[PATCH v2] [media] Use common error handling code in 20 functions

From: SF Markus Elfring
Date: Mon Feb 19 2018 - 13:13:52 EST

From: Markus Elfring <elfring@xxxxxxxxxxxxxxxxxxxxx>
Date: Mon, 19 Feb 2018 18:50:40 +0100

Adjust jump targets so that a bit of exception handling can be better
reused at the end of these functions.

This issue was partly detected by using the Coccinelle software.

Signed-off-by: Markus Elfring <elfring@xxxxxxxxxxxxxxxxxxxxx>
---

v2:
Hans Verkuil insisted on patch squashing. Thus several changes
were recombined based on source files from Linux next-20180216.

The implementation of the function "tda8261_set_params" was improved
after a notification by Christoph BÃhmwalder on 2017-09-26.

drivers/media/dvb-core/dmxdev.c | 16 ++++----
drivers/media/dvb-frontends/tda1004x.c | 20 ++++++----
drivers/media/dvb-frontends/tda8261.c | 19 ++++++----
drivers/media/pci/bt8xx/dst.c | 19 ++++++----
drivers/media/pci/bt8xx/dst_ca.c | 30 +++++++--------
drivers/media/pci/cx88/cx88-input.c | 17 +++++----
drivers/media/platform/omap3isp/ispvideo.c | 29 +++++++--------
.../media/platform/qcom/camss-8x16/camss-csid.c | 20 +++++-----
drivers/media/tuners/tuner-xc2028.c | 30 +++++++--------
drivers/media/usb/cpia2/cpia2_usb.c | 13 ++++---
drivers/media/usb/gspca/gspca.c | 17 +++++----
drivers/media/usb/gspca/sn9c20x.c | 17 +++++----
drivers/media/usb/pvrusb2/pvrusb2-ioread.c | 10 +++--
drivers/media/usb/tm6000/tm6000-cards.c | 7 ++--
drivers/media/usb/tm6000/tm6000-dvb.c | 11 ++++--
drivers/media/usb/tm6000/tm6000-video.c | 13 ++++---
drivers/media/usb/ttusb-budget/dvb-ttusb-budget.c | 13 +++----
drivers/media/usb/ttusb-dec/ttusb_dec.c | 43 ++++++++--------------
drivers/media/usb/uvc/uvc_v4l2.c | 13 ++++---
19 files changed, 180 insertions(+), 177 deletions(-)

diff --git a/drivers/media/dvb-core/dmxdev.c b/drivers/media/dvb-core/dmxdev.c
index 6d53af00190e..6a0411c91195 100644
--- a/drivers/media/dvb-core/dmxdev.c
+++ b/drivers/media/dvb-core/dmxdev.c
@@ -645,18 +645,18 @@ static int dvb_dmxdev_start_feed(struct dmxdev *dmxdev,
tsfeed->priv = filter;

ret = tsfeed->set(tsfeed, feed->pid, ts_type, ts_pes, timeout);
- if (ret < 0) {
- dmxdev->demux->release_ts_feed(dmxdev->demux, tsfeed);
- return ret;
- }
+ if (ret < 0)
+ goto release_feed;

ret = tsfeed->start_filtering(tsfeed);
- if (ret < 0) {
- dmxdev->demux->release_ts_feed(dmxdev->demux, tsfeed);
- return ret;
- }
+ if (ret < 0)
+ goto release_feed;

return 0;
+
+release_feed:
+ dmxdev->demux->release_ts_feed(dmxdev->demux, tsfeed);
+ return ret;
}

static int dvb_dmxdev_filter_start(struct dmxdev_filter *filter)
diff --git a/drivers/media/dvb-frontends/tda1004x.c b/drivers/media/dvb-frontends/tda1004x.c
index 58e3beff5adc..85ca111fc8c4 100644
--- a/drivers/media/dvb-frontends/tda1004x.c
+++ b/drivers/media/dvb-frontends/tda1004x.c
@@ -1299,20 +1299,22 @@ struct dvb_frontend* tda10045_attach(const struct tda1004x_config* config,
id = tda1004x_read_byte(state, TDA1004X_CHIPID);
if (id < 0) {
printk(KERN_ERR "tda10045: chip is not answering. Giving up.\n");
- kfree(state);
- return NULL;
+ goto free_state;
}

if (id != 0x25) {
printk(KERN_ERR "Invalid tda1004x ID = 0x%02x. Can't proceed\n", id);
- kfree(state);
- return NULL;
+ goto free_state;
}

