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NVMe: Need to lock queue during interrupt handling

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If we're sharing a queue between multiple CPUs and we cancel a sync I/O,
we must have the queue locked to avoid corrupting the stack of the thread
that submitted the I/O.  It turns out this is the same locking that's needed
for the threaded irq handler, so share that code.

Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
This commit is contained in:
Matthew Wilcox 2011-02-06 09:01:00 -05:00
parent 48e3d39816
commit ec6ce618d6
1 changed files with 1 additions and 6 deletions
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7
drivers/block/nvme.c
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@ -476,11 +476,6 @@ static irqreturn_t nvme_process_cq(struct nvme_queue *nvmeq)
} }
static irqreturn_t nvme_irq(int irq, void *data) static irqreturn_t nvme_irq(int irq, void *data)
{
return nvme_process_cq(data);
}
static irqreturn_t nvme_irq_thread(int irq, void *data)
{ {
irqreturn_t result; irqreturn_t result;
struct nvme_queue *nvmeq = data; struct nvme_queue *nvmeq = data;
@ -676,7 +671,7 @@ static int queue_request_irq(struct nvme_dev *dev, struct nvme_queue *nvmeq,
{ {
if (use_threaded_interrupts) if (use_threaded_interrupts)
return request_threaded_irq(dev->entry[nvmeq->cq_vector].vector, return request_threaded_irq(dev->entry[nvmeq->cq_vector].vector,
nvme_irq_check, nvme_irq_thread, nvme_irq_check, nvme_irq,
IRQF_DISABLED | IRQF_SHARED, IRQF_DISABLED | IRQF_SHARED,
name, nvmeq); name, nvmeq);
return request_irq(dev->entry[nvmeq->cq_vector].vector, nvme_irq, return request_irq(dev->entry[nvmeq->cq_vector].vector, nvme_irq,