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sound: oss: Use kernel_read_file_from_path() for mod_firmware_load() 

Since recently we have kernel_read_file_from_path(), and it's doing
the same thing as our own home-baked mod_firmware_load().  Let's use
the official API function and clean up the old code.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai 2016-07-25 15:39:53 +02:00
parent 4a6baf1b35
commit 0984d159c8
3 changed files with 28 additions and 79 deletions
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1
sound/Makefile
View File

@ -2,7 +2,6 @@
#
obj-$(CONFIG_SOUND) += soundcore.o
obj-$(CONFIG_SOUND_PRIME) += sound_firmware.o
obj-$(CONFIG_SOUND_PRIME) += oss/
obj-$(CONFIG_DMASOUND) += oss/
obj-$(CONFIG_SND) += core/ i2c/ drivers/ isa/ pci/ ppc/ arm/ sh/ synth/ usb/ \

29
sound/oss/sound_firmware.h
View File

@ -1,2 +1,29 @@
extern int mod_firmware_load(const char *fn, char **fp);
#include <linux/fs.h>
/**
* mod_firmware_load - load sound driver firmware
* @fn: filename
* @fp: return for the buffer.
*
* Load the firmware for a sound module (up to 128K) into a buffer.
* The buffer is returned in *fp. It is allocated with vmalloc so is
* virtually linear and not DMAable. The caller should free it with
* vfree when finished.
*
* The length of the buffer is returned on a successful load, the
* value zero on a failure.
*
* Caution: This API is not recommended. Firmware should be loaded via
* request_firmware.
*/
static inline int mod_firmware_load(const char *fn, char **fp)
{
loff_t size;
int err;
err = kernel_read_file_from_path((char *)fn, (void **)fp, &size,
131072, READING_FIRMWARE);
if (err < 0)
return 0;
return size;
}

77
sound/sound_firmware.c
View File

@ -1,77 +0,0 @@
#include <linux/vmalloc.h>
#include <linux/module.h>
#include <linux/fs.h>
#include <linux/file.h>
#include <linux/mm.h>
#include <linux/sched.h>
#include <asm/uaccess.h>
#include "oss/sound_firmware.h"
static int do_mod_firmware_load(const char *fn, char **fp)
{
struct file* filp;
long l;
char *dp;
filp = filp_open(fn, 0, 0);
if (IS_ERR(filp))
{
printk(KERN_INFO "Unable to load '%s'.\n", fn);
return 0;
}
l = i_size_read(file_inode(filp));
if (l <= 0 || l > 131072)
{
printk(KERN_INFO "Invalid firmware '%s'\n", fn);
fput(filp);
return 0;
}
dp = vmalloc(l);
if (dp == NULL)
{
printk(KERN_INFO "Out of memory loading '%s'.\n", fn);
fput(filp);
return 0;
}
if (kernel_read(filp, 0, dp, l) != l)
{
printk(KERN_INFO "Failed to read '%s'.\n", fn);
vfree(dp);
fput(filp);
return 0;
}
fput(filp);
*fp = dp;
return (int) l;
}
/**
* mod_firmware_load - load sound driver firmware
* @fn: filename
* @fp: return for the buffer.
*
* Load the firmware for a sound module (up to 128K) into a buffer.
* The buffer is returned in *fp. It is allocated with vmalloc so is
* virtually linear and not DMAable. The caller should free it with
* vfree when finished.
*
* The length of the buffer is returned on a successful load, the
* value zero on a failure.
*
* Caution: This API is not recommended. Firmware should be loaded via
* request_firmware.
*/
int mod_firmware_load(const char *fn, char **fp)
{
int r;
mm_segment_t fs = get_fs();
set_fs(get_ds());
r = do_mod_firmware_load(fn, fp);
set_fs(fs);
return r;
}
EXPORT_SYMBOL(mod_firmware_load);
MODULE_LICENSE("GPL");