disk: introduce get_device()
This patch introduces function get_device(). This looks up a
block_dev_desc_t from an interface name (e.g. mmc) and device number
(e.g. 0). This function is essentially the non-partition-specific
prefix of get_device_and_partition().
Signed-off-by: Stephen Warren <swarren@nvidia.com>
diff --git a/disk/part.c b/disk/part.c
index f0afd89..ed6bbe2 100644
--- a/disk/part.c
+++ b/disk/part.c
@@ -443,6 +443,28 @@
return -1;
}
+int get_device(const char *ifname, const char *dev_str,
+ block_dev_desc_t **dev_desc)
+{
+ char *ep;
+ int dev;
+
+ dev = simple_strtoul(dev_str, &ep, 16);
+ if (*ep) {
+ printf("** Bad device specification %s %s **\n",
+ ifname, dev_str);
+ return -1;
+ }
+
+ *dev_desc = get_dev(ifname, dev);
+ if (!(*dev_desc) || ((*dev_desc)->type == DEV_TYPE_UNKNOWN)) {
+ printf("** Bad device %s %s **\n", ifname, dev_str);
+ return -1;
+ }
+
+ return dev;
+}
+
int get_device_and_partition(const char *ifname, const char *dev_str,
block_dev_desc_t **dev_desc,
disk_partition_t *info)
diff --git a/include/part.h b/include/part.h
index a6d06f3..144df4e 100644
--- a/include/part.h
+++ b/include/part.h
@@ -112,6 +112,8 @@
void print_part (block_dev_desc_t *dev_desc);
void init_part (block_dev_desc_t *dev_desc);
void dev_print(block_dev_desc_t *dev_desc);
+int get_device(const char *ifname, const char *dev_str,
+ block_dev_desc_t **dev_desc);
int get_device_and_partition(const char *ifname, const char *dev_str,
block_dev_desc_t **dev_desc,
disk_partition_t *info);
@@ -131,6 +133,9 @@
static inline void print_part (block_dev_desc_t *dev_desc) {}
static inline void init_part (block_dev_desc_t *dev_desc) {}
static inline void dev_print(block_dev_desc_t *dev_desc) {}
+static inline int get_device(const char *ifname, const char *dev_str,
+ block_dev_desc_t **dev_desc)
+{ return -1; }
static inline int get_device_and_partition(const char *ifname,
const char *dev_str,
block_dev_desc_t **dev_desc,