On Mon, 28 Aug 2023 15:12:35 +0300 Alexandra Diupina wrote:
> Process the result of hold_open() and return it from
> uhdlc_open() in case of an error
> It is necessary to pass the error code up the control flow,
> similar to a possible error in request_irq()
>
> Found by Linux Verification Center (linuxtesting.org) with SVACE.
>
> Fixes: c19b6d246a35 ("drivers/net: support hdlc function for QE-UCC")
> Signed-off-by: Alexandra Diupina <adiup...@astralinux.ru>
> ---
> v3: Fix the commits tree
> v2: Remove the 'rc' variable (stores the return value of the
> hdlc_open()) as Christophe Leroy <christophe.le...@csgroup.eu> suggested
> drivers/net/wan/fsl_ucc_hdlc.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/net/wan/fsl_ucc_hdlc.c b/drivers/net/wan/fsl_ucc_hdlc.c
> index 47c2ad7a3e42..4164abea7725 100644
> --- a/drivers/net/wan/fsl_ucc_hdlc.c
> +++ b/drivers/net/wan/fsl_ucc_hdlc.c
> @@ -731,7 +731,7 @@ static int uhdlc_open(struct net_device *dev)
> napi_enable(&priv->napi);
> netdev_reset_queue(dev);
> netif_start_queue(dev);
> - hdlc_open(dev);
> + return hdlc_open(dev);
Don't you have to undo all the things done prior to hdlc_open()?
Before you post v4 please make sure that you've read:
https://www.kernel.org/doc/html/next/process/maintainer-netdev.html#resending-after-review
Zhao, please review the next version.
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pw-bot: cr
