On Tue, Aug 27, 2019 at 05:09:27PM +0800, Ming Lei wrote: > On Tue, Aug 27, 2019 at 11:06:20AM +0200, Johannes Thumshirn wrote: > > On 27/08/2019 10:53, Ming Lei wrote: > > [...] > > > + char *devname; > > > + const struct cpumask *mask; > > > + unsigned long irqflags = IRQF_SHARED; > > > + int vector = pci_irq_vector(pdev, nvmeq->cq_vector); > > > + > > > + devname = kasprintf(GFP_KERNEL, "nvme%dq%d", nr, nvmeq->qid); > > > + if (!devname) > > > + return -ENOMEM; > > > + > > > + mask = pci_irq_get_affinity(pdev, nvmeq->cq_vector); > > > + if (mask && cpumask_weight(mask) > 1) > > > + irqflags |= IRQF_RESCUE_THREAD; > > > + > > > + return request_threaded_irq(vector, nvme_irq, NULL, irqflags, > > > + devname, nvmeq); > > > > This will leak 'devname' which gets allocated by kasprintf() a few lines > > above. > > It won't, please see pci_free_irq() in which free_irq() returns the > 'devname' passed in.
Only if request_threaded_irq() doesn't return an error. I think you should probably just have pci_irq_get_affinity() take a flags argument, or make a new function like __pci_irq_get_affinity() that pci_irq_get_affinity() can call with a default flag.
