Re: [PATCH] Fix null pointer error after vmbus loading

[Greg KH <gregkh@suse.de>]

On Wed, Oct 21, 2009 at 07:24:23PM +0000, Haiyang Zhang wrote:
> From: Haiyang Zhang <haiyangz@microsoft.com>
> 
> Fix null pointer error after vmbus loading.
> 
> Cc: Greg Kroah-Hartman <gregkh@suse.de>
> Signed-off-by: Hank Janssen <hjanssen@microsoft.com>
> Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
> 
> ---
> diff --git a/drivers/staging/hv/vmbus_drv.c b/drivers/staging/hv/vmbus_drv.c
> index 582318f..11431cc 100644
> --- a/drivers/staging/hv/vmbus_drv.c
> +++ b/drivers/staging/hv/vmbus_drv.c
> @@ -538,9 +538,10 @@ static int vmbus_child_device_register(struct hv_device *root_device_obj,
>                    child_device_ctx);
> 
>         /* Make sure we are not registered already */
> -       if (strlen(dev_name(&child_device_ctx->device)) != 0) {
> +       if (dev_name(&child_device_ctx->device) != NULL &&
> +           strlen(dev_name(&child_device_ctx->device)) != 0) {

Also, this patch was sent in html format, and all of the tabs were
converted to spaces, making it impossible to apply.

Please read the file, Documentation/email-clients.txt and follow the
suggestions there in order to be able to send patches that will both
appear on the linux-kernel mailing list, and be able to be applied
properly.

thanks,

greg k-h