/* create dvb_frontend */
memcpy(&state->frontend.ops, &tda10045_ops, sizeof(struct dvb_frontend_ops));
state->frontend.demodulator_priv = state;
return &state->frontend;
+
+free_state:
+ kfree(state);
+ return NULL;
}

static const struct dvb_frontend_ops tda10046_ops = {
@@ -1369,19 +1371,21 @@ struct dvb_frontend* tda10046_attach(const struct tda1004x_config* config,
id = tda1004x_read_byte(state, TDA1004X_CHIPID);
if (id < 0) {
printk(KERN_ERR "tda10046: chip is not answering. Giving up.\n");
- kfree(state);
- return NULL;
+ goto free_state;
}
if (id != 0x46) {
printk(KERN_ERR "Invalid tda1004x ID = 0x%02x. Can't proceed\n", id);
- kfree(state);
- return NULL;
+ goto free_state;
}

/* create dvb_frontend */
memcpy(&state->frontend.ops, &tda10046_ops, sizeof(struct dvb_frontend_ops));
state->frontend.demodulator_priv = state;
return &state->frontend;
+
+free_state:
+ kfree(state);
+ return NULL;
}

module_param(debug, int, 0644);
diff --git a/drivers/media/dvb-frontends/tda8261.c b/drivers/media/dvb-frontends/tda8261.c
index f72a54e7eb23..7b9a29939b74 100644
--- a/drivers/media/dvb-frontends/tda8261.c
+++ b/drivers/media/dvb-frontends/tda8261.c
@@ -129,18 +129,17 @@ static int tda8261_set_params(struct dvb_frontend *fe)

/* Set params */
err = tda8261_write(state, buf);
- if (err < 0) {
- pr_err("%s: I/O Error\n", __func__);
- return err;
- }
+ if (err < 0)
+ goto report_failure;
+
/* sleep for some time */
pr_debug("%s: Waiting to Phase LOCK\n", __func__);
msleep(20);
/* check status */
- if ((err = tda8261_get_status(fe, &status)) < 0) {
- pr_err("%s: I/O Error\n", __func__);
- return err;
- }
+ err = tda8261_get_status(fe, &status);
+ if (err < 0)
+ goto report_failure;
+
if (status == 1) {
pr_debug("%s: Tuner Phase locked: status=%d\n", __func__,
status);
@@ -150,6 +149,10 @@ static int tda8261_set_params(struct dvb_frontend *fe)
}

return 0;
+
+report_failure:
+ pr_err("%s: I/O Error\n", __func__);
+ return err;
}

static void tda8261_release(struct dvb_frontend *fe)
diff --git a/drivers/media/pci/bt8xx/dst.c b/drivers/media/pci/bt8xx/dst.c
index 4f0bba9e4c48..7014cb6a0ad6 100644
--- a/drivers/media/pci/bt8xx/dst.c
+++ b/drivers/media/pci/bt8xx/dst.c
@@ -134,17 +134,20 @@ EXPORT_SYMBOL(rdc_reset_state);
static int rdc_8820_reset(struct dst_state *state)
{
dprintk(3, "Resetting DST\n");
- if (dst_gpio_outb(state, RDC_8820_RESET, RDC_8820_RESET, 0, NO_DELAY) < 0) {
- pr_err("dst_gpio_outb ERROR !\n");
- return -1;
- }
+ if (dst_gpio_outb(state, RDC_8820_RESET, RDC_8820_RESET, 0, NO_DELAY)
+ < 0)
+ goto report_failure;
+
udelay(1000);
- if (dst_gpio_outb(state, RDC_8820_RESET, RDC_8820_RESET, RDC_8820_RESET, DELAY) < 0) {
- pr_err("dst_gpio_outb ERROR !\n");
- return -1;
- }
+ if (dst_gpio_outb(state, RDC_8820_RESET, RDC_8820_RESET,
+ RDC_8820_RESET, DELAY) < 0)
+ goto report_failure;

