提交 b52a033c 编写于 作者: M Matthieu CASTET 提交者: John W. Linville

b43: Fix possible unaligned u32 access

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: NMatthieu CASTET <castet.matthieu@free.fr>
Signed-off-by: NMichael Buesch <mb@bu3sch.de>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>
上级 5ee58d7e
......@@ -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);
}
}
......
Markdown is supported
0% .
You are about to add 0 people to the discussion. Proceed with caution.
先完成此消息的编辑!
想要评论请 注册