linux-toradex.git/drivers/devfreq, branch v4.14-rc7

PM / devfreq: Fix memory leak when fail to register device

2017-08-28T01:31:08+00:00

When the devfreq_add_device fails to register deivce, the memory
leak of devfreq instance happen. So, this patch fix the memory
leak issue. Before freeing the devfreq instance checks whether
devfreq instance is NULL or not because the device_unregister()
frees the devfreq instance when jumping to the 'err_init'.
It is to prevent the duplicate the kfee(devfreq).

Cc: stable@vger.kernel.org
Fixes: ac4b281176a5 ("PM / devfreq: fix duplicated kfree on devfreq pointer")
Signed-off-by: Chanwoo Choi 
Signed-off-by: MyungJoo Ham

PM / devfreq: Add dependency on PM_OPP

2017-08-28T01:23:57+00:00

The devfreq ues the OPP library to handle the voltage and frequency
for the device basically. This patch adds the dependency on CONFIG_PM_OPP
in order to prevent either the build break or the unknow behavior.

Signed-off-by: Chanwoo Choi 
Signed-off-by: MyungJoo Ham

PM / devfreq: Move private devfreq_update_stats() into devfreq

2017-08-28T01:22:27+00:00

THe devfreq_update_stats() updates the 'struct devfreq_dev_status'
in order to get current status of devfreq device. It is only used
for the governors.

This patch moves the devfreq_update_stats() into devfreq directory.

Signed-off-by: Chanwoo Choi 
Signed-off-by: MyungJoo Ham

PM / devfreq: Convert to using %pOF instead of full_name

2017-08-28T00:15:33+00:00

Now that we have a custom printf format specifier, convert users of
full_name to use %pOF instead. This is preparation to remove storing
of the full path string for each node.

Signed-off-by: Rob Herring 
Reviewed-by: Chanwoo Choi 
Signed-off-by: MyungJoo Ham 
Cc: Kyungmin Park 
Cc: linux-pm@vger.kernel.org

PM / devfreq: constify attribute_group structures.

2017-07-06T01:17:24+00:00

attribute_groups are not supposed to change at runtime. All functions
working with attribute_groups provided by  work with const
attribute_group. So mark the non-const structs as const.

File size before:
   text	   data	    bss	    dec	    hex	filename
    621	    176	      0	    797	    31d	drivers/devfreq/governor_userspace.o

File size After adding 'const':
   text	   data	    bss	    dec	    hex	filename
   670	    144	      0	    814	    32e	drivers/devfreq/governor_userspace.o

Signed-off-by: Arvind Yadav 
Reviewed-by: Chanwoo Choi 
Signed-off-by: MyungJoo Ham

PM / devfreq: tegra: fix error return code in tegra_devfreq_probe()

2017-07-06T01:16:17+00:00

platform_get_irq() returns an error code, but the tegra-devfreq
driver ignores it and always returns -ENODEV. This is not correct,
and prevents -EPROBE_DEFER from being propagated properly.

Notice that platform_get_irq() no longer returns 0 on error:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=e330b9a6bb35dc7097a4f02cb1ae7b6f96df92af

Print and propagate the return value of platform_get_irq on failure.

Reviewed-by: Chanwoo Choi 
Signed-off-by: Gustavo A. R. Silva 
Signed-off-by: MyungJoo Ham

PM / devfreq: rk3399_dmc: fix error return code in rk3399_dmcfreq_probe()

2017-07-06T01:15:22+00:00

platform_get_irq() returns an error code, but the rk3399_dmc
driver ignores it and always returns -EINVAL. This is not correct,
and prevents -EPROBE_DEFER from being propagated properly.

Notice that platform_get_irq() no longer returns 0 on error:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=e330b9a6bb35dc7097a4f02cb1ae7b6f96df92af

Print and propagate the return value of platform_get_irq on failure.

Reviewed-by: Chanwoo Choi 
Signed-off-by: Gustavo A. R. Silva 
Signed-off-by: MyungJoo Ham

PM / devfreq: exynos-ppmu: Staticize event list

2017-06-12T01:12:07+00:00

The ppmu_events array is accessed only in this compilation unit so it
can be made static.

Signed-off-by: Krzysztof Kozlowski 
Acked-by: Chanwoo Choi 
Signed-off-by: MyungJoo Ham

PM / devfreq: exynos-ppmu: Handle return value of clk_prepare_enable

2017-06-12T01:12:07+00:00

clk_prepare_enable() can fail here and we must check its return value.

Signed-off-by: Arvind Yadav 
Signed-off-by: MyungJoo Ham

PM / devfreq: exynos-nocp: Handle return value of clk_prepare_enable

2017-06-12T01:12:07+00:00

clk_prepare_enable() can fail here and we must check its return value.

Signed-off-by: Arvind Yadav 
Signed-off-by: MyungJoo Ham