firmware_class: Fix the file size check

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 <ben@decadent.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/base/firmware_class.c b/drivers/base/firmware_class.c
index 54592e6..8a97ddf 100644 (file)
--- a/drivers/base/firmware_class.c
+++ b/drivers/base/firmware_class.c
@@ -280,21 +280,21 @@ module_param_string(path, fw_path_para, sizeof(fw_path_para), 0644);
 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 int fw_read_file_contents(struct file *file, struct firmware_buf *fw_buf)
 {
-       long size;
+       int size;
        char *buf;
        int rc;