diff options
| author | Mark Brown <broonie@kernel.org> | 2025-11-21 16:57:50 +0000 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2025-11-21 16:57:50 +0000 |
| commit | fba27fe5aaf14e2aae1649a14309b77de2c9546c (patch) | |
| tree | dc55d474e66b25d4b62de0b5ec03474ce917890c /kernel/trace/ring_buffer.c | |
| parent | 670500b41e543c5cb09eb9f7f0e4e26c5b5fdf7e (diff) | |
| parent | 12d821bd13d42e6de3ecb1c13918b1f06a3ee213 (diff) | |
regulator: Add FP9931/JD9930
Merge series from Andreas Kemnade <andreas@kemnade.info>:
Add a driver for the FP9931/JD9930 regulator which provides the
comparatively high voltages needed for electronic paper displays.
Datasheet for the FP9931 is at
https://www.fitipower.com/dl/file/flXa6hIchVeu0W3K
Although it is in English, it seems to be only downloadable
from the Chinese part of that website.
For the JD9930 there can be a datasheet found at
https://e2e.ti.com/cfs-file/__key/communityserver-discussions-components-files/196/JD9930_2D00_0.7_2D00_JUN_2D00_2019.pdf
To simplify things, include the hwmon part directly which is only
one register read and there are not other functions besides
regulators in this chip.
Diffstat (limited to 'kernel/trace/ring_buffer.c')
| -rw-r--r-- | kernel/trace/ring_buffer.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/kernel/trace/ring_buffer.c b/kernel/trace/ring_buffer.c index 1244d2c5c384..afcd3747264d 100644 --- a/kernel/trace/ring_buffer.c +++ b/kernel/trace/ring_buffer.c @@ -7344,6 +7344,10 @@ consume: goto out; } + /* Did the reader catch up with the writer? */ + if (cpu_buffer->reader_page == cpu_buffer->commit_page) + goto out; + reader = rb_get_reader_page(cpu_buffer); if (WARN_ON(!reader)) goto out; |