This is a note to let you know that I've just added the patch titled
soc: qcom: icc-bwmon: Fix refcount imbalance seen during bwmon_remove
to the 6.10-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
soc-qcom-icc-bwmon-fix-refcount-imbalance-seen-durin.patch
and it can be found in the queue-6.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 291cd445128f8d52469faa28cb96c090c7614c66
Author: Sibi Sankar <quic_sibis@xxxxxxxxxxx>
Date: Thu Jun 13 22:15:06 2024 +0530
soc: qcom: icc-bwmon: Fix refcount imbalance seen during bwmon_remove
[ Upstream commit 24086640ab39396eb1a92d1cb1cd2f31b2677c52 ]
The following warning is seen during bwmon_remove due to refcount
imbalance, fix this by releasing the OPPs after use.
Logs:
WARNING: at drivers/opp/core.c:1640 _opp_table_kref_release+0x150/0x158
Hardware name: Qualcomm Technologies, Inc. X1E80100 CRD (DT)
...
Call trace:
_opp_table_kref_release+0x150/0x158
dev_pm_opp_remove_table+0x100/0x1b4
devm_pm_opp_of_table_release+0x10/0x1c
devm_action_release+0x14/0x20
devres_release_all+0xa4/0x104
device_unbind_cleanup+0x18/0x60
device_release_driver_internal+0x1ec/0x228
driver_detach+0x50/0x98
bus_remove_driver+0x6c/0xbc
driver_unregister+0x30/0x60
platform_driver_unregister+0x14/0x20
bwmon_driver_exit+0x18/0x524 [icc_bwmon]
__arm64_sys_delete_module+0x184/0x264
invoke_syscall+0x48/0x118
el0_svc_common.constprop.0+0xc8/0xe8
do_el0_svc+0x20/0x2c
el0_svc+0x34/0xdc
el0t_64_sync_handler+0x13c/0x158
el0t_64_sync+0x190/0x194
--[ end trace 0000000000000000 ]---
Fixes: 0276f69f13e2 ("soc: qcom: icc-bwmon: Set default thresholds dynamically")
Fixes: b9c2ae6cac40 ("soc: qcom: icc-bwmon: Add bandwidth monitoring driver")
Signed-off-by: Sibi Sankar <quic_sibis@xxxxxxxxxxx>
Reviewed-by: Konrad Dybcio <konrad.dybcio@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20240613164506.982068-1-quic_sibis@xxxxxxxxxxx
Signed-off-by: Bjorn Andersson <andersson@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/soc/qcom/icc-bwmon.c b/drivers/soc/qcom/icc-bwmon.c
index fb323b3364db4..ecddb60bd6650 100644
--- a/drivers/soc/qcom/icc-bwmon.c
+++ b/drivers/soc/qcom/icc-bwmon.c
@@ -565,7 +565,7 @@ static void bwmon_start(struct icc_bwmon *bwmon)
int window;
/* No need to check for errors, as this must have succeeded before. */
- dev_pm_opp_find_bw_ceil(bwmon->dev, &bw_low, 0);
+ dev_pm_opp_put(dev_pm_opp_find_bw_ceil(bwmon->dev, &bw_low, 0));
bwmon_clear_counters(bwmon, true);
@@ -772,11 +772,13 @@ static int bwmon_probe(struct platform_device *pdev)
opp = dev_pm_opp_find_bw_floor(dev, &bwmon->max_bw_kbps, 0);
if (IS_ERR(opp))
return dev_err_probe(dev, PTR_ERR(opp), "failed to find max peak bandwidth\n");
+ dev_pm_opp_put(opp);
bwmon->min_bw_kbps = 0;
opp = dev_pm_opp_find_bw_ceil(dev, &bwmon->min_bw_kbps, 0);
if (IS_ERR(opp))
return dev_err_probe(dev, PTR_ERR(opp), "failed to find min peak bandwidth\n");
+ dev_pm_opp_put(opp);
bwmon->dev = dev;
