Re: [Xen-devel] [PATCH] qemu-xen-trad: free all the pirqs for msi/msix when driver unloads

[Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx>]

Konrad Rzeszutek Wilk writes ("[Xen-devel] [PATCH] qemu-xen-trad: free all the 
pirqs for msi/msix when driver unloads"):
> From: Zhenzhong Duan <zhenzhong.duan@xxxxxxxxxx>
> 
> Pirqs are not freed when driver unloads, then new pirqs are allocated when
> driver reloads. This could exhaust pirqs if do it in a loop.
> 
> This patch fixes the bug by freeing pirqs when ENABLE bit is cleared in
> msi/msix control reg.

I have backported this to 4.4 and 4.3.  It did not apply cleanly to
4.2 (and I have not investgated why).

Thanks,
Ian.

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