int64_t opal_console_flush(int64_t term_number);
int64_t opal_rtc_read(__be32 *year_month_day,
__be64 *hour_minute_second_millisecond);
int64_t opal_rtc_write(uint32_t year_month_day,

9
arch/powerpc/platforms/powernv/opal-kmsg.c
View File

@ -27,6 +27,7 @@ static void force_opal_console_flush(struct kmsg_dumper *dumper,
enum kmsg_dump_reason reason)
{
int i;
int64_t ret;
/*
* Outside of a panic context the pollers will continue to run,
@ -36,7 +37,13 @@ static void force_opal_console_flush(struct kmsg_dumper *dumper,
return;
if (opal_check_token(OPAL_CONSOLE_FLUSH)) {
opal_console_flush();
ret = opal_console_flush(0);
if (ret == OPAL_UNSUPPORTED || ret == OPAL_PARAMETER)
return;
/* Incrementally flush until there's nothing left */
while (opal_console_flush(0) != OPAL_SUCCESS);
} else {
/*
* If OPAL_CONSOLE_FLUSH is not implemented in the firmware,