AuxXxilium/linux_dsm_epyc7002
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dmaengine: imx-dma: explicitly freeup irq

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dmaengine device should explicitly call devm_free_irq() when using
devm_request_irq().

The irq is still ON when devices remove is executed and irq should be
quiesced before remove is completed.

Signed-off-by: Vinod Koul <vinod.koul@intel.com>
This commit is contained in:
Vinod Koul 2016-07-02 15:25:01 +05:30
parent 6f93b93b2a
commit ea62aa80bb
1 changed files with 29 additions and 0 deletions
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29
drivers/dma/imx-dma.c
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@ -167,6 +167,7 @@ struct imxdma_channel {
u32 ccr_to_device;
bool enabled_2d;
int slot_2d;
unsigned int irq;
};
enum imx_dma_type {
@ -186,6 +187,9 @@ struct imxdma_engine {
struct imx_dma_2d_config slots_2d[IMX_DMA_2D_SLOTS];
struct imxdma_channel channel[IMX_DMA_CHANNELS];
enum imx_dma_type devtype;
unsigned int irq;
unsigned int irq_err;
};
struct imxdma_filter_data {
@ -1100,6 +1104,7 @@ static int __init imxdma_probe(struct platform_device *pdev)
dev_warn(imxdma->dev, "Can't register IRQ for DMA\n");
goto disable_dma_ahb_clk;
}
imxdma->irq = irq;
irq_err = platform_get_irq(pdev, 1);
if (irq_err < 0) {
@ -1113,6 +1118,7 @@ static int __init imxdma_probe(struct platform_device *pdev)
dev_warn(imxdma->dev, "Can't register ERRIRQ for DMA\n");
goto disable_dma_ahb_clk;
}
imxdma->irq_err = irq_err;
}
/* enable DMA module */
@ -1150,6 +1156,8 @@ static int __init imxdma_probe(struct platform_device *pdev)
irq + i, i);
goto disable_dma_ahb_clk;
}
imxdmac->irq = irq + i;
init_timer(&imxdmac->watchdog);
imxdmac->watchdog.function = &imxdma_watchdog;
imxdmac->watchdog.data = (unsigned long)imxdmac;
@ -1217,10 +1225,31 @@ static int __init imxdma_probe(struct platform_device *pdev)
return ret;
}
static void imxdma_free_irq(struct platform_device *pdev, struct imxdma_engine *imxdma)
{
int i;
if (is_imx1_dma(imxdma)) {
disable_irq(imxdma->irq);
disable_irq(imxdma->irq_err);
}
for (i = 0; i < IMX_DMA_CHANNELS; i++) {
struct imxdma_channel *imxdmac = &imxdma->channel[i];
if (!is_imx1_dma(imxdma))
disable_irq(imxdmac->irq);
tasklet_kill(&imxdmac->dma_tasklet);
}
}
static int imxdma_remove(struct platform_device *pdev)
{
struct imxdma_engine *imxdma = platform_get_drvdata(pdev);
imxdma_free_irq(pdev, imxdma);
dma_async_device_unregister(&imxdma->dma_device);
if (pdev->dev.of_node)