[PATCH v3] fsl_ucc_hdlc: process the result of hold_open()

[Christophe Leroy]

Le 28/08/2023 à 14:12, Alexandra Diupina a écrit :
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> 
> 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 <adiupina at astralinux.ru>

Reviewed-by: Christophe Leroy <christophe.leroy at csgroup.eu>

> ---
> v3: Fix the commits tree
> v2: Remove the 'rc' variable (stores the return value of the
> hdlc_open()) as Christophe Leroy <christophe.leroy at 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);
>          }
> 
>          return 0;
> --
> 2.30.2
>