linux-kernel - RE: [PATCH] PCI: hv: Do not wait forever on a device that has disappeared

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Date:   Fri, 25 May 2018 11:43:25 +0000
From:   Haiyang Zhang <haiyangz@...rosoft.com>
To:     Dexuan Cui <decui@...rosoft.com>,
        'Lorenzo Pieralisi' <lorenzo.pieralisi@....com>,
        'Bjorn Helgaas' <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>,
        "'vkuznets@...hat.com'" <vkuznets@...hat.com>,
        "'marcelo.cerri@...onical.com'" <marcelo.cerri@...onical.com>
Subject: RE: [PATCH] PCI: hv: Do not wait forever on a device that has
 disappeared



> -----Original Message-----
> From: Dexuan Cui
> Sent: Wednesday, May 23, 2018 5:12 PM
> To: 'Lorenzo Pieralisi' <lorenzo.pieralisi@....com>; 'Bjorn Helgaas'
> <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>
> Subject: [PATCH] PCI: hv: Do not wait forever on a device that has disappeared
> 
> 
> Before the guest finishes the device initialization, the device can be removed
> anytime by the host, and after that the host won't respond to the guest's
> request, so the guest should be prepared to handle this case.
> 
> Signed-off-by: Dexuan Cui <decui@...rosoft.com>
> Cc: Stephen Hemminger <sthemmin@...rosoft.com>
> Cc: K. Y. Srinivasan <kys@...rosoft.com>
> ---
>  drivers/pci/host/pci-hyperv.c | 46 ++++++++++++++++++++++++++++++++-------
> ----

Reviewed-by: Haiyang Zhang <haiyangz@...rosoft.com>

Thank you!