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sparc64: Enhance search for VIO device in MDESC

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Enhances search for VIO device in MDESC by leveraging already existing
MDESC APIs. Enhances changes in earlier patch,
"sparc: Machine description indices can vary", by using existing MD
search functions. It also specifies a match function, thereby
enabling device_find_child() to use it for the purpose of matching
device nodes in MDESC.

An API to find VDEV node in MDESC based on its md_node_info is also
added. It is planned to be used by VIO device clients in the future.

Signed-off-by: Jagannathan Raman <jag.raman@oracle.com>
Reviewed-by: Liam Merwick <liam.merwick@oracle.com>
Reviewed-by: Shannon Nelson <shannon.nelson@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jag Raman 2017-06-23 14:58:39 -04:00 • committed by David S. Miller
parent aa512d5ede
commit f4d29ca7de
3 changed files with 64 additions and 63 deletions
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2
arch/sparc/kernel/mdesc.c
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@ -574,6 +574,7 @@ u64 mdesc_get_node(struct mdesc_handle *hp, const char *node_name,
return hp_node;
}
EXPORT_SYMBOL(mdesc_get_node);
int mdesc_get_node_info(struct mdesc_handle *hp, u64 node,
const char *node_name, union md_node_info *node_info)
@ -603,6 +604,7 @@ int mdesc_get_node_info(struct mdesc_handle *hp, u64 node,
return 0;
}
EXPORT_SYMBOL(mdesc_get_node_info);
static struct mdesc_elem *node_block(struct mdesc_hdr *mdesc)
{