From: Dan Carpenter <dan.carpenter@oracle.com>
To: Colin King <colin.king@canonical.com>
Cc: Christian Lamparter <chunkeey@googlemail.com>,
Kalle Valo <kvalo@codeaurora.org>,
"David S . Miller" <davem@davemloft.net>,
Jakub Kicinski <kuba@kernel.org>,
"John W . Linville" <linville@tuxdriver.com>,
linux-wireless@vger.kernel.org, netdev@vger.kernel.org,
kernel-janitors@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] carl9170: Fix error return -EAGAIN if not started
Date: Fri, 8 Oct 2021 08:58:54 +0300 [thread overview]
Message-ID: <20211008055854.GE2048@kadam> (raw)
In-Reply-To: <20211008001558.32416-1-colin.king@canonical.com>
On Fri, Oct 08, 2021 at 01:15:58AM +0100, Colin King wrote:
> From: Colin Ian King <colin.king@canonical.com>
>
> There is an error return path where the error return is being
> assigned to err rather than count and the error exit path does
> not return -EAGAIN as expected. Fix this by setting the error
> return to variable count as this is the value that is returned
> at the end of the function.
>
> Addresses-Coverity: ("Unused value")
> Fixes: 00c4da27a421 ("carl9170: firmware parser and debugfs code")
> Signed-off-by: Colin Ian King <colin.king@canonical.com>
> ---
> drivers/net/wireless/ath/carl9170/debug.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/net/wireless/ath/carl9170/debug.c b/drivers/net/wireless/ath/carl9170/debug.c
> index bb40889d7c72..f163c6bdac8f 100644
> --- a/drivers/net/wireless/ath/carl9170/debug.c
> +++ b/drivers/net/wireless/ath/carl9170/debug.c
> @@ -628,7 +628,7 @@ static ssize_t carl9170_debugfs_bug_write(struct ar9170 *ar, const char *buf,
>
> case 'R':
> if (!IS_STARTED(ar)) {
> - err = -EAGAIN;
> + count = -EAGAIN;
> goto out;
This is ugly. The bug wouldn't have happened with a direct return, it's
only the goto out which causes it. Better to replace all the error
paths with direct returns. There are two other direct returns so it's
not like a new thing...
Goto out on the success path is fine here, though.
regards,
dan carpenter
next prev parent reply other threads:[~2021-10-08 5:59 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-08 0:15 [PATCH] carl9170: Fix error return -EAGAIN if not started Colin King
2021-10-08 5:58 ` Dan Carpenter [this message]
2021-10-08 7:31 ` Colin Ian King
2021-10-08 7:43 ` Dan Carpenter
2021-10-08 15:15 ` Christian Lamparter
2021-10-10 8:05 ` Kalle Valo
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