linux-kernel - Re: [PATCH] hotplug/drc-info: ininitialize fndit to zero

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Message-ID: <20190320221257.GI251185@google.com>
Date:   Wed, 20 Mar 2019 17:12:57 -0500
From:   Bjorn Helgaas <helgaas@...nel.org>
To:     Colin King <colin.king@...onical.com>
Cc:     Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Michael Ellerman <mpe@...erman.id.au>,
        Tyrel Datwyler <tyreld@...ux.vnet.ibm.com>,
        linuxppc-dev@...ts.ozlabs.org, linux-pci@...r.kernel.org,
        kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org,
        Michael Bringmann <mwb@...ux.vnet.ibm.com>
Subject: Re: [PATCH] hotplug/drc-info: ininitialize fndit to zero

[+cc Michael B (original author)]

On Sat, Mar 16, 2019 at 09:40:16PM +0000, Colin King wrote:
> From: Colin Ian King <colin.king@...onical.com>
> 
> Currently variable fndit is not initialized and contains a
> garbage value, later it is set to 1 if a drc entry is found.
> Ensure fndit is not containing garbage by initializing it to
> zero. Also remove an extraneous space at the end of an
> sprintf call.
> 
> Detected by static analysis with cppcheck.
> 
> Fixes: 2fcf3ae508c2 ("hotplug/drc-info: Add code to search ibm,drc-info property")
> Signed-off-by: Colin Ian King <colin.king@...onical.com>

Michael E, I assume you'll take this since you took the original?
Let me know if you want me to.

> ---
>  drivers/pci/hotplug/rpaphp_core.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/pci/hotplug/rpaphp_core.c b/drivers/pci/hotplug/rpaphp_core.c
> index bcd5d357ca23..28213f44f64a 100644
> --- a/drivers/pci/hotplug/rpaphp_core.c
> +++ b/drivers/pci/hotplug/rpaphp_core.c
> @@ -230,7 +230,7 @@ static int rpaphp_check_drc_props_v2(struct device_node *dn, char *drc_name,
>  	struct of_drc_info drc;
>  	const __be32 *value;
>  	char cell_drc_name[MAX_DRC_NAME_LEN];
> -	int j, fndit;
> +	int j, fndit = 0;
>  
>  	info = of_find_property(dn->parent, "ibm,drc-info", NULL);
>  	if (info == NULL)
> @@ -254,7 +254,7 @@ static int rpaphp_check_drc_props_v2(struct device_node *dn, char *drc_name,
>  	/* Found it */
>  
>  	if (fndit)
> -		sprintf(cell_drc_name, "%s%d", drc.drc_name_prefix, 
> +		sprintf(cell_drc_name, "%s%d", drc.drc_name_prefix,
>  			my_index);
>  
>  	if (((drc_name == NULL) ||
> -- 
> 2.20.1
>