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| author | Uwe Kleine-König <u.kleine-koenig@baylibre.com> | 2026-10-20 15:39:38 +0200 |
|---|---|---|
| committer | Uwe Kleine-König <ukleinek@kernel.org> | 2026-11-02 11:51:58 +0100 |
| commit | 9ad5602d4943635ea2b3b73d1a720161f88da1a1 (patch) | |
| tree | f772f5f60c8d983cf336bd8a21ca6176b3c51571 /scripts/Makefile.thinlto | |
| parent | 83d417d19e62314b97800ae62482607880a8dfe1 (diff) | |
| download | linux-next-9ad5602d4943635ea2b3b73d1a720161f88da1a1.tar.gz linux-next-9ad5602d4943635ea2b3b73d1a720161f88da1a1.zip | |
pwm: tegra: Fix value discarding for duty and period
tegra_pwm_config() is called with u64 values passed for duty_ns and
period_ns in tegra_pwm_apply(). Make these parameters u64 instead of int
to not lose the upper bits for bigger values. If such a discard happens
the values that are written to hardware become wrong, or (if the
discarded period value becomes 0) a division by zero happens.
Adapt the math functions accordingly to not let the now potentially
bigger values result in overflows. While touching these, also limit the
scope of the required_clk_rate variable.
Reported-by: Sashiko <sashiko-bot@kernel.org>
Link: https://sashiko.dev/#/bug/linux-5c5b97d6-4da6-4d06-9dc7-957419dcd832
Fixes: fd3ddd4355c0 ("pwm: tegra: Implement .apply() callback")
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@baylibre.com>
Tested-by: Karl Mehltretter <kmehltretter@gmail.com>
Reviewed-by: Mikko Perttunen <mperttunen@nvidia.com>
Tested-by: Mikko Perttunen <mperttunen@nvidia.com> # Jetson AGX Thor (fan)
Link: https://patch.msgid.link/20261020133938.191013-2-u.kleine-koenig@baylibre.com
Signed-off-by: Uwe Kleine-König <ukleinek@kernel.org>
Diffstat (limited to 'scripts/Makefile.thinlto')
0 files changed, 0 insertions, 0 deletions