staging: unisys: Eliminate visor_memregion_read()

Signed-off-by: Jes Sorensen <Jes.Sorensen@redhat.com>
Signed-off-by: Benjamin Romer <benjamin.romer@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/unisys/visorbus/visorchannel.c

@@ -307,7 +307,7 @@ sig_read_header(struct visorchannel *channel, u32 queue,
 		return FALSE;
 
 	/* Read the appropriate SIGNAL_QUEUE_HEADER into local memory. */
-	err = visor_memregion_read(&channel->memregion,
+	err = visorchannel_read(channel,
 				SIG_QUEUE_OFFSET(&channel->chan_hdr, queue),
 				sig_hdr, sizeof(struct signal_queue_header));
 	if (err)
@@ -324,8 +324,7 @@ sig_read_data(struct visorchannel *channel, u32 queue,
 	int signal_data_offset = SIG_DATA_OFFSET(&channel->chan_hdr, queue,
 						 sig_hdr, slot);
 
-	err = visor_memregion_read(&channel->memregion,
-				   signal_data_offset,
+	err = visorchannel_read(channel, signal_data_offset,
 				data, sig_hdr->signal_size);
 	if (err)
 		return FALSE;

drivers/staging/unisys/visorutil/memregion.h

@@ -29,8 +29,6 @@ struct memregion {
 	void __iomem *mapped;
 };
 
-int visor_memregion_read(struct memregion *memregion,
-			 ulong offset, void *dest, ulong nbytes);
 int visor_memregion_write(struct memregion *memregion,
 			  ulong offset, void *src, ulong nbytes);
 void memregion_dump(struct memregion *memregion, char *s,

drivers/staging/unisys/visorutil/memregion_direct.c

@@ -25,18 +25,6 @@
 
 #define MYDRVNAME "memregion"
 
-int
-visor_memregion_read(struct memregion *memregion, ulong offset, void *dest,
-		     ulong nbytes)
-{
-	if (offset + nbytes > memregion->nbytes)
-		return -EIO;
-
-	memcpy_fromio(dest, memregion->mapped + offset, nbytes);
-	return 0;
-}
-EXPORT_SYMBOL_GPL(visor_memregion_read);
-
 int
 visor_memregion_write(struct memregion *memregion, ulong offset, void *src,
 		      ulong nbytes)