Re: [LKP] Re: [PCI/MSI] a4fc4cf388: dmesg.genirq:Flags_mismatch_irq##(mei_me)vs.#(xhci_hcd)

From: Barry Song
Date: Sat Oct 16 2021 - 09:09:10 EST

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On Sat, Oct 16, 2021 at 3:46 AM Carel Si <beibei.si@xxxxxxxxx> wrote:
>
> Hi, Barry
>
> On Sun, Oct 03, 2021 at 04:32:28PM +0800, Barry Song wrote:
> > On Fri, Sep 3, 2021 at 7:34 AM Winkler, Tomas <tomas.winkler@xxxxxxxxx> wrote:
> > >
> > > > dmesg.genirq:Flags_mismatch_irq##(mei_me)vs.#(xhci_hcd)
> > > >
> > > > On Tue, Aug 31, 2021 at 1:21 PM Barry Song <21cnbao@xxxxxxxxx> wrote:
> > > > >
> > > > > On Mon, Aug 30, 2021 at 2:38 AM kernel test robot
> > > > <oliver.sang@xxxxxxxxx> wrote:
> > > > > >
> > > > > >
> > > > > >
> > > > > > Greeting,
> > > > > >
> > > > > > FYI, we noticed the following commit (built with gcc-9):
> > > > > >
> > > > > > commit: a4fc4cf388319ea957ffbdab5073bdd267de9082 ("[PATCH v3 3/3]
> > > > > > PCI/MSI: remove msi_attrib.default_irq in msi_desc")
> > > > > > url:
> > > > > > https://github.com/0day-ci/linux/commits/Barry-Song/PCI-MSI-Clarify-
> > > > > > the-IRQ-sysfs-ABI-for-PCI-devices/20210825-183018
> > > > > > base:
> > > > > > https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git
> > > > > > 6e764bcd1cf72a2846c0e53d3975a09b242c04c9
> > > > > >
> > > > > > in testcase: kernel-selftests
> > > > > > version: kernel-selftests-x86_64-ebaa603b-1_20210825
> > > > > > with following parameters:
> > > > > >
> > > > > > group: pidfd
> > > > > > ucode: 0xe2
> > > > > >
> > > > > > test-description: The kernel contains a set of "self tests" under the
> > > > tools/testing/selftests/ directory. These are intended to be small unit tests
> > > > to exercise individual code paths in the kernel.
> > > > > > test-url: https://www.kernel.org/doc/Documentation/kselftest.txt
> > > > > >
> > > > > >
> > > > > > on test machine: 4 threads Intel(R) Core(TM) i5-6500 CPU @ 3.20GHz
> > > > > > with 32G memory
> > > > > >
> > > > > > caused below changes (please refer to attached dmesg/kmsg for entire
> > > > log/backtrace):
> > > > > >
> > > > > >
> > > > > >
> > > > > > If you fix the issue, kindly add following tag
> > > > > > Reported-by: kernel test robot <oliver.sang@xxxxxxxxx>
> > > > > >
> > > > > >
> > > > > >
> > > > > > [ 179.602028][ T34] genirq: Flags mismatch irq 16. 00002000 (mei_me) vs.
> > > > 00000000 (xhci_hcd)
> > > > > > [ 179.614073][ T34] CPU: 2 PID: 34 Comm: kworker/u8:2 Not tainted
> > > > 5.14.0-rc7-00014-ga4fc4cf38831 #1
> > > > > > [ 179.623225][ T34] Hardware name: Dell Inc. OptiPlex 7040/0Y7WYT,
> > > > BIOS 1.8.1 12/05/2017
> > > > > > [ 179.631432][ T34] Workqueue: events_unbound async_run_entry_fn
> > > > > > [ 179.637543][ T34] Call Trace:
> > > > > > [ 179.640789][ T34] dump_stack_lvl+0x45/0x59
> > > > > > [ 179.645253][ T34] __setup_irq.cold+0x50/0xd4
> > > > > > [ 179.649893][ T34] ? mei_me_pg_exit_sync+0x480/0x480 [mei_me]
> > > > > > [ 179.655923][ T34] request_threaded_irq+0x10c/0x180
> > > > > > [ 179.661073][ T34] ? mei_me_irq_quick_handler+0x240/0x240
> > > > [mei_me]
> > > > > > [ 179.667528][ T34] mei_me_probe+0x131/0x300 [mei_me]
> > > > > > [ 179.672767][ T34] local_pci_probe+0x42/0x80
> > > > > > [ 179.677313][ T34] pci_device_probe+0x107/0x1c0
> > > > > > [ 179.682118][ T34] really_probe+0xb6/0x380
> > > > > > [ 179.687094][ T34] __driver_probe_device+0xfe/0x180
> > > > > > [ 179.692242][ T34] driver_probe_device+0x1e/0xc0
> > > > > > [ 179.697133][ T34] __driver_attach_async_helper+0x2b/0x80
> > > > > > [ 179.702802][ T34] async_run_entry_fn+0x30/0x140
> > > > > > [ 179.707693][ T34] process_one_work+0x274/0x5c0
> > > > > > [ 179.712503][ T34] worker_thread+0x50/0x3c0
> > > > > > [ 179.716959][ T34] ? process_one_work+0x5c0/0x5c0
> > > > > > [ 179.721936][ T34] kthread+0x14f/0x180
> > > > > > [ 179.725958][ T34] ? set_kthread_struct+0x40/0x40
> > > > > > [ 179.730935][ T34] ret_from_fork+0x22/0x30
> > > > > > [ 179.735699][ T34] mei_me 0000:00:16.0: request_threaded_irq failure.
> > > > irq = 16
> > > > > > [ 179.743125][ T34] mei_me 0000:00:16.0: initialization failed.
> > > > > > [ 179.749399][ T34] mei_me: probe of 0000:00:16.0 failed with error -16
> > > > > >
> > > > > >
> > > > >
> > > > > it seems there is a direct reference to pdev->irq.
> > > > > Hi Oliver, would you try if the below patch can fix the problem:
> > > >
> > > > + Tomas
> > > >
> > > > sorry. after second looking, drivers/misc/mei/pci-me.c has many places using
> > > > pdev->irq directly. We really need this driver's maintainers to address the
> > > > problem.
> > >
> > > Will look at that.
> >
> > Hi Tomas,
> >
> > I assume using hw->irq or not is a separate topic, does vim command
> > %s/pdev->irq/pci_irq_vector(pdev, 0)/g
> > as below fix the current crash problem because of directly dereferencing
> > pdev->irq?
>
> We tested your fix, it can solve "Flags_mismatch_irq##(mei_me)vs.#(xhci_hcd)"