return 0;
+
+report_failure:
+ pr_err("dst_gpio_outb ERROR !\n");
+ return -1;
}

static int dst_pio_enable(struct dst_state *state)
diff --git a/drivers/media/pci/bt8xx/dst_ca.c b/drivers/media/pci/bt8xx/dst_ca.c
index 0a7623c0fc8e..26e05a8457e6 100644
--- a/drivers/media/pci/bt8xx/dst_ca.c
+++ b/drivers/media/pci/bt8xx/dst_ca.c
@@ -83,33 +83,33 @@ static int dst_ci_command(struct dst_state* state, u8 * data, u8 *ca_string, u8

if (write_dst(state, data, len)) {
dprintk(verbose, DST_CA_INFO, 1, " Write not successful, trying to recover");
- dst_error_recovery(state);
- goto error;
+ goto error_recovery;
}
if ((dst_pio_disable(state)) < 0) {
dprintk(verbose, DST_CA_ERROR, 1, " DST PIO disable failed.");
- goto error;
- }
- if (read_dst(state, &reply, GET_ACK) < 0) {
- dprintk(verbose, DST_CA_INFO, 1, " Read not successful, trying to recover");
- dst_error_recovery(state);
- goto error;
+ goto unlock;
}
+ if (read_dst(state, &reply, GET_ACK) < 0)
+ goto report_read_failure;
+
if (read) {
if (! dst_wait_dst_ready(state, LONG_DELAY)) {
dprintk(verbose, DST_CA_NOTICE, 1, " 8820 not ready");
- goto error;
- }
- if (read_dst(state, ca_string, 128) < 0) { /* Try to make this dynamic */
- dprintk(verbose, DST_CA_INFO, 1, " Read not successful, trying to recover");
- dst_error_recovery(state);
- goto error;
+ goto unlock;
}
+ /* Try to make this dynamic */
+ if (read_dst(state, ca_string, 128) < 0)
+ goto report_read_failure;
}
mutex_unlock(&state->dst_mutex);
return 0;

-error:
+report_read_failure:
+ dprintk(verbose, DST_CA_INFO, 1,
+ " Read not successful, trying to recover");
+error_recovery:
+ dst_error_recovery(state);
+unlock:
mutex_unlock(&state->dst_mutex);
return -EIO;
}
diff --git a/drivers/media/pci/cx88/cx88-input.c b/drivers/media/pci/cx88/cx88-input.c
index 4e9953e61a12..c972efcd6bb6 100644
--- a/drivers/media/pci/cx88/cx88-input.c
+++ b/drivers/media/pci/cx88/cx88-input.c
@@ -566,20 +566,17 @@ static int get_key_pvr2000(struct IR_i2c *ir, enum rc_proto *protocol,

/* poll IR chip */
flags = i2c_smbus_read_byte_data(ir->c, 0x10);
- if (flags < 0) {
- dprintk("read error\n");
- return 0;
- }
+ if (flags < 0)
+ goto report_read_failure;
+
/* key pressed ? */
if (0 == (flags & 0x80))
return 0;

