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| author | Nicholas Piggin <npiggin@gmail.com> | 2018-05-01 00:55:45 +1000 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2018-07-24 22:09:55 +1000 |
| commit | 36d2dabc8762f1f4118f80d85049958390f061a8 (patch) | |
| tree | d50f769f534f814b169e31c0964d9ba56945dd5b /tools/perf/scripts/python/bin/stackcollapse-report | |
| parent | powerpc/powernv: opal_put_chars partial write fix (diff) | |
| download | linux-36d2dabc8762f1f4118f80d85049958390f061a8.tar.gz linux-36d2dabc8762f1f4118f80d85049958390f061a8.zip | |
powerpc/powernv: Fix OPAL console driver OPAL_BUSY loops
The OPAL console driver does not delay in case it gets OPAL_BUSY or
OPAL_BUSY_EVENT from firmware.
It can't yet be made to sleep because it is called under spinlock,
but it can be changed to the standard OPAL_BUSY loop form, and a
delay added to keep it from hitting the firmware too frequently.
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'tools/perf/scripts/python/bin/stackcollapse-report')
0 files changed, 0 insertions, 0 deletions