4.19-stable review patch. If anyone has any objections, please let me know.
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[ Upstream commit 7c53eb5d87bc21464da4268c3c0c47457b6d9c9b ]
During refactor in commit 9e478066eae4 ("mac80211: fix MU-MIMO follow-MAC mode") a new struct 'action' was declared with packed attribute as:
struct { struct ieee80211_hdr_3addr hdr; u8 category; u8 action_code; } __packed action;
But since struct 'ieee80211_hdr_3addr' is declared with an aligned keyword as:
struct ieee80211_hdr { __le16 frame_control; __le16 duration_id; u8 addr1[ETH_ALEN]; u8 addr2[ETH_ALEN]; u8 addr3[ETH_ALEN]; __le16 seq_ctrl; u8 addr4[ETH_ALEN]; } __packed __aligned(2);
Solve the ambiguity of placing aligned structure in a packed one by adding the aligned(2) attribute to struct 'action'.
This removes the following warning (W=1):
net/mac80211/rx.c:234:2: warning: alignment 1 of 'struct <anonymous>' is less than 2 [-Wpacked-not-aligned]
Cc: Johannes Berg johannes.berg@intel.com Suggested-by: Johannes Berg johannes@sipsolutions.net Signed-off-by: Mathieu Malaterre malat@debian.org Signed-off-by: Johannes Berg johannes.berg@intel.com Signed-off-by: Sasha Levin sashal@kernel.org --- net/mac80211/rx.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c index d7a05a9944421..e946ee4f335bd 100644 --- a/net/mac80211/rx.c +++ b/net/mac80211/rx.c @@ -221,7 +221,7 @@ static void ieee80211_handle_mu_mimo_mon(struct ieee80211_sub_if_data *sdata, struct ieee80211_hdr_3addr hdr; u8 category; u8 action_code; - } __packed action; + } __packed __aligned(2) action;
if (!sdata) return;