Messages in this thread | ![/](/images/icornerl.gif) | | Date | Wed, 15 Jan 2003 20:47:38 +0100 | Subject | Re: [PATCH] Re: [BUG] cardbus/hotplugging still broken in 2.5.56 | From | Jens Taprogge <> |
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You are not freeing the possibly already allocated resources in case of a failure of either pci_assign_resource() or pca_enable_device(). In fact you are not even checking if pci_assign_resource() fails. That seems wrong to me.
Btw.: who is in charge of this file? Dave Jones? Is someone working on integrating it with PCI Hotplug?
Best Regards Jens
On Wed, Jan 15, 2003 at 06:26:36PM +0200, Yaacov Akiba Slama wrote: > Can you test the enclosed patch. It seems to be both simple and to > resolve the resource collisions and the "No IRQ known" problem. > I added a smal comment (and modified another) so future janitors won't > move pci_enable above pci_assign_resource again. > If everyone is ok, I can send it to Linus for inclusion in BK (I have > the green light of Dave Jones). > > Thanks, > Yaacov Akiba Slama > > Mikael Pettersson wrote: > > >Jens Taprogge writes: > >> The cardbus problems are caused by > >> > >> ChangeSet@1.797.145.6 2002-11-25 18:31:10-08:00 davej@codemonkey.org.uk > >> > >> as far as I can tell. > >> > >> pci_enable_device() will fail at least on i386 (see > >> arch/i386/pci/i386.c: pcibios_enable_resource (line 260)) if the > >> resources have not been assigned previously. Hence the ostensible > >> resource collisions. > >> > >> The attached patch should fix the problem. > >> > >> I have send the patch to Dave Jones some time ago but did not hear from > >> him yet. > >> > >> I am not subscribed to the list so please cc me on replys. > > > >Thanks. Your patch fixed the cardbus hotplug issue perfectly on my laptop. > >It survives multiple insert/eject cycles without any problems. > > > >The patch posted by Yaacov Akiba Slama today also fixed cardbus hotplug > >for me, but with his patch the kernel still prints "PCI: No IRQ known for > >interrupt pin A of device xx:xx.x. Please try using pci=biosirq" when the > >cardbus NIC is inserted; Jens Taprogge's patch silenced that warning. > > > >/Mikael > > > > > >
> --- drivers/pcmcia/cardbus.c.original 2003-01-14 19:38:49.000000000 +0200 > +++ drivers/pcmcia/cardbus.c 2003-01-15 18:21:40.000000000 +0200 > @@ -285,25 +285,29 @@ > dev->dev.dma_mask = &dev->dma_mask; > > pci_setup_device(dev); > - if (pci_enable_device(dev)) > - continue; > > strcpy(dev->dev.bus_id, dev->slot_name); > > - /* FIXME: Do we need to enable the expansion ROM? */ > + /* We need to assign resources for expansion ROM. */ > for (r = 0; r < 7; r++) { > struct resource *res = dev->resource + r; > - if (res->flags) > + if (!res->start && res->end) > pci_assign_resource(dev, r); > } > > /* Does this function have an interrupt at all? */ > pci_readb(dev, PCI_INTERRUPT_PIN, &irq_pin); > - if (irq_pin) { > + if (irq_pin) > dev->irq = irq; > - pci_writeb(dev, PCI_INTERRUPT_LINE, irq); > - } > + > + /* pci_enable_device needs to be called after pci_assign_resource */ > + /* because it returns an error if (!res->start && res->end). */ > + if (pci_enable_device(dev)) > + continue; > > + if (irq_pin) > + pci_writeb(dev, PCI_INTERRUPT_LINE, irq); > + > device_register(&dev->dev); > pci_insert_device(dev, bus); > }
-- Jens Taprogge
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