From: Michael Kelley <mikelley@microsoft.com>
To: Dexuan Cui <decui@microsoft.com>,
"lorenzo.pieralisi@arm.com" <lorenzo.pieralisi@arm.com>,
"bhelgaas@google.com" <bhelgaas@google.com>,
"linux-pci@vger.kernel.org" <linux-pci@vger.kernel.org>,
KY Srinivasan <kys@microsoft.com>,
Stephen Hemminger <sthemmin@microsoft.com>,
Sasha Levin <Alexander.Levin@microsoft.com>
Cc: "linux-hyperv@vger.kernel.org" <linux-hyperv@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"driverdev-devel@linuxdriverproject.org"
<driverdev-devel@linuxdriverproject.org>,
Haiyang Zhang <haiyangz@microsoft.com>,
"olaf@aepfle.de" <olaf@aepfle.de>,
"apw@canonical.com" <apw@canonical.com>,
"jasowang@redhat.com" <jasowang@redhat.com>,
vkuznets <vkuznets@redhat.com>,
"marcelo.cerri@canonical.com" <marcelo.cerri@canonical.com>,
"jackm@mellanox.com" <jackm@mellanox.com>,
"stable@vger.kernel.org" <stable@vger.kernel.org>
Subject: RE: [PATCH 2/3] PCI: hv: Add hv_pci_remove_slots() when we unload the driver
Date: Wed, 20 Mar 2019 21:38:55 +0000 [thread overview]
Message-ID: <DM5PR2101MB09184F9359B300EEF04C5728D7410@DM5PR2101MB0918.namprd21.prod.outlook.com> (raw)
In-Reply-To: <20190304213357.16652-3-decui@microsoft.com>
From: Dexuan Cui <decui@microsoft.com> Sent: Monday, March 4, 2019 1:35 PM
>
> When we unload pci-hyperv, the host doesn't send us a PCI_EJECT message.
> In this case we also need to make sure the sysfs pci slot directory
> is removed, otherwise "cat /sys/bus/pci/slots/2/address" will trigger
> "BUG: unable to handle kernel paging request" (I noticed the issue when
> systemd-dev crashed for me when I unloaded the driver). And, if we
> unload/reload the driver several times, we'll have multiple pci slot
> directories in /sys/bus/pci/slots/ like this:
>
> root@localhost:~# ls -rtl /sys/bus/pci/slots/
> total 0
> drwxr-xr-x 2 root root 0 Feb 7 10:49 2
> drwxr-xr-x 2 root root 0 Feb 7 10:49 2-1
> drwxr-xr-x 2 root root 0 Feb 7 10:51 2-2
>
> The patch adds the missing code.
>
> Fixes: a15f2c08c708 ("PCI: hv: support reporting serial number as slot information")
> Signed-off-by: Dexuan Cui <decui@microsoft.com>
> Acked-by: Stephen Hemminger <sthemmin@microsoft.com>
> Cc: stable@vger.kernel.org
Reviewed-by: Michael Kelley <mikelley@microsoft.com>
next prev parent reply other threads:[~2019-03-20 21:39 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-03-04 21:34 [PATCH 0/3] pci-hyperv: fix memory leak and add pci_destroy_slot() Dexuan Cui
2019-03-04 21:34 ` [PATCH 1/3] PCI: hv: Fix a memory leak in hv_eject_device_work() Dexuan Cui
2019-03-20 21:37 ` Michael Kelley
2019-03-21 0:12 ` Dexuan Cui
2019-03-26 17:08 ` Lorenzo Pieralisi
2019-03-26 17:47 ` Michael Kelley
2019-03-26 18:01 ` Dexuan Cui
2019-03-26 18:12 ` Lorenzo Pieralisi
2019-03-04 21:34 ` [PATCH 2/3] PCI: hv: Add hv_pci_remove_slots() when we unload the driver Dexuan Cui
2019-03-20 21:38 ` Michael Kelley [this message]
2019-03-04 21:34 ` [PATCH 3/3] PCI: hv: Add pci_destroy_slot() in pci_devices_present_work(), if necessary Dexuan Cui
2019-03-20 21:44 ` Michael Kelley
2019-03-21 0:35 ` Dexuan Cui
2019-03-21 0:42 ` Dexuan Cui
2019-03-26 17:50 ` Michael Kelley
2019-03-26 19:54 ` Lorenzo Pieralisi
2019-03-27 0:22 ` Dexuan Cui
2019-03-05 18:27 ` [PATCH 0/3] pci-hyperv: fix memory leak and add pci_destroy_slot() Stephen Hemminger
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