1b147bec1a
Refresh ipq806x target patches for kernel 5.15. Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
35 lines
1.3 KiB
Diff
35 lines
1.3 KiB
Diff
From 57e00b40033a376de3f3cf0bb9bf7590d2dd679d Mon Sep 17 00:00:00 2001
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From: Christian 'Ansuel' Marangi <ansuelsmth@gmail.com>
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Date: Tue, 14 Jun 2022 13:06:59 +0200
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Subject: [PATCH 1/1] PM / devfreq: Fix kernel panic with cpu based scaling to
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passive gov
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The cpufreq passive register notifier can PROBE_DEFER and the devfreq
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struct is freed and then reallocaed on probe retry.
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The current logic assume that the code can't PROBE_DEFER so the devfreq
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struct in the this variable in devfreq_passive_data is assumed to be
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(if already set) always correct.
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This cause kernel panic as the code try to access the wrong address.
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To correctly handle this, update the this variable in
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devfreq_passive_data to the devfreq reallocated struct.
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Fixes: a03dacb0316f ("PM / devfreq: Add cpu based scaling support to passive governor")
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Signed-off-by: Christian 'Ansuel' Marangi <ansuelsmth@gmail.com>
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Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
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---
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drivers/devfreq/governor_passive.c | 3 +--
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1 file changed, 1 insertion(+), 2 deletions(-)
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--- a/drivers/devfreq/governor_passive.c
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+++ b/drivers/devfreq/governor_passive.c
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@@ -401,8 +401,7 @@ static int devfreq_passive_event_handler
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if (!p_data)
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return -EINVAL;
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- if (!p_data->this)
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- p_data->this = devfreq;
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+ p_data->this = devfreq;
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switch (event) {
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case DEVFREQ_GOV_START:
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