From: Keith Busch Date: Thu, 24 May 2018 22:16:04 +0000 (-0600) Subject: nvme-pci: Fix AER reset handling X-Git-Tag: v4.17.12~220 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=be7d23f84a115033b965d3fce443fd918fecbb71;p=thirdparty%2Fkernel%2Fstable.git nvme-pci: Fix AER reset handling [ Upstream commit 72cd4cc28e234ed7189ee508ed65ab60c80a97c8 ] The nvme timeout handling doesn't do anything if the pci channel is offline, which is the case when recovering from PCI error event, so it was a bad idea to sync the controller reset in this state. This patch flushes the reset work in the error_resume callback instead when the channel is back to online. This keeps AER handling serialized and can recover from timeouts. Link: https://bugzilla.kernel.org/show_bug.cgi?id=199757 Fixes: cc1d5e749a2e ("nvme/pci: Sync controller reset for AER slot_reset") Reported-by: Alex Gagniuc Tested-by: Alex Gagniuc Signed-off-by: Keith Busch Signed-off-by: Christoph Hellwig Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c index 5dbb0f0c02ef1..efa2750d0ae1a 100644 --- a/drivers/nvme/host/pci.c +++ b/drivers/nvme/host/pci.c @@ -2679,19 +2679,15 @@ static pci_ers_result_t nvme_slot_reset(struct pci_dev *pdev) dev_info(dev->ctrl.device, "restart after slot reset\n"); pci_restore_state(pdev); - nvme_reset_ctrl_sync(&dev->ctrl); - - switch (dev->ctrl.state) { - case NVME_CTRL_LIVE: - case NVME_CTRL_ADMIN_ONLY: - return PCI_ERS_RESULT_RECOVERED; - default: - return PCI_ERS_RESULT_DISCONNECT; - } + nvme_reset_ctrl(&dev->ctrl); + return PCI_ERS_RESULT_RECOVERED; } static void nvme_error_resume(struct pci_dev *pdev) { + struct nvme_dev *dev = pci_get_drvdata(pdev); + + flush_work(&dev->ctrl.reset_work); pci_cleanup_aer_uncorrect_error_status(pdev); }