Allow specifying cdev's filetype explicitly to support the cases where
the type of a cdev is known apriori, yet cannot be determined by
reading the cdev's content.
Signed-off-by: Andrey Smirnov <andrew.smirnov@xxxxxxxxx>
---
common/filetype.c | 6 ++++++
include/driver.h | 2 ++
2 files changed, 8 insertions(+)
diff --git a/common/filetype.c b/common/filetype.c
index 429911533..e4c8005b5 100644
--- a/common/filetype.c
+++ b/common/filetype.c
@@ -425,6 +425,11 @@ enum filetype cdev_detect_type(const char *name)
if (!cdev)
return type;
+ if (cdev->filetype != filetype_unknown) {
+ type = cdev->filetype;
+ goto cdev_close;
+ }
+
buf = xzalloc(FILE_TYPE_SAFE_BUFSIZE);
ret = cdev_read(cdev, buf, FILE_TYPE_SAFE_BUFSIZE, 0, 0);
if (ret < 0)
@@ -434,6 +439,7 @@ enum filetype cdev_detect_type(const char *name)
err_out:
free(buf);
+cdev_close:
cdev_close(cdev);
return type;
}
diff --git a/include/driver.h b/include/driver.h
index 26ec413bd..fe2d30ab5 100644
--- a/include/driver.h
+++ b/include/driver.h
@@ -22,6 +22,7 @@
#include <linux/list.h>
#include <linux/ioport.h>
#include <of.h>
+#include <filetype.h>
#define FORMAT_DRIVER_NAME_ID "%s%d"
@@ -464,6 +465,7 @@ struct cdev {
struct list_head link_entry, links;
struct list_head partition_entry, partitions;
struct cdev *master;
+ enum filetype filetype;
};
int devfs_create(struct cdev *);
--
2.21.0
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