irda: Fix a misalign access issue. (v2)

Replace u16ho with put/get_unaligned functions
Signed-off-by: NGraf Yang <graf.yang@analog.com>
Signed-off-by: NBryan Wu <cooloney@kernel.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

include/net/irda/discovery.h

@@ -57,9 +57,6 @@ typedef union {
 	__u8  byte[2];
 } __u16_host_order;
 
-/* Same purpose, different application */
-#define u16ho(array) (* ((__u16 *) array))
-
 /* Types of discovery */
 typedef enum {
 	DISCOVERY_LOG,		/* What's in our discovery log */

net/irda/discovery.c

@@ -40,6 +40,8 @@
 
 #include <net/irda/discovery.h>
 
+#include <asm/unaligned.h>
+
 /*
  * Function irlmp_add_discovery (cachelog, discovery)
  *
@@ -87,7 +89,7 @@ void irlmp_add_discovery(hashbin_t *cachelog, discovery_t *new)
 			 */
 			hashbin_remove_this(cachelog, (irda_queue_t *) node);
 			/* Check if hints bits are unchanged */
-			if(u16ho(node->data.hints) == u16ho(new->data.hints))
+			if (get_unaligned((__u16 *)node->data.hints) == get_unaligned((__u16 *)new->data.hints))
 				/* Set time of first discovery for this node */
 				new->firststamp = node->firststamp;
 			kfree(node);
@@ -281,9 +283,9 @@ struct irda_device_info *irlmp_copy_discoveries(hashbin_t *log, int *pn,
 		/* Mask out the ones we don't want :
 		 * We want to match the discovery mask, and to get only
 		 * the most recent one (unless we want old ones) */
-		if ((u16ho(discovery->data.hints) & mask) &&
+		if ((get_unaligned((__u16 *)discovery->data.hints) & mask) &&
 		    ((old_entries) ||
-		     ((jiffies - discovery->firststamp) < j_timeout)) ) {
+		     ((jiffies - discovery->firststamp) < j_timeout))) {
 			/* Create buffer as needed.
 			 * As this function get called a lot and most time
 			 * we don't have anything to put in the log (we are

net/irda/irlmp.c

@@ -1062,7 +1062,8 @@ void irlmp_discovery_expiry(discinfo_t *expiries, int number)
 		for(i = 0; i < number; i++) {
 			/* Check if we should notify client */
 			if ((client->expir_callback) &&
-			    (client->hint_mask.word & u16ho(expiries[i].hints)
+			    (client->hint_mask.word &
+			     get_unaligned((__u16 *)expiries[i].hints)
 			     & 0x7f7f) )
 				client->expir_callback(&(expiries[i]),
 						       EXPIRY_TIMEOUT,
@@ -1086,7 +1087,7 @@ discovery_t *irlmp_get_discovery_response(void)
 
 	IRDA_ASSERT(irlmp != NULL, return NULL;);
 
-	u16ho(irlmp->discovery_rsp.data.hints) = irlmp->hints.word;
+	put_unaligned(irlmp->hints.word, (__u16 *)irlmp->discovery_rsp.data.hints);
 
 	/*
 	 *  Set character set for device name (we use ASCII), and

net/irda/irnet/irnet_irda.c

@@ -1673,7 +1673,7 @@ irnet_discovery_indication(discinfo_t *		discovery,
   /* Notify the control channel */
   irnet_post_event(NULL, IRNET_DISCOVER,
 		   discovery->saddr, discovery->daddr, discovery->info,
-		   u16ho(discovery->hints));
+		   get_unaligned((__u16 *)discovery->hints));
 
   DEXIT(IRDA_OCB_TRACE, "\n");
 }
@@ -1704,7 +1704,7 @@ irnet_expiry_indication(discinfo_t *	expiry,
   /* Notify the control channel */
   irnet_post_event(NULL, IRNET_EXPIRE,
 		   expiry->saddr, expiry->daddr, expiry->info,
-		   u16ho(expiry->hints));
+		   get_unaligned((__u16 *)expiry->hints));
 
   DEXIT(IRDA_OCB_TRACE, "\n");
 }