/* read actual key code */
code = i2c_smbus_read_byte_data(ir->c, 0x00);
- if (code < 0) {
- dprintk("read error\n");
- return 0;
- }
+ if (code < 0)
+ goto report_read_failure;

dprintk("IR Key/Flags: (0x%02x/0x%02x)\n",
code & 0xff, flags & 0xff);
@@ -588,6 +585,10 @@ static int get_key_pvr2000(struct IR_i2c *ir, enum rc_proto *protocol,
*scancode = code & 0xff;
*toggle = 0;
return 1;
+
+report_read_failure:
+ dprintk("read error\n");
+ return 0;
}

void cx88_i2c_init_ir(struct cx88_core *core)
diff --git a/drivers/media/platform/omap3isp/ispvideo.c b/drivers/media/platform/omap3isp/ispvideo.c
index a751c89a3ea8..2ddcac736402 100644
--- a/drivers/media/platform/omap3isp/ispvideo.c
+++ b/drivers/media/platform/omap3isp/ispvideo.c
@@ -1315,14 +1315,12 @@ static int isp_video_open(struct file *file)
/* If this is the first user, initialise the pipeline. */
if (omap3isp_get(video->isp) == NULL) {
ret = -EBUSY;
- goto done;
+ goto delete_fh;
}

ret = v4l2_pipeline_pm_use(&video->video.entity, 1);
- if (ret < 0) {
- omap3isp_put(video->isp);
- goto done;
- }
+ if (ret < 0)
+ goto put_isp;

queue = &handle->queue;
queue->type = video->type;
@@ -1335,10 +1333,8 @@ static int isp_video_open(struct file *file)
queue->dev = video->isp->dev;

ret = vb2_queue_init(&handle->queue);
- if (ret < 0) {
- omap3isp_put(video->isp);
- goto done;
- }
+ if (ret < 0)
+ goto put_isp;

memset(&handle->format, 0, sizeof(handle->format));
handle->format.type = video->type;
@@ -1346,14 +1342,15 @@ static int isp_video_open(struct file *file)

handle->video = video;
file->private_data = &handle->vfh;
+ goto exit;

-done:
- if (ret < 0) {
- v4l2_fh_del(&handle->vfh);
- v4l2_fh_exit(&handle->vfh);
- kfree(handle);
- }
-
+put_isp:
+ omap3isp_put(video->isp);
+delete_fh:
+ v4l2_fh_del(&handle->vfh);
+ v4l2_fh_exit(&handle->vfh);
+ kfree(handle);
+exit:
return ret;
}

diff --git a/drivers/media/platform/qcom/camss-8x16/camss-csid.c b/drivers/media/platform/qcom/camss-8x16/camss-csid.c
index 64df82817de3..92d4dc6b4a66 100644
--- a/drivers/media/platform/qcom/camss-8x16/camss-csid.c
+++ b/drivers/media/platform/qcom/camss-8x16/camss-csid.c
@@ -328,16 +328,12 @@ static int csid_set_power(struct v4l2_subdev *sd, int on)
return ret;

ret = csid_set_clock_rates(csid);
- if (ret < 0) {
- regulator_disable(csid->vdda);
- return ret;
- }
+ if (ret < 0)
+ goto disable_regulator;

ret = camss_enable_clocks(csid->nclocks, csid->clock, dev);
- if (ret < 0) {
- regulator_disable(csid->vdda);
- return ret;
- }
+ if (ret < 0)
+ goto disable_regulator;

enable_irq(csid->irq);

@@ -345,8 +341,7 @@ static int csid_set_power(struct v4l2_subdev *sd, int on)
if (ret < 0) {
disable_irq(csid->irq);
camss_disable_clocks(csid->nclocks, csid->clock);
- regulator_disable(csid->vdda);
- return ret;
+ goto disable_regulator;
}

hw_version = readl_relaxed(csid->base + CAMSS_CSID_HW_VERSION);
@@ -357,6 +352,11 @@ static int csid_set_power(struct v4l2_subdev *sd, int on)
ret = regulator_disable(csid->vdda);
}

