linux-kernel - Re: [PATCH] wifi: iwlwifi: pcie: ensure RX_QUEUE_CB

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Message-ID: <aErTa9ews06Ry8QJ@stanley.mountain>
Date: Thu, 12 Jun 2025 16:17:31 +0300
From: Dan Carpenter <dan.carpenter@...aro.org>
To: Anders Roxell <anders.roxell@...aro.org>
Cc: miriam.rachel.korenblit@...el.com, arnd@...db.de,
	linux-wireless@...r.kernel.org, linux-kernel@...r.kernel.org,
	Linux Kernel Functional Testing <lkft@...aro.org>
Subject: Re: [PATCH] wifi: iwlwifi: pcie: ensure RX_QUEUE_CB_SIZE fits
 bitfield for gcc-8|9

On Thu, Jun 12, 2025 at 03:07:19PM +0200, Anders Roxell wrote:
> GCC-8 and GCC-9 emits a hard error when the value passed to
> `u32_encode_bits()`. These versions somehow think that
> RX_QUEUE_CB_SIZE(iwl_trans_get_num_rbds(trans)) is an out of bounds
> constant.  Open code this calculation using FIELD_PREP() to avoid this
> compile error.
> 
> error: call to '__field_overflow' declared with attribute error: value
> doesn't fit into mask
> 
> Fixes: b8eee90f0ba5 ("wifi: iwlwifi: cfg: unify num_rbds config")
> Reported-by: Linux Kernel Functional Testing <lkft@...aro.org>
> Closes: https://lore.kernel.org/all/CA+G9fYssasMnOE36xLH5m7ky4fKxbzN7kX5mEE7icnuu+0hGuQ@mail.gmail.com/
> Signed-off-by: Anders Roxell <anders.roxell@...aro.org>

Reviewed-by: Dan Carpenter <dan.carpenter@...aro.org>

regards,
dan carpenter