[PATCH] staging: comedi: comedi_isadma.h: make self-reliant

[Ian Abbott]

The Comedi "comedi_isadma.h" header is included by the source for the
"comedi_isadma" helper module and other modules that use it.  It does
not compile cleanly when it is the first header file included.  It uses
the `dma_addr_t` type, so include <linux/types.h> to declare it.  (Also,
that indirectly takes care of the use of `NULL`.)  It uses `struct
comedi_device *` in various function prototypes, so add an incomplete
declaration of `struct comedi_device`.

Signed-off-by: Ian Abbott <abbotti@xxxxxxxxx>
---
 drivers/staging/comedi/drivers/comedi_isadma.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/staging/comedi/drivers/comedi_isadma.h b/drivers/staging/comedi/drivers/comedi_isadma.h
index c7c524f..2fb6573 100644
--- a/drivers/staging/comedi/drivers/comedi_isadma.h
+++ b/drivers/staging/comedi/drivers/comedi_isadma.h
@@ -16,6 +16,10 @@
 #ifndef _COMEDI_ISADMA_H
 #define _COMEDI_ISADMA_H
 
+#include <linux/types.h>
+
+struct comedi_device;
+
 /*
  * These are used to avoid issues when <asm/dma.h> and the DMA_MODE_
  * defines are not available.
-- 
2.1.4

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