evie/android_kernel_oneplus_msm8998
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qos: Add NULL checking for irq descriptor

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Check for NULL for irq descriptor to prevent deferencing an invalid
address.  The qos value is then ignored as it cannot be associated with
the requested irq.

Change-Id: I82fdc9b10ffff89032a0f0e9dade42e4c670f4b9
Signed-off-by: Mahesh Sivasubramanian <msivasub@codeaurora.org>
This commit is contained in:
Mahesh Sivasubramanian 2017-01-31 14:26:12 -07:00
parent 3a7e752617
commit 466165aa64
1 changed files with 5 additions and 1 deletions
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6
kernel/power/qos.c
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@ -597,7 +597,11 @@ void pm_qos_add_request(struct pm_qos_request *req,
case PM_QOS_REQ_AFFINE_IRQ:
if (irq_can_set_affinity(req->irq)) {
struct irq_desc *desc = irq_to_desc(req->irq);
struct cpumask *mask = desc->irq_data.common->affinity;
struct cpumask *mask;
if (!desc)
return;
mask = desc->irq_data.common->affinity;
/* Get the current affinity */
cpumask_copy(&req->cpus_affine, mask);