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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 <stern@rowland.harvard.edu>
CC: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
This commit is contained in:
Alan Stern 2013-07-12 11:06:21 -04:00 committed by Felipe Balbi
parent 91f6b84739
commit 908b961326
1 changed files with 6 additions and 0 deletions
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6
drivers/usb/gadget/udc-core.c
View File

@ -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;