thanks for your test and update.

> issue, but it still has "Flags_mismatch_irq##(i915)vs.#(xhci_hcd)" and

Can you post the backtrace of i915?

> "Flags_mismatch_irq##(i801_smbus)vs.#(xhci_hcd)" issue, could you help on them?

I assume the below can fix i801_smbus:

diff --git a/drivers/i2c/busses/i2c-i801.c b/drivers/i2c/busses/i2c-i801.c
index 89ae78ef1a1c..88d96e3ca268 100644
--- a/drivers/i2c/busses/i2c-i801.c
+++ b/drivers/i2c/busses/i2c-i801.c
@@ -1827,7 +1827,7 @@ static int i801_probe(struct pci_dev *dev, const
struct pci_device_id *id)
/* Default timeout in interrupt mode: 200 ms */
priv->adapter.timeout = HZ / 5;

- if (dev->irq == IRQ_NOTCONNECTED)
+ if (pci_irq_vector(dev, 0) == IRQ_NOTCONNECTED)
priv->features &= ~FEATURE_IRQ;

if (priv->features & FEATURE_IRQ) {
@@ -1849,11 +1849,11 @@ static int i801_probe(struct pci_dev *dev,
const struct pci_device_id *id)
if (priv->features & FEATURE_IRQ) {
init_completion(&priv->done);

- err = devm_request_irq(&dev->dev, dev->irq, i801_isr,
+ err = devm_request_irq(&dev->dev, pci_irq_vector(dev,
0), i801_isr,
IRQF_SHARED, DRV_NAME, priv);
if (err) {
dev_err(&dev->dev, "Failed to allocate irq %d: %d\n",
- dev->irq, err);
+ pci_irq_vector(dev, 0), err);
priv->features &= ~FEATURE_IRQ;
}
}

