From: Rémi Cardona <remi.cardona@smartjog.com>
Date: Fri, 28 Sep 2012 11:59:27 +0000 (-0300)
Subject: [media] ds3000: remove useless 'locking'
X-Git-Tag: MMI-PSA29.97-13-9~14196^2~714
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=b41a536cf9806c3478b2fa68d59edafd0787e8aa;p=GitHub%2FMotorolaMobilityLLC%2Fkernel-slsi.git

[media] ds3000: remove useless 'locking'

Since b9bf2eafaad9c1ef02fb3db38c74568be601a43a, the function
ds3000_firmware_ondemand() is called only once during init. This
locking scheme may have been useful when the firmware was loaded at
each tune.
Furthermore, it looks like this 'lock' was put in to prevent concurrent
access (and not recursion as the comments suggest). However, this open-
coded mechanism is anything but race-free and should have used a proper
mutex.

Signed-off-by: Rémi Cardona <remi.cardona@smartjog.com>
Reviewed-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
---

diff --git a/drivers/media/dvb-frontends/ds3000.c b/drivers/media/dvb-frontends/ds3000.c
index c84cd98a9150..60a529e3833f 100644
--- a/drivers/media/dvb-frontends/ds3000.c
+++ b/drivers/media/dvb-frontends/ds3000.c
@@ -30,7 +30,6 @@
 #include "ds3000.h"
 
 static int debug;
-static int force_fw_upload;
 
 #define dprintk(args...) \
 	do { \
@@ -234,7 +233,6 @@ struct ds3000_state {
 	struct i2c_adapter *i2c;
 	const struct ds3000_config *config;
 	struct dvb_frontend frontend;
-	u8 skip_fw_load;
 	/* previous uncorrected block counter for DVB-S2 */
 	u16 prevUCBS2;
 };
@@ -397,9 +395,6 @@ static int ds3000_firmware_ondemand(struct dvb_frontend *fe)
 	if (ret < 0)
 		return ret;
 
-	if (state->skip_fw_load || !force_fw_upload)
-		return 0;	/* Firmware already uploaded, skipping */
-
 	/* Load firmware */
 	/* request the firmware, this will block until someone uploads it */
 	printk(KERN_INFO "%s: Waiting for firmware upload (%s)...\n", __func__,
@@ -413,9 +408,6 @@ static int ds3000_firmware_ondemand(struct dvb_frontend *fe)
 		return ret;
 	}
 
-	/* Make sure we don't recurse back through here during loading */
-	state->skip_fw_load = 1;
-
 	ret = ds3000_load_firmware(fe, fw);
 	if (ret)
 		printk("%s: Writing firmware to device failed\n", __func__);
@@ -425,9 +417,6 @@ static int ds3000_firmware_ondemand(struct dvb_frontend *fe)
 	dprintk("%s: Firmware upload %s\n", __func__,
 			ret == 0 ? "complete" : "failed");
 
-	/* Ensure firmware is always loaded if required */
-	state->skip_fw_load = 0;
-
 	return ret;
 }
 
@@ -1309,9 +1298,6 @@ static struct dvb_frontend_ops ds3000_ops = {
 module_param(debug, int, 0644);
 MODULE_PARM_DESC(debug, "Activates frontend debugging (default:0)");
 
-module_param(force_fw_upload, int, 0644);
-MODULE_PARM_DESC(force_fw_upload, "Force firmware upload (default:0)");
-
 MODULE_DESCRIPTION("DVB Frontend module for Montage Technology "
 			"DS3000/TS2020 hardware");
 MODULE_AUTHOR("Konstantin Dimitrov");