+ goto exit;
+
+disable_regulator:
+ regulator_disable(csid->vdda);
+exit:
return ret;
}

diff --git a/drivers/media/tuners/tuner-xc2028.c b/drivers/media/tuners/tuner-xc2028.c
index fca85e08ebd7..2199b04c0ba9 100644
--- a/drivers/media/tuners/tuner-xc2028.c
+++ b/drivers/media/tuners/tuner-xc2028.c
@@ -571,7 +571,7 @@ static int load_firmware(struct dvb_frontend *fe, unsigned int type,
/* Checks if there's enough bytes to read */
if (p + sizeof(size) > endp) {
tuner_err("Firmware chunk size is wrong\n");
- return -EINVAL;
+ goto e_inval;
}

size = le16_to_cpu(*(__le16 *) p);
@@ -583,28 +583,23 @@ static int load_firmware(struct dvb_frontend *fe, unsigned int type,
if (!size) {
/* Special callback command received */
rc = do_tuner_callback(fe, XC2028_TUNER_RESET, 0);
- if (rc < 0) {
- tuner_err("Error at RESET code %d\n",
- (*p) & 0x7f);
- return -EINVAL;
- }
+ if (rc < 0)
+ goto report_failure;
+
continue;
}
if (size >= 0xff00) {
switch (size) {
case 0xff00:
rc = do_tuner_callback(fe, XC2028_RESET_CLK, 0);
- if (rc < 0) {
- tuner_err("Error at RESET code %d\n",
- (*p) & 0x7f);
- return -EINVAL;
- }
+ if (rc < 0)
+ goto report_failure;
+
break;
default:
tuner_info("Invalid RESET code %d\n",
size & 0x7f);
- return -EINVAL;
-
+ goto e_inval;
}
continue;
}
@@ -618,7 +613,7 @@ static int load_firmware(struct dvb_frontend *fe, unsigned int type,
if ((size + p > endp)) {
tuner_err("missing bytes: need %d, have %d\n",
size, (int)(endp - p));
- return -EINVAL;
+ goto e_inval;
}

buf[0] = *p;
@@ -635,7 +630,7 @@ static int load_firmware(struct dvb_frontend *fe, unsigned int type,
rc = i2c_send(priv, buf, len + 1);
if (rc < 0) {
tuner_err("%d returned from send\n", rc);
- return -EINVAL;
+ goto e_inval;
}

p += len;
@@ -650,6 +645,11 @@ static int load_firmware(struct dvb_frontend *fe, unsigned int type,
}
}
return 0;
+
+report_failure:
+ tuner_err("Error at RESET code %d\n", (*p) & 0x7f);
+e_inval:
+ return -EINVAL;
}

static int load_scode(struct dvb_frontend *fe, unsigned int type,
diff --git a/drivers/media/usb/cpia2/cpia2_usb.c b/drivers/media/usb/cpia2/cpia2_usb.c
index f3a1e5b1e57c..c6eaecbac831 100644
--- a/drivers/media/usb/cpia2/cpia2_usb.c
+++ b/drivers/media/usb/cpia2/cpia2_usb.c
@@ -848,15 +848,13 @@ static int cpia2_usb_probe(struct usb_interface *intf,
ret = set_alternate(cam, USBIF_CMDONLY);
if (ret < 0) {
ERR("%s: usb_set_interface error (ret = %d)\n", __func__, ret);
- kfree(cam);
- return ret;
+ goto free_data;
}


if((ret = cpia2_init_camera(cam)) < 0) {
ERR("%s: failed to initialize cpia2 camera (ret = %d)\n", __func__, ret);
- kfree(cam);
- return ret;
+ goto free_data;
}
LOG(" CPiA Version: %d.%02d (%d.%d)\n",
cam->params.version.firmware_revision_hi,
@@ -876,11 +874,14 @@ static int cpia2_usb_probe(struct usb_interface *intf,
ret = cpia2_register_camera(cam);
if (ret < 0) {
ERR("%s: Failed to register cpia2 camera (ret = %d)\n", __func__, ret);
- kfree(cam);
- return ret;
+ goto free_data;
}

