linux-kernel - Re: [PATCH] usb: enable pci MSI/MSIX in usb core

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Date:	Fri, 17 Feb 2012 16:46:58 +0800
From:	"Alex,Shi" <alex.shi@...el.com>
To:	Clemens Ladisch <clemens@...isch.de>
Cc:	Sarah Sharp <sarah.a.sharp@...ux.intel.com>,
	stern@...land.harvard.edu, Greg KH <gregkh@...uxfoundation.org>,
	linux-usb@...r.kernel.org, andiry.xu@....com,
	linux-kernel@...r.kernel.org, Oliver Neukum <oneukum@...e.de>,
	Takashi Iwai <tiwai@...e.de>, trenn@...e.de,
	linux-pci@...r.kernel.org, Michal Marek <MMarek@...e.com>
Subject: Re: [PATCH] usb: enable pci MSI/MSIX in usb core


> The controller driver will need to know which of the multiple MSI-X
> interrupts has been raised:
> 
> irqreturn_t (*msix_irq)(struct usb_hcd *hcd, unsigned int nr_or_index);

Actually, hcd has 2 object for msix, msix_count and msix_entries. 

Do you mean msix_count maybe smaller than we decide in hcd_setup_msix()?
Which situation will make this? 


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