From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Return-Path: From: Sinan Kaya To: linux-pci@vger.kernel.org, sulrich@codeaurora.org, timur@codeaurora.org Subject: [PATCH 1/2] IB/hfi1: Try slot reset before secondary bus reset Date: Thu, 19 Apr 2018 15:56:23 -0400 Message-Id: <1524167784-5911-1-git-send-email-okaya@codeaurora.org> MIME-Version: 1.0 List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mike Marciniszyn , "open list:HFI1 DRIVER" , linux-arm-msm@vger.kernel.org, Dennis Dalessandro , open list , Sinan Kaya , Jason Gunthorpe , Doug Ledford , linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+bjorn=helgaas.com@lists.infradead.org List-ID: The infiniband adapter might be connected to a PCI hotplug slot. Performing secondary bus reset on a hotplug slot causes PCI link up/down interrupts. Hotplug driver removes the device from system when a link down interrupt is observed and performs re-enumeration when link up interrupt is observed. This conflicts with what this code is trying to do. Try secondary bus reset only if pci_reset_slot() fails/unsupported. Signed-off-by: Sinan Kaya --- drivers/infiniband/hw/hfi1/pcie.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/infiniband/hw/hfi1/pcie.c b/drivers/infiniband/hw/hfi1/pcie.c index 83d66e8..75f49e3 100644 --- a/drivers/infiniband/hw/hfi1/pcie.c +++ b/drivers/infiniband/hw/hfi1/pcie.c @@ -908,7 +908,8 @@ static int trigger_sbr(struct hfi1_devdata *dd) * delay after a reset is required. Per spec requirements, * the link is either working or not after that point. */ - pci_reset_bridge_secondary_bus(dev->bus->self); + if (pci_reset_slot(dev->slot)) + pci_reset_bridge_secondary_bus(dev->bus->self); return 0; } -- 2.7.4 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel