ALSA: hda - Add firmware caching to CA0132 codec

Signed-off-by: Ian Minett <ian_minett@creativelabs.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/hda/patch_ca0132.c

@@ -2025,6 +2025,24 @@ static int dspload_image(struct hda_codec *codec,
 	return status;
 }
 
+static const struct firmware *fw_efx;
+
+static int request_firmware_cached(const struct firmware **firmware_p,
+	const char *name, struct device *device)
+{
+	if (*firmware_p)
+		return 0;  /* already loaded */
+	return request_firmware(firmware_p, name, device);
+}
+
+static void release_cached_firmware(void)
+{
+	if (fw_efx) {
+		release_firmware(fw_efx);
+		fw_efx = NULL;
+	}
+}
+
 static bool dspload_is_loaded(struct hda_codec *codec)
 {
 	unsigned int data = 0;
@@ -2542,18 +2560,15 @@ static bool ca0132_download_dsp_images(struct hda_codec *codec)
 {
 	bool dsp_loaded = false;
 	const struct dsp_image_seg *dsp_os_image;
-	const struct firmware *fw_entry;
 
-	if (request_firmware(&fw_entry, EFX_FILE, codec->bus->card->dev) != 0)
+	if (request_firmware_cached(&fw_efx, EFX_FILE,
+				    codec->bus->card->dev) != 0)
 		return false;
 
-	dsp_os_image = (struct dsp_image_seg *)(fw_entry->data);
+	dsp_os_image = (struct dsp_image_seg *)(fw_efx->data);
 	dspload_image(codec, dsp_os_image, 0, 0, true, 0);
 	dsp_loaded = dspload_wait_loaded(codec);
 
-	release_firmware(fw_entry);
-
-
 	return dsp_loaded;
 }
 
@@ -2665,6 +2680,7 @@ static int __init patch_ca0132_init(void)
 
 static void __exit patch_ca0132_exit(void)
 {
+	release_cached_firmware();
 	snd_hda_delete_codec_preset(&ca0132_list);
 }