[media] xc5000: Don't try forever to load the firmware

With the current code, if something bad happens during the
firmware init process, the device will keep trying forever,
and removing it would cause an OOPS.

Instead, try only a limited amount of time. If not, fails.
Signed-off-by: NMauro Carvalho Chehab <m.chehab@samsung.com>

drivers/media/tuners/xc5000.c

@@ -1101,16 +1101,17 @@ static int xc5000_get_status(struct dvb_frontend *fe, u32 *status)
 static int xc_load_fw_and_init_tuner(struct dvb_frontend *fe, int force)
 {
 	struct xc5000_priv *priv = fe->tuner_priv;
-	int ret = 0;
+	int ret, i;
 	u16 pll_lock_status;
 	u16 fw_ck;
 
 	cancel_delayed_work(&priv->timer_sleep);
 
-	if (force || xc5000_is_firmware_loaded(fe) != 0) {
-
-fw_retry:
+	if (!force && xc5000_is_firmware_loaded(fe) == 0)
+		return 0;
 
+	/* Try up to 5 times to load firmware */
+	for (i = 0; i < 5; i++) {
 		ret = xc5000_fwupload(fe);
 		if (ret != 0)
 			return ret;
@@ -1118,25 +1119,25 @@ static int xc_load_fw_and_init_tuner(struct dvb_frontend *fe, int force)
 		msleep(20);
 
 		if (priv->fw_checksum_supported) {
-			if (xc5000_readreg(priv, XREG_FW_CHECKSUM, &fw_ck)
-			    != 0) {
+			if (xc5000_readreg(priv, XREG_FW_CHECKSUM, &fw_ck)) {
 				dprintk(1, "%s() FW checksum reading failed.\n",
 					__func__);
-				goto fw_retry;
+				continue;
 			}
 
-			if (fw_ck == 0) {
+			if (!fw_ck) {
 				dprintk(1, "%s() FW checksum failed = 0x%04x\n",
 					__func__, fw_ck);
-				goto fw_retry;
+				continue;
 			}
 		}
 
 		/* Start the tuner self-calibration process */
-		ret |= xc_initialize(priv);
-
-		if (ret != 0)
-			goto fw_retry;
+		ret = xc_initialize(priv);
+		if (ret) {
+			dprintk(1, "Can't request Self-callibration. Reloading firmware\n");
+			continue;
+		}
 
 		/* Wait for calibration to complete.
 		 * We could continue but XC5000 will clock stretch subsequent
@@ -1146,15 +1147,15 @@ static int xc_load_fw_and_init_tuner(struct dvb_frontend *fe, int force)
 		msleep(100);
 
 		if (priv->init_status_supported) {
-			if (xc5000_readreg(priv, XREG_INIT_STATUS, &fw_ck) != 0) {
+			if (xc5000_readreg(priv, XREG_INIT_STATUS, &fw_ck)) {
 				dprintk(1, "%s() FW failed reading init status.\n",
 					__func__);
-				goto fw_retry;
+				continue;
 			}
 
-			if (fw_ck == 0) {
+			if (!fw_ck) {
 				dprintk(1, "%s() FW init status failed = 0x%04x\n", __func__, fw_ck);
-				goto fw_retry;
+				continue;
 			}
 		}
 
@@ -1164,12 +1165,13 @@ static int xc_load_fw_and_init_tuner(struct dvb_frontend *fe, int force)
 			if (pll_lock_status > 63) {
 				/* PLL is unlocked, force reload of the firmware */
 				printk(KERN_ERR "xc5000: PLL not running after fwload.\n");
-				goto fw_retry;
+				continue;
 			}
 		}
 
 		/* Default to "CABLE" mode */
-		ret |= xc_write_reg(priv, XREG_SIGNALSOURCE, XC_RF_MODE_CABLE);
+		ret = xc_write_reg(priv, XREG_SIGNALSOURCE, XC_RF_MODE_CABLE);
+		break;
 	}
 
 	return ret;