Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
Subject: Re: [PATCH v2 1/5] PCI: dwc: Fix dw_pcie_free_msi() if msi_irq is
 invalid
To:     Jisheng Zhang <Jisheng.Zhang@synaptics.com>,
        Jingoo Han <jingoohan1@gmail.com>,
        Gustavo Pimentel <gustavo.pimentel@synopsys.com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
        Bjorn Helgaas <bhelgaas@google.com>
CC:     "linux-pci@vger.kernel.org" <linux-pci@vger.kernel.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        "linux-arm-kernel@lists.infradead.org" 
        <linux-arm-kernel@lists.infradead.org>
References: <20190301125510.4e2ee985@xhacker.debian>
 <20190301125625.4e15d869@xhacker.debian>
From:   Gustavo Pimentel <gustavo.pimentel@synopsys.com>
Message-ID: <8a0bda6b-6879-e4ac-cfe6-171abbd72abd@synopsys.com>
Date:   Wed, 13 Mar 2019 10:05:24 +0000
User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:60.0) Gecko/20100101
 Thunderbird/60.5.0
MIME-Version: 1.0
In-Reply-To: <20190301125625.4e15d869@xhacker.debian>
Content-Type: text/plain; charset="utf-8"
Content-Language: en-US
Content-Transfer-Encoding: 7bit
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

On 01/03/2019 05:03, Jisheng Zhang wrote:
> We should check msi_irq before calling irq_set_chained_handler() and
> irq_set_handler_data().
> 
> Signed-off-by: Jisheng Zhang <Jisheng.Zhang@synaptics.com>
> ---
>  drivers/pci/controller/dwc/pcie-designware-host.c | 6 ++++--
>  1 file changed, 4 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/pci/controller/dwc/pcie-designware-host.c b/drivers/pci/controller/dwc/pcie-designware-host.c
> index 0c18ab63811f..a94d3530b694 100644
> --- a/drivers/pci/controller/dwc/pcie-designware-host.c
> +++ b/drivers/pci/controller/dwc/pcie-designware-host.c
> @@ -298,8 +298,10 @@ int dw_pcie_allocate_domains(struct pcie_port *pp)
>  
>  void dw_pcie_free_msi(struct pcie_port *pp)
>  {
> -	irq_set_chained_handler(pp->msi_irq, NULL);
> -	irq_set_handler_data(pp->msi_irq, NULL);
> +	if (pp->msi_irq) {
> +		irq_set_chained_handler(pp->msi_irq, NULL);
> +		irq_set_handler_data(pp->msi_irq, NULL);
> +	}
>  
>  	irq_domain_remove(pp->msi_domain);
>  	irq_domain_remove(pp->irq_domain);
> 

Sounds good.

Acked-by: Gustavo Pimentel <gustavo.pimentel@synopsys.com>