Re: [Qemu-devel] [PATCH] spapr_pci: Fix interrupt leak in rtas_ibm_change_msi() error path

[David Gibson <david@gibson.dropbear.id.au>]

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On Thu, Feb 07, 2019 at 06:28:37PM +0100, Greg Kurz wrote:
> Now that IRQ allocation has been split in two (first allocate IRQ numbers,
> then claim them), if the claiming fails, we must release the IRQs.
> 
> Fixes: 4fe75a8ccd80 "spapr: split the IRQ allocation sequence"
> Signed-off-by: Greg Kurz <groug@kaod.org>

Applied to ppc-for-4.0, thanks.

> ---
>  hw/ppc/spapr_pci.c |    6 ++++++
>  1 file changed, 6 insertions(+)
> 
> diff --git a/hw/ppc/spapr_pci.c b/hw/ppc/spapr_pci.c
> index 41d81f4a8500..6fe3c10c8d4c 100644
> --- a/hw/ppc/spapr_pci.c
> +++ b/hw/ppc/spapr_pci.c
> @@ -393,6 +393,12 @@ static void rtas_ibm_change_msi(PowerPCCPU *cpu, sPAPRMachineState *spapr,
>      for (i = 0; i < req_num; i++) {
>          spapr_irq_claim(spapr, irq + i, false, &err);
>          if (err) {
> +            if (i) {
> +                spapr_irq_free(spapr, irq, i + 1);
> +            }
> +            if (!smc->legacy_irq_allocation) {
> +                spapr_irq_msi_free(spapr, irq, req_num);
> +            }
>              error_reportf_err(err, "Can't allocate MSIs for device %x: ",
>                                config_addr);
>              rtas_st(rets, 0, RTAS_OUT_HW_ERROR);
> 

-- 
David Gibson			| I'll have my music baroque, and my code
david AT gibson.dropbear.id.au	| minimalist, thank you.  NOT _the_ _other_
				| _way_ _around_!
http://www.ozlabs.org/~dgibson

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