| From | Sasha Levin <> | Subject | [PATCH AUTOSEL 5.5 457/542] PCI/AER: Initialize aer_fifo | Date | Fri, 14 Feb 2020 10:47:29 -0500 |
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From: Dongdong Liu <liudongdong3@huawei.com>
[ Upstream commit d95f20c4f07020ebc605f3b46af4b6db9eb5fc99 ]
Previously we did not call INIT_KFIFO() for aer_fifo. This leads to kfifo_put() sometimes returning 0 (queue full) when in fact it is not.
It is easy to reproduce the problem by using aer-inject:
$ aer-inject -s :82:00.0 multiple-corr-nonfatal
The content of the multiple-corr-nonfatal file is as below:
AER COR RCVR HL 0 1 2 3 AER UNCOR POISON_TLP HL 4 5 6 7
Fixes: 27c1ce8bbed7 ("PCI/AER: Use kfifo for tracking events instead of reimplementing it") Link: https://lore.kernel.org/r/1579767991-103898-1-git-send-email-liudongdong3@huawei.com Signed-off-by: Dongdong Liu <liudongdong3@huawei.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Signed-off-by: Sasha Levin <sashal@kernel.org> --- drivers/pci/pcie/aer.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/drivers/pci/pcie/aer.c b/drivers/pci/pcie/aer.c index 1ca86f2e01665..4a818b07a1afb 100644 --- a/drivers/pci/pcie/aer.c +++ b/drivers/pci/pcie/aer.c @@ -1445,6 +1445,7 @@ static int aer_probe(struct pcie_device *dev) return -ENOMEM; rpc->rpd = port; + INIT_KFIFO(rpc->aer_fifo); set_service_data(dev, rpc); status = devm_request_threaded_irq(device, dev->irq, aer_irq, aer_isr, -- 2.20.1
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