linux-kernel - RE: [PATCH v3 2/6] PCI: hv: hv_eject_device

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Date:   Tue, 6 Mar 2018 18:29:29 +0000
From:   "Michael Kelley (EOSG)" <Michael.H.Kelley@...rosoft.com>
To:     Dexuan Cui <decui@...rosoft.com>,
        "bhelgaas@...gle.com" <bhelgaas@...gle.com>,
        "linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
        KY Srinivasan <kys@...rosoft.com>,
        Stephen Hemminger <sthemmin@...rosoft.com>,
        "olaf@...fle.de" <olaf@...fle.de>,
        "apw@...onical.com" <apw@...onical.com>,
        "jasowang@...hat.com" <jasowang@...hat.com>
CC:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "driverdev-devel@...uxdriverproject.org" 
        <driverdev-devel@...uxdriverproject.org>,
        Haiyang Zhang <haiyangz@...rosoft.com>,
        "vkuznets@...hat.com" <vkuznets@...hat.com>,
        "marcelo.cerri@...onical.com" <marcelo.cerri@...onical.com>,
        Jack Morgenstein <jackm@...lanox.com>,
        "stable@...r.kernel.org" <stable@...r.kernel.org>
Subject: RE: [PATCH v3 2/6] PCI: hv: hv_eject_device_work(): remove the bogus
 test

> -----Original Message-----
> From: Dexuan Cui
> Sent: Tuesday, March 6, 2018 10:22 AM
> To: bhelgaas@...gle.com; linux-pci@...r.kernel.org; KY Srinivasan <kys@...rosoft.com>;
> Stephen Hemminger <sthemmin@...rosoft.com>; olaf@...fle.de; apw@...onical.com;
> jasowang@...hat.com
> Cc: linux-kernel@...r.kernel.org; driverdev-devel@...uxdriverproject.org; Haiyang Zhang
> <haiyangz@...rosoft.com>; vkuznets@...hat.com; marcelo.cerri@...onical.com; Michael
> Kelley (EOSG) <Michael.H.Kelley@...rosoft.com>; Dexuan Cui <decui@...rosoft.com>; Jack
> Morgenstein <jackm@...lanox.com>; stable@...r.kernel.org
> Subject: [PATCH v3 2/6] PCI: hv: hv_eject_device_work(): remove the bogus test
> 
> When we're in the function, hpdev->state must be hv_pcichild_ejecting:
> see hv_pci_eject_device().
> 
> Signed-off-by: Dexuan Cui <decui@...rosoft.com>
> Cc: Vitaly Kuznetsov <vkuznets@...hat.com>
> Cc: Jack Morgenstein <jackm@...lanox.com>
> Cc: stable@...r.kernel.org
> Cc: Stephen Hemminger <sthemmin@...rosoft.com>
> Cc: K. Y. Srinivasan <kys@...rosoft.com>
> Cc: Michael Kelley (EOSG) <Michael.H.Kelley@...rosoft.com>
> ---
>  drivers/pci/host/pci-hyperv.c | 5 +----
>  1 file changed, 1 insertion(+), 4 deletions(-)
> 
> diff --git a/drivers/pci/host/pci-hyperv.c b/drivers/pci/host/pci-hyperv.c
> index 1233300f41c6..04edb24c92ee 100644
> --- a/drivers/pci/host/pci-hyperv.c
> +++ b/drivers/pci/host/pci-hyperv.c
> @@ -1796,10 +1796,7 @@ static void hv_eject_device_work(struct work_struct *work)
> 
>  	hpdev = container_of(work, struct hv_pci_dev, wrk);
> 
> -	if (hpdev->state != hv_pcichild_ejecting) {
> -		put_pcichild(hpdev, hv_pcidev_ref_pnp);
> -		return;
> -	}
> +	WARN_ON(hpdev->state != hv_pcichild_ejecting);
> 
>  	/*
>  	 * Ejection can come before or after the PCI bus has been set up, so
> --
> 2.7.4

Reviewed-by: Michael Kelley <mikelley@...rosoft.com>