From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from e28smtp09.in.ibm.com (e28smtp09.in.ibm.com [125.16.236.9]) (using TLSv1.2 with cipher CAMELLIA256-SHA (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 3qrHFm5lmfzDqh1 for ; Thu, 21 Apr 2016 21:53:32 +1000 (AEST) Received: from localhost by e28smtp09.in.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Thu, 21 Apr 2016 17:23:30 +0530 Received: from d28av01.in.ibm.com (d28av01.in.ibm.com [9.184.220.63]) by d28relay01.in.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id u3LBrPIt54460452 for ; Thu, 21 Apr 2016 17:23:25 +0530 Received: from d28av01.in.ibm.com (localhost [127.0.0.1]) by d28av01.in.ibm.com (8.14.4/8.14.4/NCO v10.0 AVout) with ESMTP id u3LHLMRM017161 for ; Thu, 21 Apr 2016 22:51:24 +0530 From: Gavin Shan To: linuxppc-dev@lists.ozlabs.org Cc: alistair@popple.id.au, david@gibson.dropbear.id.au, ruscur@russell.cc, mpe@ellerman.id.au, Gavin Shan Subject: [PATCH 1/3] powerpc/eeh: Ignore error handlers in eeh_pe_reset_and_recover() Date: Thu, 21 Apr 2016 21:53:05 +1000 Message-Id: <1461239595-5627-1-git-send-email-gwshan@linux.vnet.ibm.com> List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , The function eeh_pe_reset_and_recover() is used to recover EEH error when the passthrou device are transferred to guest and backwords, meaning the device's driver is vfio-pci or none. When the driver is vfio-pci that provides error_detected() error handler only, the handler simply stops the guest and it's not expected behaviour. On the other hand, no error handlers will be called if we don't have a bound driver. This ignores all error handlers provided by device driver in eeh_pe_reset_and_recover() to avoid the exceptional behaviour. Fixes: 5cfb20b9 ("powerpc/eeh: Emulate EEH recovery for VFIO devices") Cc: stable@vger.kernel.org #v3.18+ Signed-off-by: Gavin Shan --- arch/powerpc/kernel/eeh_driver.c | 11 +---------- 1 file changed, 1 insertion(+), 10 deletions(-) diff --git a/arch/powerpc/kernel/eeh_driver.c b/arch/powerpc/kernel/eeh_driver.c index fb6207d..1c7d703 100644 --- a/arch/powerpc/kernel/eeh_driver.c +++ b/arch/powerpc/kernel/eeh_driver.c @@ -552,7 +552,7 @@ static int eeh_clear_pe_frozen_state(struct eeh_pe *pe, int eeh_pe_reset_and_recover(struct eeh_pe *pe) { - int result, ret; + int ret; /* Bail if the PE is being recovered */ if (pe->state & EEH_PE_RECOVERING) @@ -564,9 +564,6 @@ int eeh_pe_reset_and_recover(struct eeh_pe *pe) /* Save states */ eeh_pe_dev_traverse(pe, eeh_dev_save_state, NULL); - /* Report error */ - eeh_pe_dev_traverse(pe, eeh_report_error, &result); - /* Issue reset */ ret = eeh_reset_pe(pe); if (ret) { @@ -581,15 +578,9 @@ int eeh_pe_reset_and_recover(struct eeh_pe *pe) return ret; } - /* Notify completion of reset */ - eeh_pe_dev_traverse(pe, eeh_report_reset, &result); - /* Restore device state */ eeh_pe_dev_traverse(pe, eeh_dev_restore_state, NULL); - /* Resume */ - eeh_pe_dev_traverse(pe, eeh_report_resume, NULL); - /* Clear recovery mode */ eeh_pe_state_clear(pe, EEH_PE_RECOVERING); -- 2.1.0