user/sven/linux.git/drivers/opp/core.c, branch v5.9.2

opp: Prevent memory leak in dev_pm_opp_attach_genpd()

2020-10-29T09:12:16Z

[ Upstream commit cb60e9602cce1593eb1e9cdc8ee562815078a354 ] If dev_pm_opp_attach_genpd() is called multiple times (once for each CPU sharing the table), then it would result in unwanted behavior like memory leak, attaching the domain multiple times, etc. Handle that by checking and returning earlier if the domains are already attached. Now that dev_pm_opp_detach_genpd() can get called multiple times as well, we need to protect that too. Note that the virtual device pointers aren't returned in this case, as they may become unavailable to some callers during the middle of the operation. Reported-by: Stephan Gerhold Signed-off-by: Viresh Kumar Signed-off-by: Sasha Levin

Merge branch 'opp/fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/vireshk/pm

2020-09-01T17:44:20Z

Pull operating performance points (OPP) framework fixes for 5.9-rc4 from Viresh Kumar: "This fixes reference counting for OPP tables. Few patches are getting queued (for various subsystems) for 5.10 which depend on this to be fixed first." * 'opp/fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/vireshk/pm: opp: Don't drop reference for an OPP table that was never parsed

opp: Don't drop reference for an OPP table that was never parsed

2020-08-31T09:19:47Z

dev_pm_opp_remove_table() should drop a reference to the OPP table only if the DT OPP table was parsed earlier with a call to dev_pm_opp_of_add_table() earlier. Else it may end up dropping the reference to the OPP table, which was added as a result of other calls like dev_pm_opp_set_clkname(). And would hence result in undesirable behavior later on when caller would try to free the resource again. Fixes: 03758d60265c ("opp: Replace list_kref with a local counter") Reported-by: Naresh Kamboju Reported-by: Anders Roxell Tested-by: Naresh Kamboju Signed-off-by: Viresh Kumar

opp: Enable resources again if they were disabled earlier

2020-08-20T06:00:22Z

dev_pm_opp_set_rate() can now be called with freq = 0 in order to either drop performance or bandwidth votes or to disable regulators on platforms which support them. In such cases, a subsequent call to dev_pm_opp_set_rate() with the same frequency ends up returning early because 'old_freq == freq' Instead make it fall through and put back the dropped performance and bandwidth votes and/or enable back the regulators. Cc: v5.3+ # v5.3+ Fixes: cd7ea582866f ("opp: Make dev_pm_opp_set_rate() handle freq = 0 to drop performance votes") Reported-by: Sajida Bhanu Reviewed-by: Sibi Sankar Reported-by: Matthias Kaehlcke Tested-by: Matthias Kaehlcke Reviewed-by: Stephen Boyd Signed-off-by: Rajendra Nayak [ Viresh: Don't skip clk_set_rate() and massaged changelog ] Signed-off-by: Viresh Kumar

opp: Put opp table in dev_pm_opp_set_rate() if _set_opp_bw() fails

2020-08-17T05:07:10Z

We get the opp_table pointer at the top of the function and so we should put the pointer at the end of the function like all other exit paths from this function do. Cc: v5.8+ # v5.8+ Fixes: b00e667a6d8b ("opp: Remove bandwidth votes when target_freq is zero") Reviewed-by: Rajendra Nayak Signed-off-by: Stephen Boyd [ Viresh: Split the patch into two ] Signed-off-by: Viresh Kumar

opp: Put opp table in dev_pm_opp_set_rate() for empty tables

2020-08-17T05:07:10Z

We get the opp_table pointer at the top of the function and so we should put the pointer at the end of the function like all other exit paths from this function do. Cc: v5.7+ # v5.7+ Fixes: aca48b61f963 ("opp: Manage empty OPP tables with clk handle") Reviewed-by: Rajendra Nayak Signed-off-by: Stephen Boyd [ Viresh: Split the patch into two ] Signed-off-by: Viresh Kumar

Merge branch 'cpufreq/arm/linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/vireshk/pm

2020-08-04T10:44:53Z

Pull ARM cpufreq driver changes for v5.9-rc1 from Viresh Kumar: "Here are the details: - Adaptive voltage scaling (AVS) support and minor cleanups for brcmstb driver (Florian Fainelli and Markus Mayer). - A new tegra driver and cleanup for the existing one (Sumit Gupta and Jon Hunter). - Bandwidth level support for Qcom driver along with OPP changes (Sibi Sankar). - Cleanups to sti, cpufreq-dt, ap806, CPPC drivers (Viresh Kumar, Lee Jones, Ivan Kokshaysky, Sven Auhagen, and Xin Hao). - Make schedutil default governor for ARM (Valentin Schneider). - Fix dependency issues for imx (Walter Lozano). - Cleanup around cached_resolved_idx in cpufreq core (Viresh Kumar)." * 'cpufreq/arm/linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/vireshk/pm: cpufreq: make schedutil the default for arm and arm64 cpufreq: cached_resolved_idx can not be negative cpufreq: Add Tegra194 cpufreq driver dt-bindings: arm: Add NVIDIA Tegra194 CPU Complex binding cpufreq: imx: Select NVMEM_IMX_OCOTP cpufreq: sti-cpufreq: Fix some formatting and misspelling issues cpufreq: tegra186: Simplify probe return path cpufreq: CPPC: Reuse caps variable in few routines cpufreq: ap806: fix cpufreq driver needs ap cpu clk cpufreq: cppc: Reorder code and remove apply_hisi_workaround variable cpufreq: dt: fix oops on armada37xx cpufreq: brcmstb-avs-cpufreq: send S2_ENTER / S2_EXIT commands to AVS cpufreq: brcmstb-avs-cpufreq: Support polling AVS firmware cpufreq: brcmstb-avs-cpufreq: more flexible interface for __issue_avs_command() cpufreq: qcom: Disable fast switch when scaling DDR/L3 cpufreq: qcom: Update the bandwidth levels on frequency change OPP: Add and export helper to set bandwidth cpufreq: blacklist SC7180 in cpufreq-dt-platdev cpufreq: blacklist SDM845 in cpufreq-dt-platdev

OPP: Add and export helper to set bandwidth

2020-07-30T05:12:15Z

Add and export 'dev_pm_opp_set_bw' to set the bandwidth levels associated with an OPP. Signed-off-by: Sibi Sankar Signed-off-by: Viresh Kumar

opp: Allow disabled OPPs in dev_pm_opp_get_freq()

2020-07-24T02:35:54Z

Allow dev_pm_opp_get_freq() to work for disabled OPPs. Signed-off-by: Andrew-sh.Cheng [ Viresh: Massaged commit log ] Signed-off-by: Viresh Kumar

opp: core: Add missing export for dev_pm_opp_adjust_voltage

2020-07-24T02:35:53Z

Export dev_pm_opp_adjust_voltage() as it may be used by modules later on. Signed-off-by: Valdis Kletnieks [ Viresh: Rewrote commit log ] Signed-off-by: Viresh Kumar