diff options
| author | Vinod Koul <vinod.koul@intel.com> | 2016-07-02 11:55:01 +0200 |
|---|---|---|
| committer | Vinod Koul <vinod.koul@intel.com> | 2016-07-16 16:49:01 +0200 |
| commit | ea62aa80bbcc881d0805cbee9afd74e3d029e48e (patch) | |
| tree | cf718b1312b51824c0e38176a3ea230a39f65e97 /drivers/dma | |
| parent | dmaengine: fsl-edma: kill the tasklets upon exit (diff) | |
| download | linux-ea62aa80bbcc881d0805cbee9afd74e3d029e48e.tar.xz linux-ea62aa80bbcc881d0805cbee9afd74e3d029e48e.zip | |
dmaengine: imx-dma: explicitly freeup irq
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>
Diffstat (limited to 'drivers/dma')
| -rw-r--r-- | drivers/dma/imx-dma.c | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/drivers/dma/imx-dma.c b/drivers/dma/imx-dma.c index 48d85f8b95fe..9301d3d09563 100644 --- a/drivers/dma/imx-dma.c +++ b/drivers/dma/imx-dma.c @@ -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 @@ disable_dma_ipg_clk: 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) |