From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx0a-001b2d01.pphosted.com (mx0b-001b2d01.pphosted.com [148.163.158.5]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 406XR21KTzzF1vm for ; Fri, 23 Mar 2018 03:38:05 +1100 (AEDT) Received: from pps.filterd (m0098417.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.22/8.16.0.22) with SMTP id w2MGUGL3036643 for ; Thu, 22 Mar 2018 12:38:03 -0400 Received: from e06smtp12.uk.ibm.com (e06smtp12.uk.ibm.com [195.75.94.108]) by mx0a-001b2d01.pphosted.com with ESMTP id 2gvfhwj2my-1 (version=TLSv1.2 cipher=AES256-SHA256 bits=256 verify=NOT) for ; Thu, 22 Mar 2018 12:38:02 -0400 Received: from localhost by e06smtp12.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Thu, 22 Mar 2018 16:38:00 -0000 From: Christophe Lombard To: linuxppc-dev@lists.ozlabs.org, fbarrat@linux.vnet.ibm.com, vaibhav@linux.vnet.ibm.com, andrew.donnellan@au1.ibm.com Subject: [PATCH] cxl: disable the lazy approach for irqs in POWERVM environment. Date: Thu, 22 Mar 2018 17:37:54 +0100 Message-Id: <1521736674-13128-1-git-send-email-clombard@linux.vnet.ibm.com> List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , The cxl driver cannot disable the interrupt at the device level and has to use disable_irq[_nosync] instead. To avoid the implementation of the lazy optimisation (the interrupt is marked disabled, but the hardware is left unmasked), we can disable it, for a particular irq line, by calling 'irq_set_status_flags(irq, IRQ_DISABLE_UNLAZY)'. Signed-off-by: Christophe Lombard --- drivers/misc/cxl/guest.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/misc/cxl/guest.c b/drivers/misc/cxl/guest.c index f58b4b6c..dc476e1 100644 --- a/drivers/misc/cxl/guest.c +++ b/drivers/misc/cxl/guest.c @@ -389,6 +389,7 @@ static void disable_afu_irqs(struct cxl_context *ctx) hwirq = ctx->irqs.offset[r]; for (i = 0; i < ctx->irqs.range[r]; hwirq++, i++) { virq = irq_find_mapping(NULL, hwirq); + irq_set_status_flags(virq, IRQ_DISABLE_UNLAZY); disable_irq(virq); } } -- 2.7.4