irda: Fix a misalign access issue. (v2)

Replace u16ho with put/get_unaligned functions

Signed-off-by: Graf Yang <graf.yang@analog.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/include/net/irda/discovery.h b/include/net/irda/discovery.h
index e4efad1f9effd473e9eea66f0a3a8c09c90ae9dd..0ce93398720d1763fd4f740ded67d47b799e6bc3 100644 (file)
--- a/include/net/irda/discovery.h
+++ b/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 */

diff --git a/net/irda/discovery.c b/net/irda/discovery.c
index bfacef8b76f44b6228e15b3025c3ea31d7d14ed4..a6f99b5a14995ff62e5620f042ca0821f3552cc3 100644 (file)
--- a/net/irda/discovery.c
+++ b/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

diff --git a/net/irda/irlmp.c b/net/irda/irlmp.c
index 1f81f8e7c61da790b969f14e84952b9b349384c6..7bf5b913828babd3daeddc4e12df3b12224ad668 100644 (file)
--- a/net/irda/irlmp.c
+++ b/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

diff --git a/net/irda/irnet/irnet_irda.c b/net/irda/irnet/irnet_irda.c
index 75497e55927d695a3eee228833c68097edeb86ae..a3ec0026cdb2703b4e034a2b93751676beb521cc 100644 (file)
--- a/net/irda/irnet/irnet_irda.c
+++ b/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");
 }