| Message ID | 1350554618-14582-3-git-send-email-david.vrabel@citrix.com (mailing list archive) |
|---|---|
| State | New, archived |
| Delegated to: | Bjorn Helgaas |
| Headers | show |
On Thu, Oct 18, 2012 at 11:03:36AM +0100, David Vrabel wrote: > From: David Vrabel <david.vrabel@citrix.com> > > Backend drivers shouldn't transistion to CLOSED unless the frontend is > CLOSED. If a backend does transition to CLOSED too soon then the > frontend may not see the CLOSING state and will not properly shutdown. > > So, treat an unexpected backend CLOSED state the same as CLOSING. > > Signed-off-by: David Vrabel <david.vrabel@citrix.com> > Acked-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> > --- > Cc: linux-pci@vger.kernel.org > Cc: Bjorn Helgaas <bhelgaas@google.com> Bjorn, do you want me to prep a git pull with this patch or can I have your Ack to put it my tree and have it part of my git pull to Linus? Thx. > --- > drivers/pci/xen-pcifront.c | 5 ++++- > 1 files changed, 4 insertions(+), 1 deletions(-) > > diff --git a/drivers/pci/xen-pcifront.c b/drivers/pci/xen-pcifront.c > index 0aab85a..a0c7312 100644 > --- a/drivers/pci/xen-pcifront.c > +++ b/drivers/pci/xen-pcifront.c > @@ -1068,13 +1068,16 @@ static void __init_refok pcifront_backend_changed(struct xenbus_device *xdev, > case XenbusStateInitialising: > case XenbusStateInitWait: > case XenbusStateInitialised: > - case XenbusStateClosed: > break; > > case XenbusStateConnected: > pcifront_try_connect(pdev); > break; > > + case XenbusStateClosed: > + if (xdev->state == XenbusStateClosed) > + break; > + /* Missed the backend's CLOSING state -- fallthrough */ > case XenbusStateClosing: > dev_warn(&xdev->dev, "backend going away!\n"); > pcifront_try_disconnect(pdev); > -- > 1.7.2.5 -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On Fri, Oct 19, 2012 at 6:59 AM, Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> wrote: > On Thu, Oct 18, 2012 at 11:03:36AM +0100, David Vrabel wrote: >> From: David Vrabel <david.vrabel@citrix.com> >> >> Backend drivers shouldn't transistion to CLOSED unless the frontend is >> CLOSED. If a backend does transition to CLOSED too soon then the >> frontend may not see the CLOSING state and will not properly shutdown. >> >> So, treat an unexpected backend CLOSED state the same as CLOSING. >> >> Signed-off-by: David Vrabel <david.vrabel@citrix.com> >> Acked-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> >> --- >> Cc: linux-pci@vger.kernel.org >> Cc: Bjorn Helgaas <bhelgaas@google.com> > > Bjorn, do you want me to prep a git pull with this patch > or can I have your Ack to put it my tree and have it part of my > git pull to Linus? Sorry, I missed this. I can put it in my -next branch for the v3.8 merge window. Would that work for you? >> --- >> drivers/pci/xen-pcifront.c | 5 ++++- >> 1 files changed, 4 insertions(+), 1 deletions(-) >> >> diff --git a/drivers/pci/xen-pcifront.c b/drivers/pci/xen-pcifront.c >> index 0aab85a..a0c7312 100644 >> --- a/drivers/pci/xen-pcifront.c >> +++ b/drivers/pci/xen-pcifront.c >> @@ -1068,13 +1068,16 @@ static void __init_refok pcifront_backend_changed(struct xenbus_device *xdev, >> case XenbusStateInitialising: >> case XenbusStateInitWait: >> case XenbusStateInitialised: >> - case XenbusStateClosed: >> break; >> >> case XenbusStateConnected: >> pcifront_try_connect(pdev); >> break; >> >> + case XenbusStateClosed: >> + if (xdev->state == XenbusStateClosed) >> + break; >> + /* Missed the backend's CLOSING state -- fallthrough */ >> case XenbusStateClosing: >> dev_warn(&xdev->dev, "backend going away!\n"); >> pcifront_try_disconnect(pdev); >> -- >> 1.7.2.5 -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On Fri, Nov 30, 2012 at 11:41 AM, Bjorn Helgaas <bhelgaas@google.com> wrote: > On Fri, Oct 19, 2012 at 6:59 AM, Konrad Rzeszutek Wilk > <konrad.wilk@oracle.com> wrote: >> On Thu, Oct 18, 2012 at 11:03:36AM +0100, David Vrabel wrote: >>> From: David Vrabel <david.vrabel@citrix.com> >>> >>> Backend drivers shouldn't transistion to CLOSED unless the frontend is >>> CLOSED. If a backend does transition to CLOSED too soon then the >>> frontend may not see the CLOSING state and will not properly shutdown. >>> >>> So, treat an unexpected backend CLOSED state the same as CLOSING. >>> >>> Signed-off-by: David Vrabel <david.vrabel@citrix.com> >>> Acked-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> >>> --- >>> Cc: