From patchwork Mon Dec 6 22:39:54 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Gleixner X-Patchwork-Id: 12695056 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 3222FC433EF for ; Mon, 6 Dec 2021 23:09:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:Date:MIME-Version:References:Subject:Cc :To:From:Message-ID:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To: List-Owner; bh=EKXK477OuCZBkfF0Mj5Dqr9XPM+DH26TOiDenx8Hu8U=; b=cplqn7tWTTMYFZ 9rkN5vEnWgxYUj7lkFcnZTizGYQVOFSmhzB6aMi88RvCcBuQ2+3xptqv7bDZHhVRSOM69IoIm1ciT dl2JPc+Ou5GVUhXygSEA5bMRVX/FrVldB0FdNp/mWv4uuniGZCuTdtZie1ca4hMBd93V5KWqtDudO i7ANZYN8xPibNfTJ807OEyjX7wwjvnWB0U+Msiw6nZkuwI7cI7cEAXZ0Nmmvbq/q/TV6HTSmw85YQ C3AUfyd4QrdHYVcqXrQVqkx7JFbgFR7UKXlSFCFq/NZNYcd6qSWmGslPhd3XgnahFqOkvCUVousta yvlqNdx+H8QCHpfTuYKA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1muN4f-006S62-Sm; Mon, 06 Dec 2021 23:07:10 +0000 Received: from galois.linutronix.de ([193.142.43.55]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1muMeJ-006Fu8-Tc for linux-arm-kernel@lists.infradead.org; Mon, 06 Dec 2021 22:39:57 +0000 Message-ID: <20211206210439.616608151@linutronix.de> DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1638830394; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: references:references; bh=LQ/fEdCb15XlPMORiCBx0zVLCBalBxQN731AvqWpOBo=; b=3Tr/OwgWIjMrczL8k1Y7KpZrpQnBzbzk9jNn+YVhicF0q1/EBaWLJA5EQBnAdsN1D0Wulq fAFu1JfAhDg12kjnKrY2feAVfczr4B+D+aUKxqRZIoJXfcp1b/l9lDzmvNTqF83GMPtmNg O0L6lFFrGJsZpIUFf96nNzXT4R0YcnNglyNnCKK28eg5CfoXrplM1E/O55dg7JVrhTT4Ku 8OKWXgKy/6DEHxFU+DSvrITn94Q+Iw/VdTagX65qE9U6P1e6EDxwHz+zW2M2yl46BHw3XE y5F6c4xy7ygjQQk0fTm74ujfKrEoV6cO6elD5cK86MxFI4yGcgRgty/GSG5jgw== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1638830394; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: references:references; bh=LQ/fEdCb15XlPMORiCBx0zVLCBalBxQN731AvqWpOBo=; b=MVm0lNeB+aCsPEoi2uRKK0tL8KdeGC0UXyY+t/l2SKc/6bvFzzrRpVEcjpjs9glSsWZ1fc khvHgThvvOwd8zBA== From: Thomas Gleixner To: LKML Cc: Bjorn Helgaas , Marc Zygnier , Alex Williamson , Kevin Tian , Jason Gunthorpe , Megha Dey , Ashok Raj , linux-pci@vger.kernel.org, Cedric Le Goater , xen-devel@lists.xenproject.org, Juergen Gross , Greg Kroah-Hartman , Sinan Kaya , dmaengine@vger.kernel.org, Will Deacon , Santosh Shilimkar , iommu@lists.linux-foundation.org, Stuart Yoder , Laurentiu Tudor , Nishanth Menon , Tero Kristo , linux-arm-kernel@lists.infradead.org, Vinod Koul , Mark Rutland , Robin Murphy Subject: [patch V2 36/36] dmaengine: qcom_hidma: Cleanup MSI handling References: <20211206210307.625116253@linutronix.de> MIME-Version: 1.0 Date: Mon, 6 Dec 2021 23:39:54 +0100 (CET) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20211206_143956_180429_8F0C53EB X-CRM114-Status: GOOD ( 14.22 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org There is no reason to walk the MSI descriptors to retrieve the interrupt number for a device. Use msi_get_virq() instead. Signed-off-by: Thomas Gleixner Reviewed-by: Greg Kroah-Hartman Reviewed-by: Jason Gunthorpe Acked-by: Sinan Kaya Cc: dmaengine@vger.kernel.org --- drivers/dma/qcom/hidma.c | 42 ++++++++++++++++++------------------------ 1 file changed, 18 insertions(+), 24 deletions(-) --- a/drivers/dma/qcom/hidma.c +++ b/drivers/dma/qcom/hidma.c @@ -678,11 +678,13 @@ static void hidma_free_msis(struct hidma { #ifdef CONFIG_GENERIC_MSI_IRQ_DOMAIN struct device *dev = dmadev->ddev.dev; - struct msi_desc *desc; + int i, virq; - /* free allocated MSI interrupts above */ - for_each_msi_entry(desc, dev) - devm_free_irq(dev, desc->irq, &dmadev->lldev); + for (i = 0; i < HIDMA_MSI_INTS; i++) { + virq = msi_get_virq(dev, i); + if (virq) + devm_free_irq(dev, virq, &dmadev->lldev); + } platform_msi_domain_free_irqs(dev); #endif @@ -692,45 +694,37 @@ static int hidma_request_msi(struct hidm struct platform_device *pdev) { #ifdef CONFIG_GENERIC_MSI_IRQ_DOMAIN - int rc; - struct msi_desc *desc; - struct msi_desc *failed_desc = NULL; + int rc, i, virq; rc = platform_msi_domain_alloc_irqs(&pdev->dev, HIDMA_MSI_INTS, hidma_write_msi_msg); if (rc) return rc; - for_each_msi_entry(desc, &pdev->dev) { - if (!desc->msi_index) - dmadev->msi_virqbase = desc->irq; - - rc = devm_request_irq(&pdev->dev, desc->irq, + for (i = 0; i < HIDMA_MSI_INTS; i++) { + virq = msi_get_virq(&pdev->dev, i); + rc = devm_request_irq(&pdev->dev, virq, hidma_chirq_handler_msi, 0, "qcom-hidma-msi", &dmadev->lldev); - if (rc) { - failed_desc = desc; + if (rc) break; - } + if (!i) + dmadev->msi_virqbase = virq; } if (rc) { /* free allocated MSI interrupts above */ - for_each_msi_entry(desc, &pdev->dev) { - if (desc == failed_desc) - break; - devm_free_irq(&pdev->dev, desc->irq, - &dmadev->lldev); + for (--i; i >= 0; i--) { + virq = msi_get_virq(&pdev->dev, i); + devm_free_irq(&pdev->dev, virq, &dmadev->lldev); } + dev_warn(&pdev->dev, + "failed to request MSI irq, falling back to wired IRQ\n"); } else { /* Add callback to free MSIs on teardown */ hidma_ll_setup_irq(dmadev->lldev, true); - } - if (rc) - dev_warn(&pdev->dev, - "failed to request MSI irq, falling back to wired IRQ\n"); return rc; #else return -EINVAL;