wifi: iwlwifi: dbg_ini: fix structure packing

[ Upstream commit 424c82e8ad56756bb98b08268ffcf68d12d183eb ]

The iwl_fw_ini_error_dump_range structure has conflicting alignment
requirements for the inner union and the outer struct:

In file included from drivers/net/wireless/intel/iwlwifi/fw/dbg.c:9:
drivers/net/wireless/intel/iwlwifi/fw/error-dump.h:312:2: error: field  within 'struct iwl_fw_ini_error_dump_range' is less aligned than 'union iwl_fw_ini_error_dump_range::(anonymous at drivers/net/wireless/intel/iwlwifi/fw/error-dump.h:312:2)' and is usually due to 'struct iwl_fw_ini_error_dump_range' being packed, which can lead to unaligned accesses [-Werror,-Wunaligned-access]
        union {

As the original intention was apparently to make the entire structure
unaligned, mark the innermost members the same way so the union
becomes packed as well.

Fixes: 973193554cae6 ("iwlwifi: dbg_ini: dump headers cleanup")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Gregory Greenman <gregory.greenman@intel.com>
Link: https://lore.kernel.org/r/20230616090343.2454061-1-arnd@kernel.org
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/net/wireless/intel/iwlwifi/fw/error-dump.h b/drivers/net/wireless/intel/iwlwifi/fw/error-dump.h
index c62576e442bdf684d7b7311b308a67e7421c1024..2d481849a9c23227030ae5ee39cacde216539ea2 100644 (file)
--- a/drivers/net/wireless/intel/iwlwifi/fw/error-dump.h
+++ b/drivers/net/wireless/intel/iwlwifi/fw/error-dump.h
@@ -295,9 +295,9 @@ struct iwl_fw_ini_fifo_hdr {
 struct iwl_fw_ini_error_dump_range {
        __le32 range_data_size;
        union {
-               __le32 internal_base_addr;
-               __le64 dram_base_addr;
-               __le32 page_num;
+               __le32 internal_base_addr __packed;
+               __le64 dram_base_addr __packed;
+               __le32 page_num __packed;
                struct iwl_fw_ini_fifo_hdr fifo_hdr;
                struct iwl_cmd_header fw_pkt_hdr;
        };