i40e: fixup padding issue in get_cee_dcb_cfg_v1_resp

The struct i40e_aqc_get_cee_dcb_cfg_v1_resp was originally defined with
word boundary layout issues, which most compilers deal with by silently
adding padding, making the actual struct larger than designed.
This patch adds an extra byte in fields reserved3 and reserved4 to directly
acknowledge that padding.

Because the struct doesn't actually change in size or layout, this doesn't
constitute a change in the API.

Change-ID: I53fa4741b73fa255621232a85fba000b0e223015
Signed-off-by: Shannon Nelson <shannon.nelson@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

diff --git a/drivers/net/ethernet/intel/i40e/i40e_adminq_cmd.h b/drivers/net/ethernet/intel/i40e/i40e_adminq_cmd.h
index 95d23bfbcbf11bbb17d9f6a133d1e0ed5ff44187..b840fabe3997c4b50d5f9f4dbfd8437464066efc 100644 (file)
--- a/drivers/net/ethernet/intel/i40e/i40e_adminq_cmd.h
+++ b/drivers/net/ethernet/intel/i40e/i40e_adminq_cmd.h
@@ -2074,6 +2074,15 @@ I40E_CHECK_CMD_LENGTH(i40e_aqc_lldp_start);
 #define I40E_AQC_CEE_ISCSI_STATUS_MASK (0x7 << I40E_AQC_CEE_ISCSI_STATUS_SHIFT)
 #define I40E_AQC_CEE_FIP_STATUS_SHIFT  0x10
 #define I40E_AQC_CEE_FIP_STATUS_MASK   (0x7 << I40E_AQC_CEE_FIP_STATUS_SHIFT)
+
+/* struct i40e_aqc_get_cee_dcb_cfg_v1_resp was originally defined with
+ * word boundary layout issues, which the Linux compilers silently deal
+ * with by adding padding, making the actual struct larger than designed.
+ * However, the FW compiler for the NIC is less lenient and complains
+ * about the struct.  Hence, the struct defined here has an extra byte in
+ * fields reserved3 and reserved4 to directly acknowledge that padding,
+ * and the new length is used in the length check macro.
+ */
 struct i40e_aqc_get_cee_dcb_cfg_v1_resp {
        u8      reserved1;
        u8      oper_num_tc;
@@ -2081,9 +2090,9 @@ struct i40e_aqc_get_cee_dcb_cfg_v1_resp {
        u8      reserved2;
        u8      oper_tc_bw[8];
        u8      oper_pfc_en;
-       u8      reserved3;
+       u8      reserved3[2];
        __le16  oper_app_prio;
-       u8      reserved4;
+       u8      reserved4[2];
        __le16  tlv_status;
 };