luck/tmp_suning_uos_patched
1
0
Fork 1
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Power management fixes for v4.12-rc4

Browse Source 
- Make cpufreq_register_driver() return an error if the ->init()
    calls fail for all CPUs to prevent non-functional drivers from
    hanging around for no reason (David Arcari).
 
  - Make kirkwood-cpufreq check the return value of clk_prepare_enable()
    (which may fail) as appropriate (Arvind Yadav).
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v2
 
 iQIcBAABCAAGBQJZMeVLAAoJEILEb/54YlRxm50QALGQv5EqJExNL9CwRSkcHabU
 VJMxx0Q9hhTuGb9hrQaFCsmE5svcbUpk8w/80nAGvtdRT5w2vB1ssTpJMwE7y407
 8k8DbqEG+Hzk6cjIsMUN2w6n8mWfhWFkk1bzk7xH4xVOcAsJBnfkxlW1cU9viU9G
 FnsEwVmFN5gpZZGwAIqi1Y4GoCpr5xr8mhvTa8D1ofHWfQ/DvroD6uyxd6p3T1cy
 ffXhLxCZAXWkg/RjkVzy+fksLF1A/H/7ylTMjLJzYbzdlf1R73tQ+vLFOJu9RYvT
 xHLU76zozx85LPMxe0MOvuP8yu4Kfy2DOZIBiH3/upBB+I7UzVzuQL0jk1byIGWv
 k5kwvThjJcnF07H0e56tHxq989tDE0RaGg3Mt3JqJ9+ddOKApPa2rDTTv9LtOZOX
 4mjDBdDzQg+N+uec8mGpuH+/Nz5LTJtopPyK7LG2r+KwS1cGMyhoEpolwUpVB9wp
 t/WcKfewm89ROfCrUjRe0+eRiF8DJz3xMsMbYVYHOxVSfWE/M/llQsMxhmrxW1Bw
 jMYzemHziOnYKcSKQtFzgo4/JtDnvx+/2ktlApgcRy9F89I/vjvZfcc3UGCfcd6o
 p46Y26b0cTHxfnBGDZOyHQzrlWFiv6j5wSScFncAJGNzZbNfweGRI+lyoS+IPsEf
 ueBWL3SzN/Tja4FeQ9BO
 =dmsR
 -----END PGP SIGNATURE-----

Merge tag 'pm-4.12-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull power management fixes from Rafael Wysocki:
 "These fix two bugs in error code paths in the cpufreq core and in the
  kirkwood-cpufreq driver.

  Specifics:

   - Make cpufreq_register_driver() return an error if the ->init()
     calls fail for all CPUs to prevent non-functional drivers from
     hanging around for no reason (David Arcari).

   - Make kirkwood-cpufreq check the return value of
     clk_prepare_enable() (which may fail) as appropriate (Arvind
     Yadav)"

* tag 'pm-4.12-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  cpufreq: kirkwood-cpufreq:- Handle return value of clk_prepare_enable()
  cpufreq: cpufreq_register_driver() should return -ENODEV if init fails
This commit is contained in:
Linus Torvalds 2017-06-02 16:33:33 -07:00
commit 89af529a64
2 changed files with 17 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/cpufreq/cpufreq.c
View File

@ -2468,6 +2468,7 @@ int cpufreq_register_driver(struct cpufreq_driver *driver_data)
if (!(cpufreq_driver->flags & CPUFREQ_STICKY) &&
list_empty(&cpufreq_policy_list)) {
/* if all ->init() calls failed, unregister */
ret = -ENODEV;
pr_debug("%s: No CPU initialized for driver %s\n", __func__,
driver_data->name);
goto err_if_unreg;

19
drivers/cpufreq/kirkwood-cpufreq.c
View File

@ -127,7 +127,12 @@ static int kirkwood_cpufreq_probe(struct platform_device *pdev)
return PTR_ERR(priv.cpu_clk);
}
clk_prepare_enable(priv.cpu_clk);
err = clk_prepare_enable(priv.cpu_clk);
if (err) {
dev_err(priv.dev, "Unable to prepare cpuclk\n");
return err;
}
kirkwood_freq_table[0].frequency = clk_get_rate(priv.cpu_clk) / 1000;
priv.ddr_clk = of_clk_get_by_name(np, "ddrclk");
@ -137,7 +142,11 @@ static int kirkwood_cpufreq_probe(struct platform_device *pdev)
goto out_cpu;
}
clk_prepare_enable(priv.ddr_clk);
err = clk_prepare_enable(priv.ddr_clk);
if (err) {
dev_err(priv.dev, "Unable to prepare ddrclk\n");
goto out_cpu;
}
kirkwood_freq_table[1].frequency = clk_get_rate(priv.ddr_clk) / 1000;
priv.powersave_clk = of_clk_get_by_name(np, "powersave");
@ -146,7 +155,11 @@ static int kirkwood_cpufreq_probe(struct platform_device *pdev)
err = PTR_ERR(priv.powersave_clk);
goto out_ddr;
}
clk_prepare_enable(priv.powersave_clk);
err = clk_prepare_enable(priv.powersave_clk);
if (err) {
dev_err(priv.dev, "Unable to prepare powersave clk\n");
goto out_ddr;
}
of_node_put(np);
np = NULL;