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[Xen-devel] [PATCH] pcifront/pciback: Fix Handling of Device Disconnect
| To: | xen-devel@xxxxxxxxxxxxxxxxxxx |
|---|---|
| Subject: | [Xen-devel] [PATCH] pcifront/pciback: Fix Handling of Device Disconnect |
| From: | Yosuke Iwamatsu <y-iwamatsu@xxxxxxxxxxxxx> |
| Date: | Wed, 16 Jul 2008 19:46:44 +0900 |
| Delivery-date: | Wed, 16 Jul 2008 03:47:09 -0700 |
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When destroying pcifront/pciback, the following message appears in
the guest linux kernel log.
WARNING: g.e. still in use!
WARNING: leaking g.e. and page still in use!
This is caused by the wrong disconnect procedure that pcifront
terminates the gnttab foreign access before pciback unmaps the ring.
This patch corrects the handling of pcifront/pciback destruction
sequence. Firstly pcifront cleans up root buses to ensure no more pci_op
is issued, then pciback unmaps the shared ring and finally devices are
discarded.
Signed-off-by: Yosuke Iwamatsu <y-iwamatsu@xxxxxxxxxxxxx>
Regards,
-----------------------
Yosuke Iwamatsu
NEC Corporation
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