diff options
author | Ulf Hansson <ulf.hansson@linaro.org> | 2018-11-01 15:22:38 +0300 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-11-21 11:19:23 +0300 |
commit | 110e9082dc64e152b845d910276a60be617bf9ca (patch) | |
tree | c0280bfbc79443c07b0a74ad2ccca2edd1441c67 | |
parent | 0d406e7972dd47c54959281782e05f52c8a10c95 (diff) | |
download | linux-110e9082dc64e152b845d910276a60be617bf9ca.tar.xz |
ARM: cpuidle: Don't register the driver when back-end init returns -ENXIO
commit 763f191af51f127cf8e69cd361f50bf6180768a5 upstream.
There's no point to register the cpuidle driver for the current CPU, when
the initialization of the arch specific back-end data fails by returning
-ENXIO.
Instead, let's re-order the sequence to its original flow, by first trying
to initialize the back-end part and then act accordingly on the returned
error code. Additionally, let's print the error message, no matter of what
error code that was returned.
Fixes: a0d46a3dfdc3 (ARM: cpuidle: Register per cpuidle device)
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Reviewed-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Cc: 4.19+ <stable@vger.kernel.org> # v4.19+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r-- | drivers/cpuidle/cpuidle-arm.c | 22 |
1 files changed, 10 insertions, 12 deletions
diff --git a/drivers/cpuidle/cpuidle-arm.c b/drivers/cpuidle/cpuidle-arm.c index 073557f433eb..df564d783216 100644 --- a/drivers/cpuidle/cpuidle-arm.c +++ b/drivers/cpuidle/cpuidle-arm.c @@ -103,13 +103,6 @@ static int __init arm_idle_init_cpu(int cpu) goto out_kfree_drv; } - ret = cpuidle_register_driver(drv); - if (ret) { - if (ret != -EBUSY) - pr_err("Failed to register cpuidle driver\n"); - goto out_kfree_drv; - } - /* * Call arch CPU operations in order to initialize * idle states suspend back-end specific data @@ -117,15 +110,20 @@ static int __init arm_idle_init_cpu(int cpu) ret = arm_cpuidle_init(cpu); /* - * Skip the cpuidle device initialization if the reported + * Allow the initialization to continue for other CPUs, if the reported * failure is a HW misconfiguration/breakage (-ENXIO). */ - if (ret == -ENXIO) - return 0; - if (ret) { pr_err("CPU %d failed to init idle CPU ops\n", cpu); - goto out_unregister_drv; + ret = ret == -ENXIO ? 0 : ret; + goto out_kfree_drv; + } + + ret = cpuidle_register_driver(drv); + if (ret) { + if (ret != -EBUSY) + pr_err("Failed to register cpuidle driver\n"); + goto out_kfree_drv; } dev = kzalloc(sizeof(*dev), GFP_KERNEL); |