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From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Bjorn Helgaas <bhelgaas@google.com>,
	Sasha Levin <sashal@kernel.org>,
	linuxppc-dev@lists.ozlabs.org,
	Dongdong Liu <liudongdong3@huawei.com>,
	linux-pci@vger.kernel.org
Subject: [PATCH AUTOSEL 5.4 394/459] PCI/AER: Initialize aer_fifo
Date: Fri, 14 Feb 2020 11:00:44 -0500
Message-ID: <20200214160149.11681-394-sashal@kernel.org> (raw)
In-Reply-To: <20200214160149.11681-1-sashal@kernel.org>

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 b45bc47d04fe4..271aecfbc3bf3 100644
--- a/drivers/pci/pcie/aer.c
+++ b/drivers/pci/pcie/aer.c
@@ -1387,6 +1387,7 @@ 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


  parent reply index

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <20200214160149.11681-1-sashal@kernel.org>
2020-02-14 15:54 ` [PATCH AUTOSEL 5.4 009/459] soc: fsl: qe: change return type of cpm_muram_alloc() to s32 Sasha Levin
2020-02-14 15:54 ` [PATCH AUTOSEL 5.4 042/459] powerpc/powernv/iov: Ensure the pdn for VFs always contains a valid PE number Sasha Levin
2020-02-14 15:55 ` [PATCH AUTOSEL 5.4 083/459] powerpc/powernv/ioda: Fix ref count for devices with their own PE Sasha Levin
2020-02-14 15:55 ` [PATCH AUTOSEL 5.4 084/459] powerpc/iov: Move VF pdev fixup into pcibios_fixup_iov() Sasha Levin
2020-02-14 15:55 ` [PATCH AUTOSEL 5.4 088/459] powerpc/papr_scm: Fix leaking 'bus_desc.provider_name' in some paths Sasha Levin
2020-02-14 15:55 ` [PATCH AUTOSEL 5.4 089/459] powerpc/pseries/vio: Fix iommu_table use-after-free refcount warning Sasha Levin
2020-02-14 15:56 ` [PATCH AUTOSEL 5.4 154/459] net/wan/fsl_ucc_hdlc: reject muram offsets above 64K Sasha Levin
2020-02-14 15:58 ` [PATCH AUTOSEL 5.4 230/459] net/wan/fsl_ucc_hdlc: remove set but not used variables 'ut_info' and 'ret' Sasha Levin
2020-02-14 15:58 ` [PATCH AUTOSEL 5.4 263/459] soc: fsl: qe: remove set but not used variable 'mm_gc' Sasha Levin
2020-02-14 15:59 ` [PATCH AUTOSEL 5.4 341/459] KVM: PPC: Remove set but not used variable 'ra', 'rs', 'rt' Sasha Levin
2020-02-14 16:00 ` [PATCH AUTOSEL 5.4 354/459] ide: remove set but not used variable 'hwif' Sasha Levin
2020-02-14 16:00 ` [PATCH AUTOSEL 5.4 381/459] powerpc/ptdump: Fix W+X verification call in mark_rodata_ro() Sasha Levin
2020-02-14 16:00 ` [PATCH AUTOSEL 5.4 382/459] powerpc/ptdump: Only enable PPC_CHECK_WX with STRICT_KERNEL_RWX Sasha Levin
2020-02-14 16:00 ` [PATCH AUTOSEL 5.4 383/459] powerpc/sriov: Remove VF eeh_dev state when disabling SR-IOV Sasha Levin
2020-02-14 16:00 ` Sasha Levin [this message]
2020-02-14 16:00 ` [PATCH AUTOSEL 5.4 400/459] powerpc/pseries/lparcfg: Fix display of Maximum Memory Sasha Levin
2020-02-14 16:00 ` [PATCH AUTOSEL 5.4 401/459] selftests/eeh: Bump EEH wait time to 60s Sasha Levin
2020-02-14 16:01 ` [PATCH AUTOSEL 5.4 416/459] powerpc/mm: Don't log user reads to 0xffffffff Sasha Levin
2020-02-14 16:01 ` [PATCH AUTOSEL 5.4 430/459] powerpc: Do not consider weak unresolved symbol relocations as bad Sasha Levin

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