On Fri, Mar 23, 2012 at 03:11:45PM +0530, santosh nayak wrote:
> From: Santosh Nayak <santoshprasadnayak@xxxxxxxxx>
>
> Replace kmalloc+memset pair by kzalloc() in 'wl_wds_device_alloc()'.
> Add error handling to avoid null derefernce.
>
> Signed-off-by: Santosh Nayak <santoshprasadnayak@xxxxxxxxx>
> ---
> drivers/staging/wlags49_h2/wl_netdev.c | 8 ++++++--
> 1 files changed, 6 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/staging/wlags49_h2/wl_netdev.c b/drivers/staging/wlags49_h2/wl_netdev.c
> index 9c16f54..426ba04 100644
> --- a/drivers/staging/wlags49_h2/wl_netdev.c
> +++ b/drivers/staging/wlags49_h2/wl_netdev.c
> @@ -1511,8 +1511,12 @@ void wl_wds_device_alloc( struct wl_private *lp )
> for( count = 0; count < NUM_WDS_PORTS; count++ ) {
> struct net_device *dev_wds = NULL;
>
> - dev_wds = kmalloc( sizeof( struct net_device ), GFP_KERNEL );
> - memset( dev_wds, 0, sizeof( struct net_device ));
> + dev_wds = kzalloc(sizeof(struct net_device), GFP_KERNEL);
> + if (unlikely(!dev_wds)) {
NEVER use unlikely unless you are working on scheduler code, or
something else equally time critical. So, take this into consideration,
and Dan's comments, and please redo this, I can't take it as-is.
thanks,
greg k-h
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