diff options
| author |   Andy Shevchenko <andriy.shevchenko@linux.intel.com> | 2019-08-20 16:15:43 +0300 |
|---|---|---|
| committer |   Vinod Koul <vkoul@kernel.org> | 2019-08-21 09:41:28 +0530 |
| commit | e7b8514e4d68bec21fc6385fa0a66797ddc34ac9 (patch) | |
| tree | bcfc2b79ae469a7a46aaa3ff62be8bdb9a4a2181 /drivers/dma | |
| parent | dmaengine: dw: platform: Use devm_platform_ioremap_resource() (diff) | |
| download | linux-dev-e7b8514e4d68bec21fc6385fa0a66797ddc34ac9.tar.xz linux-dev-e7b8514e4d68bec21fc6385fa0a66797ddc34ac9.zip | |
dmaengine: dw: platform: Switch to acpi_dma_controller_register()
There is a possibility to have registered ACPI DMA controller
while it has been gone already.
To avoid the potential crash, move to non-managed
acpi_dma_controller_register().
Fixes: 42c91ee71d6d ("dw_dmac: add ACPI support")
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20190820131546.75744-8-andriy.shevchenko@linux.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'drivers/dma')
| -rw-r--r-- | drivers/dma/dw/platform.c | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/drivers/dma/dw/platform.c b/drivers/dma/dw/platform.c index 8576439d0035..44fec1eabccd 100644 --- a/drivers/dma/dw/platform.c +++ b/drivers/dma/dw/platform.c @@ -84,13 +84,20 @@ static void dw_dma_acpi_controller_register(struct dw_dma *dw) dma_cap_set(DMA_SLAVE, info->dma_cap); info->filter_fn = dw_dma_acpi_filter; - ret = devm_acpi_dma_controller_register(dev, acpi_dma_simple_xlate, - info); + ret = acpi_dma_controller_register(dev, acpi_dma_simple_xlate, info); if (ret) dev_err(dev, "could not register acpi_dma_controller\n"); } + +static void dw_dma_acpi_controller_free(struct dw_dma *dw) +{ + struct device *dev = dw->dma.dev; + + acpi_dma_controller_free(dev); +} #else /* !CONFIG_ACPI */ static inline void dw_dma_acpi_controller_register(struct dw_dma *dw) {} +static inline void dw_dma_acpi_controller_free(struct dw_dma *dw) {} #endif /* !CONFIG_ACPI */ #ifdef CONFIG_OF @@ -249,6 +256,9 @@ static int dw_remove(struct platform_device *pdev) struct dw_dma_chip *chip = data->chip; int ret; + if (ACPI_HANDLE(&pdev->dev)) + dw_dma_acpi_controller_free(chip->dw); + if (pdev->dev.of_node) of_dma_controller_free(pdev->dev.of_node); |