Re: [PATCH] usb: hcd: Revert 306c54d0edb6ba94d39877524dddebaad7770cf2: Try MSI interrupts on PCI devices

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On Tue, 2021-07-13 at 23:33 +0300, Andy Shevchenko wrote:
> On Tue, Jul 13, 2021 at 02:50:42PM -0400, Laurence Oberman wrote:
> > Customers have been reporting that the I/O is radically being
> > slowed down to HPE virtual USB ILO served DVD images during
> > installation.
> 
> Side note:
> 
> Simple changing
> 
> -		retval = pci_alloc_irq_vectors(dev, 1, 1,
> PCI_IRQ_LEGACY | PCI_IRQ_MSI);
> +		retval = pci_alloc_irq_vectors(dev, 1, 1,
> PCI_IRQ_LEGACY);
> 
> should have the same effect without touching tons of a good code.
> 

Andy and Alan,
I tested this and as expected it worked as well.
However David has given me a possible ehci fix which would be the best
outcome you wanted, I am testing that now and will follow up tomorrow.

Regards
Laurence




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