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From: Manivannan Sadhasivam <mani@kernel.org>
To: Dan Carpenter <dan.carpenter@oracle.com>
Cc: Marc Kleine-Budde <mkl@pengutronix.de>,
	Thomas Kopp <thomas.kopp@microchip.com>,
	Wolfgang Grandegger <wg@grandegger.com>,
	"David S. Miller" <davem@davemloft.net>,
	Jakub Kicinski <kuba@kernel.org>,
	linux-can@vger.kernel.org, netdev@vger.kernel.org,
	kernel-janitors@vger.kernel.org
Subject: Re: [PATCH net] can: mcp251xfd: fix an error pointer dereference in probe
Date: Mon, 3 May 2021 22:17:32 +0530	[thread overview]
Message-ID: <20210503164732.GB3958@thinkpad> (raw)
In-Reply-To: <YJANZf13Qxd5Mhr1@mwanda>

On Mon, May 03, 2021 at 05:49:09PM +0300, Dan Carpenter wrote:
> When we converted this code to use dev_err_probe() we accidentally
> removed a return.  It means that if devm_clk_get() it will lead to
> an Oops when we call clk_get_rate() on the next line.
> 
> Fixes: cf8ee6de2543 ("can: mcp251xfd: mcp251xfd_probe(): use dev_err_probe() to simplify error handling")
> Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>

Reviewed-by: Manivannan Sadhasivam <mani@kernel.org>

Thanks,
Mani

> ---
>  drivers/net/can/spi/mcp251xfd/mcp251xfd-core.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/net/can/spi/mcp251xfd/mcp251xfd-core.c b/drivers/net/can/spi/mcp251xfd/mcp251xfd-core.c
> index 970dc570e7a5..f122976e90da 100644
> --- a/drivers/net/can/spi/mcp251xfd/mcp251xfd-core.c
> +++ b/drivers/net/can/spi/mcp251xfd/mcp251xfd-core.c
> @@ -2885,8 +2885,8 @@ static int mcp251xfd_probe(struct spi_device *spi)
>  
>  	clk = devm_clk_get(&spi->dev, NULL);
>  	if (IS_ERR(clk))
> -		dev_err_probe(&spi->dev, PTR_ERR(clk),
> -			      "Failed to get Oscillator (clock)!\n");
> +		return dev_err_probe(&spi->dev, PTR_ERR(clk),
> +				     "Failed to get Oscillator (clock)!\n");
>  	freq = clk_get_rate(clk);
>  
>  	/* Sanity check */
> -- 
> 2.30.2
> 

      parent reply	other threads:[~2021-05-03 17:00 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-05-03 14:49 [PATCH net] can: mcp251xfd: fix an error pointer dereference in probe Dan Carpenter
2021-05-03 14:53 ` Marc Kleine-Budde
2021-05-03 16:47 ` Manivannan Sadhasivam [this message]

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