From mboxrd@z Thu Jan  1 00:00:00 1970
From: Ian Jackson <Ian.Jackson@eu.citrix.com>
Subject: Re: [PATCH] qemu-xen-trad: free all the pirqs for
	msi/msix	when driver unloads
Date: Wed, 2 Jul 2014 16:06:46 +0100
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To: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: xen-devel@lists.xenproject.org, zhenzhong.duan@oracle.com, stefano.stabellini@eu.citrix.com
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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@oracle.com>
> 
> 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.