From 908b961326b2ecfbf494c9b2f206847d925f269d Mon Sep 17 00:00:00 2001 From: Alan Stern Date: Fri, 12 Jul 2013 11:06:21 -0400 Subject: [PATCH] usb: gadget: don't fail when DMA isn't present When CONFIG_HAS_DMA isn't enabled, the UDC core gets build errors: drivers/built-in.o: In function `dma_set_coherent_mask': include/linux/dma-mapping.h:93: undefined reference to `dma_supported' include/linux/dma-mapping.h:93: undefined reference to `dma_supported' drivers/built-in.o: In function `usb_gadget_unmap_request': drivers/usb/gadget/udc-core.c:91: undefined reference to `dma_unmap_sg' drivers/usb/gadget/udc-core.c:96: undefined reference to `dma_unmap_single' drivers/built-in.o: In function `usb_gadget_map_request': drivers/usb/gadget/udc-core.c:62: undefined reference to `dma_map_sg' drivers/usb/gadget/udc-core.c:71: undefined reference to `dma_map_single' drivers/usb/gadget/udc-core.c:74: undefined reference to `dma_mapping_error' Prevent this by protecting the DMA API routines with preprocessor tests. Signed-off-by: Alan Stern CC: Geert Uytterhoeven Acked-by: Alexander Shishkin Signed-off-by: Felipe Balbi --- drivers/usb/gadget/udc-core.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/usb/gadget/udc-core.c b/drivers/usb/gadget/udc-core.c index ffd8fa541101..c28ac9872030 100644 --- a/drivers/usb/gadget/udc-core.c +++ b/drivers/usb/gadget/udc-core.c @@ -50,6 +50,8 @@ static DEFINE_MUTEX(udc_lock); /* ------------------------------------------------------------------------- */ +#ifdef CONFIG_HAS_DMA + int usb_gadget_map_request(struct usb_gadget *gadget, struct usb_request *req, int is_in) { @@ -99,6 +101,8 @@ void usb_gadget_unmap_request(struct usb_gadget *gadget, } EXPORT_SYMBOL_GPL(usb_gadget_unmap_request); +#endif /* CONFIG_HAS_DMA */ + /* ------------------------------------------------------------------------- */ void usb_gadget_set_state(struct usb_gadget *gadget, @@ -194,9 +198,11 @@ int usb_add_gadget_udc_release(struct device *parent, struct usb_gadget *gadget, dev_set_name(&gadget->dev, "gadget"); gadget->dev.parent = parent; +#ifdef CONFIG_HAS_DMA dma_set_coherent_mask(&gadget->dev, parent->coherent_dma_mask); gadget->dev.dma_parms = parent->dma_parms; gadget->dev.dma_mask = parent->dma_mask; +#endif if (release) gadget->dev.release = release; -- 2.34.1