1#include <linux/vmalloc.h>
 2#include <linux/module.h>
 3#include <linux/fs.h>
 4#include <linux/file.h>
 5#include <linux/mm.h>
 6#include <linux/sched.h>
 7#include <asm/uaccess.h>
 8#include "oss/sound_firmware.h"
 9
10static int do_mod_firmware_load(const char *fn, char **fp)
11{
12	struct file* filp;
13	long l;
14	char *dp;
15
16	filp = filp_open(fn, 0, 0);
17	if (IS_ERR(filp))
18	{
19		printk(KERN_INFO "Unable to load '%s'.\n", fn);
20		return 0;
21	}
22	l = i_size_read(file_inode(filp));
23	if (l <= 0 || l > 131072)
24	{
25		printk(KERN_INFO "Invalid firmware '%s'\n", fn);
26		fput(filp);
27		return 0;
28	}
29	dp = vmalloc(l);
30	if (dp == NULL)
31	{
32		printk(KERN_INFO "Out of memory loading '%s'.\n", fn);
33		fput(filp);
34		return 0;
35	}
36	if (kernel_read(filp, 0, dp, l) != l)
37	{
38		printk(KERN_INFO "Failed to read '%s'.\n", fn);
39		vfree(dp);
40		fput(filp);
41		return 0;
42	}
43	fput(filp);
44	*fp = dp;
45	return (int) l;
46}
47
48/**
49 *	mod_firmware_load - load sound driver firmware
50 *	@fn: filename
51 *	@fp: return for the buffer.
52 *
53 *	Load the firmware for a sound module (up to 128K) into a buffer.
54 *	The buffer is returned in *fp. It is allocated with vmalloc so is
55 *	virtually linear and not DMAable. The caller should free it with
56 *	vfree when finished.
57 *
58 *	The length of the buffer is returned on a successful load, the
59 *	value zero on a failure.
60 *
61 *	Caution: This API is not recommended. Firmware should be loaded via
62 *	request_firmware.
63 */
64 
65int mod_firmware_load(const char *fn, char **fp)
66{
67	int r;
68	mm_segment_t fs = get_fs();
69
70	set_fs(get_ds());
71	r = do_mod_firmware_load(fn, fp);
72	set_fs(fs);
73	return r;
74}
75EXPORT_SYMBOL(mod_firmware_load);
76
77MODULE_LICENSE("GPL");