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 <[email protected]>

sound/Makefile

@@ -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/ \

sound/oss/sound_firmware.h

@@ -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;
+}