[PATCH] firmware_class: Fix the file size check

[Ben Hutchings]

We expect to read firmware blobs with a single call to kernel_read(),
which returns int.  Therefore the size must be within the range of
int, not long.

Signed-off-by: Ben Hutchings <b...@decadent.org.uk>
---
--- a/drivers/base/firmware_class.c
+++ b/drivers/base/firmware_class.c
@@ -270,21 +270,21 @@ module_param_string(path, fw_path_para,
 MODULE_PARM_DESC(path, "customized firmware image search path with a higher 
priority than default path");
 
 /* Don't inline this: 'struct kstat' is biggish */
-static noinline_for_stack long fw_file_size(struct file *file)
+static noinline_for_stack int fw_file_size(struct file *file)
 {
        struct kstat st;
        if (vfs_getattr(&file->f_path, &st))
                return -1;
        if (!S_ISREG(st.mode))
                return -1;
-       if (st.size != (long)st.size)
+       if (st.size != (int)st.size)
                return -1;
        return st.size;
 }
 
 static bool fw_read_file_contents(struct file *file, struct firmware_buf 
*fw_buf)
 {
-       long size;
+       int size;
        char *buf;
 
        size = fw_file_size(file);

-- 
Ben Hutchings
Kids!  Bringing about Armageddon can be dangerous.  Do not attempt it in
your own home. - Terry Pratchett and Neil Gaiman, `Good Omens'

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