linux-pci@vger.kernel.org >>> Cc: Bjorn Helgaas <bhelgaas@google.com> >> >> Bjorn, do you want me to prep a git pull with this patch >> or can I have your Ack to put it my tree and have it part of my >> git pull to Linus? > > Sorry, I missed this. I can put it in my -next branch for the v3.8 > merge window. Would that work for you? I put this in my -next branch, so we'll at least have a chance of making a linux-next cycle before v3.7 pops. >>> --- >>> drivers/pci/xen-pcifront.c | 5 ++++- >>> 1 files changed, 4 insertions(+), 1 deletions(-) >>> >>> diff --git a/drivers/pci/xen-pcifront.c b/drivers/pci/xen-pcifront.c >>> index 0aab85a..a0c7312 100644 >>> --- a/drivers/pci/xen-pcifront.c >>> +++ b/drivers/pci/xen-pcifront.c >>> @@ -1068,13 +1068,16 @@ static void __init_refok pcifront_backend_changed(struct xenbus_device *xdev, >>> case XenbusStateInitialising: >>> case XenbusStateInitWait: >>> case XenbusStateInitialised: >>> - case XenbusStateClosed: >>> break; >>> >>> case XenbusStateConnected: >>> pcifront_try_connect(pdev); >>> break; >>> >>> + case XenbusStateClosed: >>> + if (xdev->state == XenbusStateClosed) >>> + break; >>> + /* Missed the backend's CLOSING state -- fallthrough */ >>> case XenbusStateClosing: >>> dev_warn(&xdev->dev, "backend going away!\n"); >>> pcifront_try_disconnect(pdev); >>> -- >>> 1.7.2.5 -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On Fri, Nov 30, 2012 at 02:42:14PM -0700, Bjorn Helgaas wrote: > On Fri, Nov 30, 2012 at 11:41 AM, Bjorn Helgaas <bhelgaas@google.com> wrote: > > On Fri, Oct 19, 2012 at 6:59 AM, Konrad Rzeszutek Wilk > > <konrad.wilk@oracle.com> wrote: > >> On Thu, Oct 18, 2012 at 11:03:36AM +0100, David Vrabel wrote: > >>> From: David Vrabel <david.vrabel@citrix.com> > >>> > >>> Backend drivers shouldn't transistion to CLOSED unless the frontend is > >>> CLOSED. If a backend does transition to CLOSED too soon then the > >>> frontend may not see the CLOSING state and will not properly shutdown. > >>> > >>> So, treat an unexpected backend CLOSED state the same as CLOSING. > >>> > >>> Signed-off-by: David Vrabel <david.vrabel@citrix.com> > >>> Acked-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> > >>> --- > >>> Cc: linux-pci@vger.kernel.org > >>> Cc: Bjorn Helgaas <bhelgaas@google.com> > >> > >> Bjorn, do you want me to prep a git pull with this patch > >> or can I have your Ack to put it my tree and have it part of my > >> git pull to Linus? > > > > Sorry, I missed this. I can put it in my -next branch for the v3.8 > > merge window. Would that work for you? > > I put this in my -next branch, so we'll at least have a chance of > making a linux-next cycle before v3.7 pops. Great. Thx! > > >>> --- > >>> drivers/pci/xen-pcifront.c | 5 ++++- > >>> 1 files changed, 4 insertions(+), 1 deletions(-) > >>> > >>> diff --git a/drivers/pci/xen-pcifront.c b/drivers/pci/xen-pcifront.c > >>> index 0aab85a..a0c7312 100644 > >>> --- a/drivers/pci/xen-pcifront.c > >>> +++ b/drivers/pci/xen-pcifront.c > >>> @@ -1068,13 +1068,16 @@ static void __init_refok pcifront_backend_changed(struct xenbus_device *xdev, > >>> case XenbusStateInitialising: > >>> case XenbusStateInitWait: > >>> case XenbusStateInitialised: > >>> - case XenbusStateClosed: > >>> break; > >>> > >>> case XenbusStateConnected: > >>> pcifront_try_connect(pdev); > >>> break; > >>> > >>> + case XenbusStateClosed: > >>> + if (xdev->state == XenbusStateClosed) > >>> + break; > >>> + /* Missed the backend's CLOSING state -- fallthrough */ > >>> case XenbusStateClosing: > >>> dev_warn(&xdev->dev, "backend going away!\n"); > >>> pcifront_try_disconnect(pdev); > >>> -- > >>> 1.7.2.5 -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/drivers/pci/xen-pcifront.c b/drivers/pci/xen-pcifront.c index 0aab85a..a0c7312 100644 --- a/drivers/pci/xen-pcifront.c +++ b/drivers/pci/xen-pcifront.c @@ -1068,13 +1068,16 @@ static void __init_refok pcifront_backend_changed(struct xenbus_device *xdev, case XenbusStateInitialising: case XenbusStateInitWait: case XenbusStateInitialised: - case XenbusStateClosed: break; case XenbusStateConnected: pcifront_try_connect(pdev); break; + case XenbusStateClosed: + if (xdev->state == XenbusStateClosed) + break; + /* Missed the backend's CLOSING state -- fallthrough */ case XenbusStateClosing: dev_warn(&xdev->dev, "backend going away!\n"); pcifront_try_disconnect(pdev);