From: Greg KH <gregkh@linuxfoundation.org>
To: Jhih-Ming Huang <fbihjmeric@gmail.com>
Cc: fabioaiuto83@gmail.com, ross.schm.dev@gmail.com,
maqianga@uniontech.com, marcocesati@gmail.com,
linux-staging@lists.linux.dev, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] rtw_security: fix cast to restricted __le32
Date: Sun, 13 Jun 2021 12:26:59 +0200 [thread overview]
Message-ID: <YMXdc/UtkcVOlZ70@kroah.com> (raw)
In-Reply-To: <20210613102229.1424495-1-fbihjmeric@gmail.com>
On Sun, Jun 13, 2021 at 06:22:29PM +0800, Jhih-Ming Huang wrote:
> This patch fixes the sparse warning of fix cast to restricted __le32.
>
> Signed-off-by: Jhih-Ming Huang <fbihjmeric@gmail.com>
> ---
> drivers/staging/rtl8723bs/core/rtw_security.c | 5 +++--
> 1 file changed, 3 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/staging/rtl8723bs/core/rtw_security.c b/drivers/staging/rtl8723bs/core/rtw_security.c
> index a99f439328f1..2f4da67e31c6 100644
> --- a/drivers/staging/rtl8723bs/core/rtw_security.c
> +++ b/drivers/staging/rtl8723bs/core/rtw_security.c
> @@ -121,7 +121,7 @@ void rtw_wep_decrypt(struct adapter *padapter, u8 *precvframe)
> arc4_crypt(ctx, payload, payload, length);
>
> /* calculate icv and compare the icv */
> - *((u32 *)crc) = le32_to_cpu(~crc32_le(~0, payload, length - 4));
> + *((u32 *)crc) = le32_to_cpu((__force __le32)~crc32_le(~0, payload, length - 4));
When you use __force, that usually implies something is wrong here.
Look at the recent changes that were just submitted for this a week or
so ago in the mailing list archives, and the discussion about them, to
see the issues involved here.
I would need to see a _LOT_ of description in the changelog about why
these changes are actually correct, before I can take them.
thanks,
greg k-h
next prev parent reply other threads:[~2021-06-13 10:27 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-13 10:22 [PATCH] rtw_security: fix cast to restricted __le32 Jhih-Ming Huang
2021-06-13 10:26 ` Greg KH [this message]
2021-06-14 20:48 ` David Laight
2021-06-18 18:36 ` Jhih Ming Huang
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