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| author | Michael Neuling | 2015-12-18 11:46:04 +0100 |
|---|---|---|
| committer | Michael Ellerman | 2015-12-27 09:12:40 +0100 |
| commit | 57a9039052aadf5833c40ab494d30d3755660a48 (patch) | |
| tree | 13586b329f4289956894efa3cbe43d484bbc35ff /arch/powerpc | |
| parent | powerpc/powernv: Add a kmsg_dumper that flushes console output on panic (diff) | |
| download | kernel-qcow2-linux-57a9039052aadf5833c40ab494d30d3755660a48.tar.gz kernel-qcow2-linux-57a9039052aadf5833c40ab494d30d3755660a48.tar.xz kernel-qcow2-linux-57a9039052aadf5833c40ab494d30d3755660a48.zip | |
powerpc/powernv: Only delay opal_rtc_read() retry when necessary
Only delay opal_rtc_read() when busy and are going to retry.
This has the advantage of possibly saving a massive 10ms off booting!
Kudos to Stewart for noticing.
Signed-off-by: Michael Neuling <mikey@neuling.org>
Reviewed-by: Stewart Smith <stewart@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc')
| -rw-r--r-- | arch/powerpc/platforms/powernv/opal-rtc.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/powerpc/platforms/powernv/opal-rtc.c b/arch/powerpc/platforms/powernv/opal-rtc.c index 1b149c92fca1..f8868864f373 100644 --- a/arch/powerpc/platforms/powernv/opal-rtc.c +++ b/arch/powerpc/platforms/powernv/opal-rtc.c @@ -50,7 +50,7 @@ unsigned long __init opal_get_boot_time(void) rc = opal_rtc_read(&__y_m_d, &__h_m_s_ms); if (rc == OPAL_BUSY_EVENT) opal_poll_events(NULL); - else + else if (rc == OPAL_BUSY) mdelay(10); } if (rc != OPAL_SUCCESS) |