> thanks!
>
>
> =========================================================================================
> compiler/group/kconfig/rootfs/tbox_group/testcase/ucode:
> gcc-9/pidfd/x86_64-rhel-8.3-kselftests/debian-10.4-x86_64-20200603.cgz/lkp-skl-d05/kernel-selftests/0xe2
>
> commit:
> 86c19983f1 ("PCI/sysfs: Don't depend on pci_dev.irq for IRQ entry") <<< parent
> a4fc4cf388 ("PCI/MSI: remove msi_attrib.default_irq in msi_desc") <<< fbc
> 29368adf4c ("fixup-for-a4fc4cf388")
>
> 86c19983f1808cea a4fc4cf388319ea957ffbdab507 29368adf4c2b598c3e13dbd9603
> ---------------- --------------------------- ---------------------------
> fail:runs %reproduction fail:runs %reproduction fail:runs
> | | | | |
> :31 68% 21:31 71% 22:31 dmesg.genirq:Flags_mismatch_irq##(i801_smbus)vs.#(xhci_hcd)
> :31 84% 26:31 94% 29:31 dmesg.genirq:Flags_mismatch_irq##(i915)vs.#(xhci_hcd)
> :31 77% 24:31 0% :31 dmesg.genirq:Flags_mismatch_irq##(mei_me)vs.#(xhci_hcd)
>
> >
> > diff --git a/drivers/misc/mei/pci-me.c b/drivers/misc/mei/pci-me.c
> > index c3393b383e59..97495931fadd 100644
> > --- a/drivers/misc/mei/pci-me.c
> > +++ b/drivers/misc/mei/pci-me.c
> > @@ -216,18 +216,18 @@ static int mei_me_probe(struct pci_dev *pdev,
> > const struct pci_device_id *ent)
> >
> > pci_enable_msi(pdev);
> >
> > - hw->irq = pdev->irq;
> > + hw->irq = pci_irq_vector(pdev, 0);
> >
> > /* request and enable interrupt */
> > irqflags = pci_dev_msi_enabled(pdev) ? IRQF_ONESHOT : IRQF_SHARED;
> >
> > - err = request_threaded_irq(pdev->irq,
> > + err = request_threaded_irq(pci_irq_vector(pdev, 0),
> > mei_me_irq_quick_handler,
> > mei_me_irq_thread_handler,
> > irqflags, KBUILD_MODNAME, dev);
> > if (err) {
> > dev_err(&pdev->dev, "request_threaded_irq failure. irq = %d\n",
> > - pdev->irq);
> > + pci_irq_vector(pdev, 0));
> > goto end;
> > }
> >
> > @@ -278,7 +278,7 @@ static int mei_me_probe(struct pci_dev *pdev,
> > const struct pci_device_id *ent)
> > release_irq:
> > mei_cancel_work(dev);
> > mei_disable_interrupts(dev);
> > - free_irq(pdev->irq, dev);
> > + free_irq(pci_irq_vector(pdev, 0), dev);
> > end:
> > dev_err(&pdev->dev, "initialization failed.\n");
> > return err;
> > @@ -307,7 +307,7 @@ static void mei_me_shutdown(struct pci_dev *pdev)
> > mei_me_unset_pm_domain(dev);
> >
> > mei_disable_interrupts(dev);
> > - free_irq(pdev->irq, dev);
> > + free_irq(pci_irq_vector(pdev, 0), dev);
> > }
> >
> > /**
> > @@ -336,7 +336,7 @@ static void mei_me_remove(struct pci_dev *pdev)
> >
> > mei_disable_interrupts(dev);
> >
> > - free_irq(pdev->irq, dev);
> > + free_irq(pci_irq_vector(pdev, 0), dev);
> >
> > mei_deregister(dev);
> > }
> > @@ -356,7 +356,7 @@ static int mei_me_pci_suspend(struct device *device)
> >
> > mei_disable_interrupts(dev);
> >
> > - free_irq(pdev->irq, dev);
> > + free_irq(pci_irq_vector(pdev, 0), dev);
> > pci_disable_msi(pdev);
> >
> > return 0;
> > @@ -378,14 +378,14 @@ static int mei_me_pci_resume(struct device *device)
> > irqflags = pci_dev_msi_enabled(pdev) ? IRQF_ONESHOT : IRQF_SHARED;
> >
> > /* request and enable interrupt */
> > - err = request_threaded_irq(pdev->irq,
> > + err = request_threaded_irq(pci_irq_vector(pdev, 0),
> > mei_me_irq_quick_handler,
> > mei_me_irq_thread_handler,
> > irqflags, KBUILD_MODNAME, dev);
> >
> > if (err) {
> > dev_err(&pdev->dev, "request_threaded_irq failed: irq = %d.\n",
> > - pdev->irq);
> > + pci_irq_vector(pdev, 0));
> > return err;
> > }
> >
> >
> > Thanks
> > barry

Thanks
barry

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Next in thread: Carel Si: "Re: [LKP] Re: [PCI/MSI] a4fc4cf388: dmesg.genirq:Flags_mismatch_irq##(mei_me)vs.#(xhci_hcd)"
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