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Groups > linux.kernel > #1420866

[PATCH v6 02/11] dmaengine: dw: provide probe(), remove() stubs for users

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Some users consider DMA optional, thus when driver is not compiled we shouldn't
prevent compilation of the users. Add stubs for dw_dma_probe() and
dw_dma_remove().

Acked-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
 include/linux/dma/dw.h | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/include/linux/dma/dw.h b/include/linux/dma/dw.h
index f2e538a..ccfd0c3 100644
--- a/include/linux/dma/dw.h
+++ b/include/linux/dma/dw.h
@@ -40,8 +40,13 @@ struct dw_dma_chip {
 };
 
 /* Export to the platform drivers */
+#if IS_ENABLED(CONFIG_DW_DMAC_CORE)
 int dw_dma_probe(struct dw_dma_chip *chip);
 int dw_dma_remove(struct dw_dma_chip *chip);
+#else
+static inline int dw_dma_probe(struct dw_dma_chip *chip) { return -ENODEV; }
+static inline int dw_dma_remove(struct dw_dma_chip *chip) { return 0; }
+#endif /* CONFIG_DW_DMAC_CORE */
 
 /* DMA API extensions */
 struct dw_desc;
-- 
2.8.1

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[PATCH v6 00/11] serial: 8250: split LPSS to 8250_lpss, enable DMA on Quark Andy Shevchenko <andriy.shevchenko@linux.intel.com> - 2016-06-13 15:50 +0200
  [PATCH v6 11/11] serial: 8250_lpss: enable DMA on Intel Quark UART Andy Shevchenko <andriy.shevchenko@linux.intel.com> - 2016-06-13 15:50 +0200
  [PATCH v6 07/11] serial: 8250: enable AFE on ports where FIFO is 16 bytes Andy Shevchenko <andriy.shevchenko@linux.intel.com> - 2016-06-13 15:50 +0200
  [PATCH v6 10/11] serial: 8250_lpss: enable MSI for Intel Quark Andy Shevchenko <andriy.shevchenko@linux.intel.com> - 2016-06-13 15:50 +0200
  [PATCH v6 06/11] serial: 8250_dma: adjust DMA address of the UART Andy Shevchenko <andriy.shevchenko@linux.intel.com> - 2016-06-13 15:50 +0200
  [PATCH v6 09/11] serial: 8250_lpss: move Quark code from PCI driver Andy Shevchenko <andriy.shevchenko@linux.intel.com> - 2016-06-13 15:50 +0200
  [PATCH v6 05/11] serial: 8250_dma: switch to new dmaengine_terminate_* API Andy Shevchenko <andriy.shevchenko@linux.intel.com> - 2016-06-13 15:50 +0200
  [PATCH v6 08/11] serial: 8250_lpss: split LPSS driver to separate module Andy Shevchenko <andriy.shevchenko@linux.intel.com> - 2016-06-13 15:50 +0200
  [PATCH v6 02/11] dmaengine: dw: provide probe(), remove() stubs for users Andy Shevchenko <andriy.shevchenko@linux.intel.com> - 2016-06-13 15:50 +0200

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