From patchwork Thu May 17 06:03:24 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chris Wilson X-Patchwork-Id: 10405375 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 61C7E60353 for ; Thu, 17 May 2018 06:09:02 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 508802893A for ; Thu, 17 May 2018 06:09:02 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 4547328942; Thu, 17 May 2018 06:09:02 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=2.0 tests=BAYES_00, MAILING_LIST_MULTI, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 0DAD22893A for ; Thu, 17 May 2018 06:09:02 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id DEF8B6E616; Thu, 17 May 2018 06:08:49 +0000 (UTC) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from fireflyinternet.com (mail.fireflyinternet.com [109.228.58.192]) by gabe.freedesktop.org (Postfix) with ESMTPS id CCE3C6E5ED for ; Thu, 17 May 2018 06:08:34 +0000 (UTC) X-Default-Received-SPF: pass (skip=forwardok (res=PASS)) x-ip-name=78.156.65.138; Received: from haswell.alporthouse.com (unverified [78.156.65.138]) by fireflyinternet.com (Firefly Internet (M1)) with ESMTP id 11730224-1500050 for multiple; Thu, 17 May 2018 07:07:56 +0100 Received: by haswell.alporthouse.com (sSMTP sendmail emulation); Thu, 17 May 2018 07:07:55 +0100 From: Chris Wilson To: intel-gfx@lists.freedesktop.org Date: Thu, 17 May 2018 07:03:24 +0100 Message-Id: <20180517060738.19193-8-chris@chris-wilson.co.uk> X-Mailer: git-send-email 2.17.0 In-Reply-To: <20180517060738.19193-1-chris@chris-wilson.co.uk> References: <20180517060738.19193-1-chris@chris-wilson.co.uk> X-Originating-IP: 78.156.65.138 X-Country: code=GB country="United Kingdom" ip=78.156.65.138 Subject: [Intel-gfx] [PATCH 008/262] drm/i915: Allow init_breadcrumbs to be used from irq context X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" X-Virus-Scanned: ClamAV using ClamSMTP In order to support engine reset from irq (timer) context, we need to be able to re-initialise the breadcrumbs. So we need to promote the plain spin_lock_irq to a safe spin_lock_irqsave. Signed-off-by: Chris Wilson --- drivers/gpu/drm/i915/intel_breadcrumbs.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_breadcrumbs.c b/drivers/gpu/drm/i915/intel_breadcrumbs.c index 18e643df523e..86a987b8ac66 100644 --- a/drivers/gpu/drm/i915/intel_breadcrumbs.c +++ b/drivers/gpu/drm/i915/intel_breadcrumbs.c @@ -846,8 +846,9 @@ static void cancel_fake_irq(struct intel_engine_cs *engine) void intel_engine_reset_breadcrumbs(struct intel_engine_cs *engine) { struct intel_breadcrumbs *b = &engine->breadcrumbs; + unsigned long flags; - spin_lock_irq(&b->irq_lock); + spin_lock_irqsave(&b->irq_lock, flags); /* * Leave the fake_irq timer enabled (if it is running), but clear the @@ -871,7 +872,7 @@ void intel_engine_reset_breadcrumbs(struct intel_engine_cs *engine) */ clear_bit(ENGINE_IRQ_BREADCRUMB, &engine->irq_posted); - spin_unlock_irq(&b->irq_lock); + spin_unlock_irqrestore(&b->irq_lock, flags); } void intel_engine_fini_breadcrumbs(struct intel_engine_cs *engine)