Re: [PATCH 4/6] ibmvscsi: Use of_root to access OF device tree root node

From: Johannes Thumshirn
Date: Thu Feb 04 2016 - 03:45:43 EST


On Wed, Feb 03, 2016 at 05:28:32PM -0600, Tyrel Datwyler wrote:
> The root node of the OF device tree is exported as of_root. No need
> to look up the root by path name. Instead just get a reference
> directly via of_root.
>
> Signed-off-by: Tyrel Datwyler <tyreld@xxxxxxxxxxxxxxxxxx>
> ---
> drivers/scsi/ibmvscsi/ibmvscsi.c | 14 ++++++--------
> 1 file changed, 6 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/scsi/ibmvscsi/ibmvscsi.c b/drivers/scsi/ibmvscsi/ibmvscsi.c
> index 7e51615..47cfe33 100644
> --- a/drivers/scsi/ibmvscsi/ibmvscsi.c
> +++ b/drivers/scsi/ibmvscsi/ibmvscsi.c
> @@ -248,25 +248,23 @@ static void ibmvscsi_task(void *data)
>
> static void gather_partition_info(void)
> {
> - struct device_node *rootdn;
> -
> const char *ppartition_name;
> const __be32 *p_number_ptr;
>
> /* Retrieve information about this partition */
> - rootdn = of_find_node_by_path("/");
> - if (!rootdn) {
> + if (!of_root)
> return;
> - }
>
> - ppartition_name = of_get_property(rootdn, "ibm,partition-name", NULL);
> + of_node_get(of_root);
> +
> + ppartition_name = of_get_property(of_root, "ibm,partition-name", NULL);
> if (ppartition_name)
> strncpy(partition_name, ppartition_name,
> sizeof(partition_name));
> - p_number_ptr = of_get_property(rootdn, "ibm,partition-no", NULL);
> + p_number_ptr = of_get_property(of_root, "ibm,partition-no", NULL);
> if (p_number_ptr)
> partition_number = of_read_number(p_number_ptr, 1);
> - of_node_put(rootdn);
> + of_node_put(of_root);
> }
>
> static void set_adapter_info(struct ibmvscsi_host_data *hostdata)
> --
> 2.5.0
>
> --
> To unsubscribe from this list: send the line "unsubscribe linux-scsi" in
> the body of a message to majordomo@xxxxxxxxxxxxxxx
> More majordomo info at http://vger.kernel.org/majordomo-info.html

Reviewed-by: Johannes Thumshirn <jthumshirn@xxxxxxx>
--
Johannes Thumshirn Storage
jthumshirn@xxxxxxx +49 911 74053 689
SUSE LINUX GmbH, Maxfeldstr. 5, 90409 Nürnberg
GF: Felix Imendörffer, Jane Smithard, Graham Norton
HRB 21284 (AG Nürnberg)
Key fingerprint = EC38 9CAB C2C4 F25D 8600 D0D0 0393 969D 2D76 0850