[package] fix unaligned accesses in b43/xmit.c (#5169)

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@16474 3c298f89-4303-0410-b956-a3cf2f4a3e73

diff --git a/package/mac80211/patches/541-b43_unaligned_access.pach b/package/mac80211/patches/541-b43_unaligned_access.pach
new file mode 100644 (file)
index 0000000..36e22d8
--- /dev/null
+++ b/package/mac80211/patches/541-b43_unaligned_access.pach
@@ -0,0 +1,52 @@
+From: Matthieu CASTET <castet.matthieu@free.fr>
+
+Fix possible unaligned u32 access in b43_generate_plcp_hdr().
+Unaligned data is read/write with a u32 pointer instead of using the
+packed structure. Some versions of gcc ignore the "packed" attribute, if the
+structure element is accessed through a local pointer.
+
+Signed-off-by: Matthieu CASTET <castet.matthieu@free.fr>
+Signed-off-by: Michael Buesch <mb@bu3sch.de>
+
+---
+
+Please queue this bugfix.
+
+
+diff --git a/drivers/net/wireless/b43/xmit.c b/drivers/net/wireless/b43/xmit.c
+index a63d888..55f36a7 100644
+--- a/drivers/net/wireless/b43/xmit.c
++++ b/drivers/net/wireless/b43/xmit.c
+@@ -118,7 +118,6 @@ u8 b43_plcp_get_ratecode_ofdm(const u8 bitrate)
+ void b43_generate_plcp_hdr(struct b43_plcp_hdr4 *plcp,
+                          const u16 octets, const u8 bitrate)
+ {
+-      __le32 *data = &(plcp->data);
+       __u8 *raw = plcp->raw;
+ 
+       if (b43_is_ofdm_rate(bitrate)) {
+@@ -127,7 +126,7 @@ void b43_generate_plcp_hdr(struct b43_plcp_hdr4 *plcp,
+               d = b43_plcp_get_ratecode_ofdm(bitrate);
+               B43_WARN_ON(octets & 0xF000);
+               d |= (octets << 5);
+-              *data = cpu_to_le32(d);
++              plcp->data = cpu_to_le32(d);
+       } else {
+               u32 plen;
+ 
+@@ -141,7 +140,7 @@ void b43_generate_plcp_hdr(struct b43_plcp_hdr4 *plcp,
+                               raw[1] = 0x04;
+               } else
+                       raw[1] = 0x04;
+-              *data |= cpu_to_le32(plen << 16);
++              plcp->data |= cpu_to_le32(plen << 16);
+               raw[0] = b43_plcp_get_ratecode_cck(bitrate);
+       }
+ }
+
+-- 
+Greetings, Michael.
+--
+To unsubscribe from this list: send the line "unsubscribe linux-wireless" in
+the body of a message to majordomo@vger.kernel.org
+More majordomo info at  http://vger.kernel.org/majordomo-info.html
\ No newline at end of file