fm10k/base: pack TLV overlay structures

This patch adds #pragma pack(push, 1) around some structures which are passed
via TLV messages. These structures must not be left unpacked as GCC and
other compilers are wont to do. Otherwise, we get invalid message
responses from the Switch Manager software since it sends 20 bytes and
we expect 24.

Solaris (and other OS's) are not C99 compliant, so they are not able
to use the C99 style #pragma pack() code. Wrap with C99 tag for easy
stripping.

Signed-off-by: Wang Xiao W <xiao.w.wang@intel.com>

diff --git a/drivers/net/fm10k/base/fm10k_pf.h b/drivers/net/fm10k/base/fm10k_pf.h
index 1df0a23..44bd193 100644 (file)
--- a/drivers/net/fm10k/base/fm10k_pf.h
+++ b/drivers/net/fm10k/base/fm10k_pf.h
@@ -91,6 +91,16 @@ enum fm10k_pf_tlv_attr_id_v1 {
 #define FM10K_MSG_UPDATE_PVID_PVID_SHIFT       16
 #define FM10K_MSG_UPDATE_PVID_PVID_SIZE                16
 
+/* The following data structures are overlayed specifically to TLV mailbox
+ * messages, and must not have gaps between their values. They must line up
+ * correctly to the TLV definition.
+ */
+#ifdef C99
+#pragma pack(push, 1)
+#else
+#pragma pack(1)
+#endif /* C99 */
+
 struct fm10k_mac_update {
        __le32  mac_lower;
        __le16  mac_upper;
@@ -124,6 +134,12 @@ struct fm10k_swapi_1588_clock_owner {
        __le16 enabled;
 };
 
+#ifdef C99
+#pragma pack(pop)
+#else
+#pragma pack()
+#endif /* C99 */
+
 #define FM10K_PF_MSG_LPORT_CREATE_HANDLER(func) \
        FM10K_MSG_HANDLER(FM10K_PF_MSG_ID_LPORT_CREATE, NULL, func)
 #define FM10K_PF_MSG_LPORT_DELETE_HANDLER(func) \