netdev - RE: [PATCH v2 1/3][can-next] can: rcar_can: Fix erroneous registration

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Date:   Thu, 8 Nov 2018 12:39:00 +0000
From:   Fabrizio Castro <fabrizio.castro@...renesas.com>
To:     Fabrizio Castro <fabrizio.castro@...renesas.com>,
        Wolfgang Grandegger <wg@...ndegger.com>,
        Marc Kleine-Budde <mkl@...gutronix.de>
CC:     "David S. Miller" <davem@...emloft.net>,
        Sergei Shtylyov <sergei.shtylyov@...entembedded.com>,
        Chris Paterson <Chris.Paterson2@...esas.com>,
        "linux-can@...r.kernel.org" <linux-can@...r.kernel.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        Simon Horman <horms@...ge.net.au>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Biju Das <biju.das@...renesas.com>,
        "linux-renesas-soc@...r.kernel.org" 
        <linux-renesas-soc@...r.kernel.org>
Subject: RE: [PATCH v2 1/3][can-next] can: rcar_can: Fix erroneous
 registration

Dear All,

Is this patch ok?

Thanks,
Fab

> From: Fabrizio Castro <fabrizio.castro@...renesas.com>
> Sent: 10 September 2018 11:43
> Subject: [PATCH v2 1/3][can-next] can: rcar_can: Fix erroneous registration
>
> Assigning 2 to "renesas,can-clock-select" tricks the driver into
> registering the CAN interface, even though we don't want that.
> This patch improves one of the checks to prevent that from happening.
>
> Fixes: 862e2b6af9413b43 ("can: rcar_can: support all input clocks")
> Signed-off-by: Fabrizio Castro <fabrizio.castro@...renesas.com>
> Signed-off-by: Chris Paterson <Chris.Paterson2@...esas.com>
> ---
>
> v1->v2:
> * dropped id specific data as per Geert's comments
>
> This patch applies on top of linux-can-next-for-4.19-20180727.
>
>  drivers/net/can/rcar/rcar_can.c | 5 ++++-
>  1 file changed, 4 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/net/can/rcar/rcar_can.c b/drivers/net/can/rcar/rcar_can.c
> index 11662f4..771a460 100644
> --- a/drivers/net/can/rcar/rcar_can.c
> +++ b/drivers/net/can/rcar/rcar_can.c
> @@ -24,6 +24,9 @@
>
>  #define RCAR_CAN_DRV_NAME"rcar_can"
>
> +#define RCAR_SUPPORTED_CLOCKS(BIT(CLKR_CLKP1) | BIT(CLKR_CLKP2) | \
> + BIT(CLKR_CLKEXT))
> +
>  /* Mailbox configuration:
>   * mailbox 60 - 63 - Rx FIFO mailboxes
>   * mailbox 56 - 59 - Tx FIFO mailboxes
> @@ -789,7 +792,7 @@ static int rcar_can_probe(struct platform_device *pdev)
>  goto fail_clk;
>  }
>
> -if (clock_select >= ARRAY_SIZE(clock_names)) {
> +if (!(BIT(clock_select) & RCAR_SUPPORTED_CLOCKS)) {
>  err = -EINVAL;
>  dev_err(&pdev->dev, "invalid CAN clock selected\n");
>  goto fail_clk;
> --
> 2.7.4




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