On Thu, 2012-03-15 at 09:01 +0100, Julia Lawall wrote:
> From: Julia Lawall <Julia.Lawall@xxxxxxx>
>
> The device remains functional if the second request_irq fails, so the first
> one should not be freed.
>
> Signed-off-by: Julia Lawall <Julia.Lawall@xxxxxxx>
Acked-by: Guan Xuetao <gxt@xxxxxxxxxxxxxxx>
Thanks,
Guan Xuetao
>
> ---
> diff --git a/arch/unicore32/kernel/dma.c b/arch/unicore32/kernel/dma.c
> index ae441bc..6184ff2 100644
> --- a/arch/unicore32/kernel/dma.c
> +++ b/arch/unicore32/kernel/dma.c
> @@ -172,8 +172,9 @@ int __init puv3_init_dma(void)
>
> ret = request_irq(IRQ_DMAERR, dma_err_handler, 0, "DMAERR", NULL);
> if (ret) {
> + /* the device remains function if this fails, so don't free
> + the previously allocated irq */
> printk(KERN_CRIT "Can't register IRQ for DMAERR\n");
> - free_irq(IRQ_DMA, "DMA");
> return ret;
> }
>
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