media: tuner xc5000 firmware load fixes and improvements

xc5000 releases firmware right after loading it. Change it to save the firmware and release it from xc5000_release(). This helps avoid fecthing firmware when forced firmware load requests come in to change analog tv frequence and when firmware needs to be reloaded after suspend and resume.

Signed-off-by Shuah Khan <[email protected]>

---
 drivers/media/tuners/xc5000.c |   34 ++++++++++++++++++++--------------
 1 file changed, 20 insertions(+), 14 deletions(-)

drivers/media/tuners/xc5000.c +10 -8

index 512fe50..31b1dec 100644
@@ -70,6 +70,8 @@ struct xc5000_priv {
 
 	struct dvb_frontend *fe;
 	struct delayed_work timer_sleep;
+
+	const struct firmware   *firmware;
 };
 
 /* Misc Defines */

@@ -1136,20 +1138,23 @@ static int xc_load_fw_and_init_tuner(struct dvb_frontend *fe, int force)
 	if (!force && xc5000_is_firmware_loaded(fe) == 0)
 		return 0;
 
-	ret = request_firmware(&fw, desired_fw->name,
-			       priv->i2c_props.adap->dev.parent);
-	if (ret) {
-		printk(KERN_ERR "xc5000: Upload failed. (file not found?)\n");
-		return ret;
-	}
-
-	dprintk(1, "firmware read %Zu bytes.\n", fw->size);
+	if (!priv->firmware) {
+		ret = request_firmware(&fw, desired_fw->name,
+					priv->i2c_props.adap->dev.parent);
+		if (ret) {
+			pr_err("xc5000: Upload failed. rc %d\n", ret);
+			return ret;
+		}
+		dprintk(1, "firmware read %Zu bytes.\n", fw->size);

Em Wed, 13 Aug 2014 19:09:23 -0600
Shuah Khan <[email protected]> escreveu:

Quoted 45 lines

xc5000 releases firmware right after loading it. Change it to save the firmware and release it from xc5000_release(). This helps avoid fecthing firmware when forced firmware load requests come in to change analog tv frequence and when firmware needs to be reloaded after suspend and resume.

Signed-off-by Shuah Khan <[email protected]>

---
 drivers/media/tuners/xc5000.c |   34 ++++++++++++++++++++--------------
 1 file changed, 20 insertions(+), 14 deletions(-)

drivers/media/tuners/xc5000.c +10 -8

index 512fe50..31b1dec 100644
@@ -70,6 +70,8 @@ struct xc5000_priv {
 
 	struct dvb_frontend *fe;
 	struct delayed_work timer_sleep;
+
+	const struct firmware   *firmware;
 };
 
 /* Misc Defines */

@@ -1136,20 +1138,23 @@ static int xc_load_fw_and_init_tuner(struct dvb_frontend *fe, int force)
 	if (!force && xc5000_is_firmware_loaded(fe) == 0)
 		return 0;
 
-	ret = request_firmware(&fw, desired_fw->name,
-			       priv->i2c_props.adap->dev.parent);
-	if (ret) {
-		printk(KERN_ERR "xc5000: Upload failed. (file not found?)\n");
-		return ret;
-	}
-
-	dprintk(1, "firmware read %Zu bytes.\n", fw->size);
+	if (!priv->firmware) {
+		ret = request_firmware(&fw, desired_fw->name,
+					priv->i2c_props.adap->dev.parent);
+		if (ret) {
+			pr_err("xc5000: Upload failed. rc %d\n", ret);
+			return ret;
+		}
+		dprintk(1, "firmware read %Zu bytes.\n", fw->size);
 

drivers/media/tuners/xc5000.c static int xc_load_fw_and_init_tuner(struct dvb_frontend *fe, int force) · line 1153

Quoted 9 lines

drivers/media/tuners/xc5000.c +4 -5

-	if (fw->size != desired_fw->size) {
-		printk(KERN_ERR "xc5000: Firmware file with incorrect size\n");
-		ret = -EINVAL;
-		goto err;
-	}
+		if (fw->size != desired_fw->size) {
+			pr_err("xc5000: Firmware file with incorrect size\n");
+			ret = -EINVAL;
+			goto err;

In this case, we should be releasing the firmware too. Btw, this code will also add a memory leak, as priv->firmware will be null, but the firmware was loaded.