On Tue, Oct 22, 2019 at 06:00:06PM -0500, Bjorn Helgaas wrote:
> On Mon, Aug 12, 2019 at 05:31:33PM +0300, Mika Westerberg wrote:
> > If there are more than one PCIe switch with hotplug downstream ports
> > hot-removing them leads to a following deadlock:
> >
> > INFO: task irq/126-pciehp:198 blo
On Mon, Aug 12, 2019 at 05:31:33PM +0300, Mika Westerberg wrote:
> If there are more than one PCIe switch with hotplug downstream ports
> hot-removing them leads to a following deadlock:
>
> INFO: task irq/126-pciehp:198 blocked for more than 120 seconds.
> "echo 0 > /proc/sys/kernel/hung_task_t
Hi Mika,
> On Sep 23, 2019, at 16:28, Mika Westerberg
> wrote:
>
> On Mon, Sep 23, 2019 at 11:12:42AM +0300, Mika Westerberg wrote:
>> Regarding suggestion of unbinding PCI drivers without
>> pci_lock_rescan_remove() hold, I haven't looked it too closely but I
>> think we need to take that lock
On Mon, Sep 23, 2019 at 11:12:42AM +0300, Mika Westerberg wrote:
> Regarding suggestion of unbinding PCI drivers without
> pci_lock_rescan_remove() hold, I haven't looked it too closely but I
> think we need to take that lock anyway because when we are unbinding a
> hotplug driver it is supposed to
On Mon, Sep 23, 2019 at 11:12:37AM +0300, Mika Westerberg wrote:
> Regarding suggestion of unbinding PCI drivers without
> pci_lock_rescan_remove() hold, I haven't looked it too closely but I
> think we need to take that lock anyway because when we are unbinding a
> hotplug driver it is supposed to
Hi Lukas,
On Mon, Sep 23, 2019 at 07:34:03AM +0200, Lukas Wunner wrote:
> On Mon, Aug 12, 2019 at 05:31:33PM +0300, Mika Westerberg wrote:
> > If there are more than one PCIe switch with hotplug downstream ports
> > hot-removing them leads to a following deadlock:
>
> For the record, I think my c
On Mon, Aug 12, 2019 at 05:31:33PM +0300, Mika Westerberg wrote:
> If there are more than one PCIe switch with hotplug downstream ports
> hot-removing them leads to a following deadlock:
For the record, I think my comments on v1 of this patch still apply:
https://patchwork.ozlabs.org/patch/111787
On 8/19/2019 4:56 AM, Mika Westerberg wrote:
>> There are PCI controllers that won't report presence detect correctly,
>> but still report link active.
> If that's the case then pciehp_card_present() returns false so we call
> pciehp_check_link_active() which should work with those controllers.
>
On Sun, Aug 18, 2019 at 10:28:13PM -0400, Sinan Kaya wrote:
> On 8/12/2019 10:31 AM, Mika Westerberg wrote:
> > +int pciehp_card_present_or_link_active(struct controller *ctrl)
> > {
> > - return pciehp_card_present(ctrl) || pciehp_check_link_active(ctrl);
> > + int ret;
> > +
> > + ret = pc
On 8/12/2019 10:31 AM, Mika Westerberg wrote:
> +int pciehp_card_present_or_link_active(struct controller *ctrl)
> {
> - return pciehp_card_present(ctrl) || pciehp_check_link_active(ctrl);
> + int ret;
> +
> + ret = pciehp_card_present(ctrl);
> + if (ret)
> + return ret
If there are more than one PCIe switch with hotplug downstream ports
hot-removing them leads to a following deadlock:
INFO: task irq/126-pciehp:198 blocked for more than 120 seconds.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
irq/126-pciehp D0 198 2 0x
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