[PATCH] release_firmware() fixes

From: Magnus Damm <magnus@valinux.co.jp>

Use release_firmware() to free requested resources.

According to Documentation/firmware_class/README the request_firmware()
call should be followed by a release_firmware().  Some drivers do not
however free the firmware previously allocated with request_firmware().
This patch tries to fix this by making sure that release_firmware() is used
as expected.

kernel-sync: backport from kernel to v4l/dvb tree

Signed-off-by: Magnus Damm <magnus@valinux.co.jp>
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Cc: Mauro Carvalho Chehab <mchehab@infradead.org>
Cc: "John W. Linville" <linville@tuxdriver.com>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

5 files changed, 8 insertions, 5 deletions

diff --git a/linux/drivers/media/dvb/frontends/nxt200x.c b/linux/drivers/media/dvb/frontends/nxt200x.c
index 55671cb52..87c286ee6 100644
--- a/linux/drivers/media/dvb/frontends/nxt200x.c
+++ b/linux/drivers/media/dvb/frontends/nxt200x.c
@@ -896,9 +896,9 @@ static int nxt2002_init(struct dvb_frontend* fe)
 	}
 
 	ret = nxt2002_load_firmware(fe, fw);
+	release_firmware(fw);
 	if (ret) {
 		printk("nxt2002: Writing firmware to device failed\n");
-		release_firmware(fw);
 		return ret;
 	}
 	printk("nxt2002: Firmware upload complete\n");
@@ -960,9 +960,9 @@ static int nxt2004_init(struct dvb_frontend* fe)
 	}
 
 	ret = nxt2004_load_firmware(fe, fw);
+	release_firmware(fw);
 	if (ret) {
 		printk("nxt2004: Writing firmware to device failed\n");
-		release_firmware(fw);
 		return ret;
 	}
 	printk("nxt2004: Firmware upload complete\n");
diff --git a/linux/drivers/media/dvb/frontends/or51211.c b/linux/drivers/media/dvb/frontends/or51211.c
index 26bed616f..2bf124b53 100644
--- a/linux/drivers/media/dvb/frontends/or51211.c
+++ b/linux/drivers/media/dvb/frontends/or51211.c
@@ -437,10 +437,10 @@ static int or51211_init(struct dvb_frontend* fe)
 		}
 
 		ret = or51211_load_firmware(fe, fw);
+		release_firmware(fw);
 		if (ret) {
 			printk(KERN_WARNING "or51211: Writing firmware to "
 			       "device failed!\n");
-			release_firmware(fw);
 			return ret;
 		}
 		printk(KERN_INFO "or51211: Firmware upload complete.\n");
diff --git a/linux/drivers/media/dvb/frontends/sp8870.c b/linux/drivers/media/dvb/frontends/sp8870.c
index 44ec5b9a4..d98fd5c2e 100644
--- a/linux/drivers/media/dvb/frontends/sp8870.c
+++ b/linux/drivers/media/dvb/frontends/sp8870.c
@@ -318,7 +318,6 @@ static int sp8870_init (struct dvb_frontend* fe)
 	printk("sp8870: waiting for firmware upload (%s)...\n", SP8870_DEFAULT_FIRMWARE);
 	if (state->config->request_firmware(fe, &fw, SP8870_DEFAULT_FIRMWARE)) {
 		printk("sp8870: no firmware upload (timeout or file not found?)\n");
-		release_firmware(fw);
 		return -EIO;
 	}
 
@@ -327,6 +326,7 @@ static int sp8870_init (struct dvb_frontend* fe)
 		release_firmware(fw);
 		return -EIO;
 	}
+	release_firmware(fw);
 	printk("sp8870: firmware upload complete\n");
 
 	/* enable TS output and interface pins */
diff --git a/linux/drivers/media/dvb/frontends/sp887x.c b/linux/drivers/media/dvb/frontends/sp887x.c
index b0a2b02f6..5c2f8f4e0 100644
--- a/linux/drivers/media/dvb/frontends/sp887x.c
+++ b/linux/drivers/media/dvb/frontends/sp887x.c
@@ -520,9 +520,9 @@ static int sp887x_init(struct dvb_frontend* fe)
 		}
 
 		ret = sp887x_initial_setup(fe, fw);
+		release_firmware(fw);
 		if (ret) {
 			printk("sp887x: writing firmware to device failed\n");
-			release_firmware(fw);
 			return ret;
 		}
 		printk("sp887x: firmware upload complete\n");
diff --git a/linux/drivers/media/video/cx88/cx88-blackbird.c b/linux/drivers/media/video/cx88/cx88-blackbird.c
index cdc4e76fe..5888eb2dd 100644
--- a/linux/drivers/media/video/cx88/cx88-blackbird.c
+++ b/linux/drivers/media/video/cx88/cx88-blackbird.c
@@ -464,11 +464,13 @@ static int blackbird_load_firmware(struct cx8802_dev *dev)
 	if (firmware->size != BLACKBIRD_FIRM_IMAGE_SIZE) {
 		dprintk(0, "ERROR: Firmware size mismatch (have %zd, expected %d)\n",
 			firmware->size, BLACKBIRD_FIRM_IMAGE_SIZE);
+		release_firmware(firmware);
 		return -1;
 	}
 
 	if (0 != memcmp(firmware->data, magic, 8)) {
 		dprintk(0, "ERROR: Firmware magic mismatch, wrong file?\n");
+		release_firmware(firmware);
 		return -1;
 	}
 
@@ -489,6 +491,7 @@ static int blackbird_load_firmware(struct cx8802_dev *dev)
 	}
 	if (checksum) {
 		dprintk(0, "ERROR: Firmware load failed (checksum mismatch).\n");
+		release_firmware(firmware);
 		return -1;
 	}
 	release_firmware(firmware);