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Blackfin arch: set_dma_callback: do not store .irq

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set_dma_callback: do not store .irq if request_irq() failed so we dont
turn around and attempt to free_irq() it later on in free_dma()

Signed-off-by: Mike Frysinger <vapier.adi@gmail.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
This commit is contained in:
Mike Frysinger 2009-01-07 23:14:39 +08:00 committed by Bryan Wu
parent 9b011407d6
commit 8f1cc23388
1 changed files with 9 additions and 11 deletions
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20
arch/blackfin/kernel/bfin_dma_5xx.c
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@ -157,18 +157,16 @@ int set_dma_callback(unsigned int channel, irq_handler_t callback, void *data)
&& channel < MAX_DMA_CHANNELS));
if (callback != NULL) {
int ret_val;
dma_ch[channel].irq = channel2irq(channel);
dma_ch[channel].data = data;
int ret;
unsigned int irq = channel2irq(channel);
ret_val =
request_irq(dma_ch[channel].irq, callback, IRQF_DISABLED,
dma_ch[channel].device_id, data);
if (ret_val) {
printk(KERN_NOTICE
"Request irq in DMA engine failed.\n");
return -EPERM;
}
ret = request_irq(irq, callback, IRQF_DISABLED,
dma_ch[channel].device_id, data);
if (ret)
return ret;
dma_ch[channel].irq = irq;
dma_ch[channel].data = data;
}
return 0;
}