From: Keith Busch <keith.busch@intel.com> mainline inclusion from mainline-v4.20-rc1 commit ecae65e133f2e0647e6364d691130ff551382d91 category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/I47H3V CVE: NA -------------------------------- commit ecae65e133f2e0647e6364d691130ff551382d91 upstream. Backport summary: for 4.19 kernel ICX PCIe Gen4 support. Use the recommended kernel API for writing to a concurrently-accessed kfifo. No functional change here. Signed-off-by: Keith Busch <keith.busch@intel.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> (cherry picked from commit ecae65e133f2e0647e6364d691130ff551382d91) Signed-off-by: Ethan Zhao <haifeng.zhao@intel.com> Signed-off-by: Jackie Liu <liuyun01@kylinos.cn> Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com> Reviewed-by: Xiongfeng Wang <wangxiongfeng2@huawei.com> Reviewed-by: Xie XiuQi <xiexiuqi@huawei.com> Signed-off-by: Yang Yingliang <yangyingliang@huawei.com> --- drivers/pci/pcie/aer.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) diff --git a/drivers/pci/pcie/aer.c b/drivers/pci/pcie/aer.c index ced4462738ed8..1072229eb9fce 100644 --- a/drivers/pci/pcie/aer.c +++ b/drivers/pci/pcie/aer.c @@ -1063,7 +1063,6 @@ static DECLARE_WORK(aer_recover_work, aer_recover_work_func); void aer_recover_queue(int domain, unsigned int bus, unsigned int devfn, int severity, struct aer_capability_regs *aer_regs) { - unsigned long flags; struct aer_recover_entry entry = { .bus = bus, .devfn = devfn, @@ -1072,13 +1071,12 @@ void aer_recover_queue(int domain, unsigned int bus, unsigned int devfn, .regs = aer_regs, }; - spin_lock_irqsave(&aer_recover_ring_lock, flags); - if (kfifo_put(&aer_recover_ring, entry)) + if (kfifo_in_spinlocked(&aer_recover_ring, &entry, sizeof(entry), + &aer_recover_ring_lock)) schedule_work(&aer_recover_work); else pr_err("AER recover: Buffer overflow when recovering AER for %04x:%02x:%02x:%x\n", domain, bus, PCI_SLOT(devfn), PCI_FUNC(devfn)); - spin_unlock_irqrestore(&aer_recover_ring_lock, flags); } EXPORT_SYMBOL_GPL(aer_recover_queue); #endif -- 2.25.1