[PATCH v3] Bluetooth: Fix code style error

[PATCH v3] Bluetooth: Fix code style error

[Jeremy Dean]

checkpatch.pl flags the zero-length array members in struct
qca_dump_hdr:

    ERROR: Use C99 flexible arrays - see
    https://docs.kernel.org/process/deprecated.html#zero-length-and-one-element-arrays
    #3110: FILE: drivers/bluetooth/btusb.c:3110:
    + u8 data0[0];

Replace them with DECLARE_FLEX_ARRAY(), since C99 flexible array
members are not permitted inside unions or as the sole member of
a struct.

The struct layout is unchanged, and everything compiles with the
change.

Link: https://docs.kernel.org/process/deprecated.html#zero-length-and-one-element-arrays
Signed-off-by: Jeremy Dean <deaner92@yahoo.com>
---
 drivers/bluetooth/btusb.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c
index 8f7ed469cac6..b78c4a0e75fd 100644
--- a/drivers/bluetooth/btusb.c
+++ b/drivers/bluetooth/btusb.c
@@ -3103,10 +3103,10 @@ struct qca_dump_hdr {
 	__le16 seqno;
 	u8 reserved;
 	union {
-		u8 data[0];
+		DECLARE_FLEX_ARRAY(u8, data);
 		struct {
 			__le32 ram_dump_size;
-			u8 data0[0];
+			DECLARE_FLEX_ARRAY(u8, data0);
 		} __packed;
 	};
 } __packed;
-- 
2.43.0

Re: [PATCH v3] Bluetooth: Fix code style error

[Markus Elfring]

…
> ---
>  drivers/bluetooth/btusb.c | 4 ++--…

Some contributors would appreciate patch version descriptions.
https://lore.kernel.org/all/?q=%22This+looks+like+a+new+version+of+a+previously+submitted+patch%22
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/process/submitting-patches.rst?h=v7.2-rc7#n310

Regards,
Markus

Re: [PATCH v3] Bluetooth: Fix code style error

[patchwork-bot+bluetooth]

Hello:

This patch was applied to bluetooth/bluetooth-next.git (master)
by Luiz Augusto von Dentz <luiz.von.dentz@intel.com>:

On Tue, 25 Aug 2026 12:22:07 +0000 you wrote:
> checkpatch.pl flags the zero-length array members in struct
> qca_dump_hdr:
> 
>     ERROR: Use C99 flexible arrays - see
>     https://docs.kernel.org/process/deprecated.html#zero-length-and-one-element-arrays
>     #3110: FILE: drivers/bluetooth/btusb.c:3110:
>     + u8 data0[0];
> 
> [...]

Here is the summary with links:
  - [v3] Bluetooth: Fix code style error
    https://git.kernel.org/bluetooth/bluetooth-next/c/ca10117e55df

You are awesome, thank you!
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