[Bug 214789] ehci-hcd.c ISR

[bugzilla-daemon@bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=214789

--- Comment #2 from Scott Arnold (scott.c.arnold@nasa.gov) ---
Hello,
The driver is for a Symmetricom bc635pcie Time and Frequency Processor. Driver
developed in house for ISS simulations.
Works fine on 5.3 and prior kernels.
Works fine with 5.11 if not using shared IRQ's. No interrupts with shared
IRQ's.
Machine is a HP dl580 G9 w/ 72 Intel(R) Xeon(R) CPU E7-8867 v4 @ 2.40GHz.
We only have a few of these machines the rest are G10's and work fine (not
sharing IRQ's with timing cards).
I am having the card moved to another slot to try and get a unshared IRQ.
Unfortunately MSI does not seem possible with this card.
Thanks
Scott

-----Original Message-----
From: bugzilla-daemon@bugzilla.kernel.org <bugzilla-daemon@bugzilla.kernel.org> 
Sent: Thursday, October 21, 2021 12:56 AM
To: Arnold, Scott C. (JSC-CD13)[SGT, INC] <scott.c.arnold@nasa.gov>
Subject: [EXTERNAL] [Bug 214789] ehci-hcd.c ISR

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--- Comment #1 from Greg Kroah-Hartman (greg@kroah.com) --- On Thu, Oct 21,
2021 at 04:29:42AM +0000, bugzilla-daemon@bugzilla.kernel.org
wrote:
> 
> Change in ehci_irq from spin_lock_irqsave/irqrestore to 
> spin_lock/unlock broke shared IRQ's

What shared irq broke exactly?  For what hardware platform?  And what kernel
version worked for you and now does not work?

thanks,

greg k-h

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