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wifi: b43: fix incorrect __packed annotation

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[ Upstream commit 212457ccbd ]

clang warns about an unpacked structure inside of a packed one:

drivers/net/wireless/broadcom/b43/b43.h:654:4: error: field data within 'struct b43_iv' is less aligned than 'union (unnamed union at /home/arnd/arm-soc/drivers/net/wireless/broadcom/b43/b43.h:651:2)' and is usually due to 'struct b43_iv' being packed, which can lead to unaligned accesses [-Werror,-Wunaligned-access]

The problem here is that the anonymous union has the default alignment
from its members, apparently because the original author mixed up the
placement of the __packed attribute by placing it next to the struct
member rather than the union definition. As the struct itself is
also marked as __packed, there is no need to mark its members, so just
move the annotation to the inner type instead.

As Michael noted, the same problem is present in b43legacy, so
change both at the same time.

Acked-by: Michael Büsch <m@bues.ch>
Reported-by: kernel test robot <lkp@intel.com>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Tested-by: Larry Finger <Larry.Finger@lwfinger.net>
Link: https://lore.kernel.org/oe-kbuild-all/202305160749.ay1HAoyP-lkp@intel.com/
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20230516183442.536589-1-arnd@kernel.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Arnd Bergmann 2023-05-16 20:34:22 +02:00 committed by Greg Kroah-Hartman
parent 44a55866f2
commit 17444fc120
2 changed files with 2 additions and 2 deletions
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2
drivers/net/wireless/broadcom/b43/b43.h
View file

@ -651,7 +651,7 @@ struct b43_iv {
union {
__be16 d16;
__be32 d32;
} data __packed;
} __packed data;
} __packed;

2
drivers/net/wireless/broadcom/b43legacy/b43legacy.h
View file

@ -379,7 +379,7 @@ struct b43legacy_iv {
union {
__be16 d16;
__be32 d32;
} data __packed;
} __packed data;
} __packed;
#define B43legacy_PHYMODE(phytype) (1 << (phytype))