netdev - Re: [PATCH 2/2] net: can: comparison of unsigned variable

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Message-ID: <67e24b2a43564b55960a31c62e5d44ca@BY2FFO11FD055.protection.gbl>
Date:	Tue, 18 Nov 2014 17:47:02 +0100
From:	Michal Simek <michal.simek@...inx.com>
To:	Sudip Mukherjee <sudipm.mukherjee@...il.com>,
	Wolfgang Grandegger <wg@...ndegger.com>,
	Marc Kleine-Budde <mkl@...gutronix.de>,
	Michal Simek <michal.simek@...inx.com>,
	Sören Brinkmann <soren.brinkmann@...inx.com>
CC:	<linux-can@...r.kernel.org>, <netdev@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>,
	<linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/2] net: can: comparison of unsigned variable

On 11/18/2014 02:47 PM, Sudip Mukherjee wrote:
> err was of the type u32. it was being compared with < 0, and being
> an unsigned variable the comparison would have been always false.
> 
> moreover, err was getting the return value from set_reset_mode()
> and xcan_set_bittiming(), and both are returning int.
> 
> Signed-off-by: Sudip Mukherjee <sudip@...torindia.org>
> ---
>  drivers/net/can/xilinx_can.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/net/can/xilinx_can.c b/drivers/net/can/xilinx_can.c
> index 72fe96f..67c2dd4 100644
> --- a/drivers/net/can/xilinx_can.c
> +++ b/drivers/net/can/xilinx_can.c
> @@ -300,7 +300,8 @@ static int xcan_set_bittiming(struct net_device *ndev)
>  static int xcan_chip_start(struct net_device *ndev)
>  {
>  	struct xcan_priv *priv = netdev_priv(ndev);
> -	u32 err, reg_msr, reg_sr_mask;
> +	u32 reg_msr, reg_sr_mask;
> +	int err;
>  	unsigned long timeout;
>  
>  	/* Check if it is in reset mode */
> 

Reviewed-by: Michal Simek <michal.simek@...inx.com>

Thanks,
Michal

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