return 0;
+
+free_data:
+ kfree(cam);
+ return ret;
}

/******************************************************************************
diff --git a/drivers/media/usb/gspca/gspca.c b/drivers/media/usb/gspca/gspca.c
index d29773b8f696..7ca44e109a69 100644
--- a/drivers/media/usb/gspca/gspca.c
+++ b/drivers/media/usb/gspca/gspca.c
@@ -907,10 +907,8 @@ static int gspca_init_transfer(struct gspca_dev *gspca_dev)
ret = create_urbs(gspca_dev,
alt_xfer(&intf->altsetting[alt], xfer,
gspca_dev->xfer_ep));
- if (ret < 0) {
- destroy_urbs(gspca_dev);
- goto out;
- }
+ if (ret < 0)
+ goto destroy_urbs;
}

/* clear the bulk endpoint */
@@ -920,10 +918,9 @@ static int gspca_init_transfer(struct gspca_dev *gspca_dev)

/* start the cam */
ret = gspca_dev->sd_desc->start(gspca_dev);
- if (ret < 0) {
- destroy_urbs(gspca_dev);
- goto out;
- }
+ if (ret < 0)
+ goto destroy_urbs;
+
gspca_dev->streaming = 1;
v4l2_ctrl_handler_setup(gspca_dev->vdev.ctrl_handler);

@@ -974,6 +971,10 @@ static int gspca_init_transfer(struct gspca_dev *gspca_dev)
out:
gspca_input_create_urb(gspca_dev);
return ret;
+
+destroy_urbs:
+ destroy_urbs(gspca_dev);
+ goto out;
}

static void gspca_set_default_mode(struct gspca_dev *gspca_dev)
diff --git a/drivers/media/usb/gspca/sn9c20x.c b/drivers/media/usb/gspca/sn9c20x.c
index cfa2a04d9f3f..06ec3a3253e1 100644
--- a/drivers/media/usb/gspca/sn9c20x.c
+++ b/drivers/media/usb/gspca/sn9c20x.c
@@ -1788,10 +1788,8 @@ static int sd_init(struct gspca_dev *gspca_dev)
for (i = 0; i < ARRAY_SIZE(bridge_init); i++) {
value = bridge_init[i][1];
reg_w(gspca_dev, bridge_init[i][0], &value, 1);
- if (gspca_dev->usb_err < 0) {
- pr_err("Device initialization failed\n");
- return gspca_dev->usb_err;
- }
+ if (gspca_dev->usb_err < 0)
+ goto report_failure;
}

if (sd->flags & LED_REVERSE)
@@ -1800,10 +1798,8 @@ static int sd_init(struct gspca_dev *gspca_dev)
reg_w1(gspca_dev, 0x1006, 0x20);

reg_w(gspca_dev, 0x10c0, i2c_init, 9);
- if (gspca_dev->usb_err < 0) {
- pr_err("Device initialization failed\n");
- return gspca_dev->usb_err;
- }
+ if (gspca_dev->usb_err < 0)
+ goto report_failure;

switch (sd->sensor) {
case SENSOR_OV9650:
@@ -1869,6 +1865,11 @@ static int sd_init(struct gspca_dev *gspca_dev)
pr_err("Unsupported sensor\n");
gspca_dev->usb_err = -ENODEV;
}
+ goto exit;
+
+report_failure:
+ pr_err("Device initialization failed\n");
+exit:
return gspca_dev->usb_err;
}

diff --git a/drivers/media/usb/pvrusb2/pvrusb2-ioread.c b/drivers/media/usb/pvrusb2/pvrusb2-ioread.c
index 602097bdcf14..0218614ce988 100644
--- a/drivers/media/usb/pvrusb2/pvrusb2-ioread.c
+++ b/drivers/media/usb/pvrusb2/pvrusb2-ioread.c
@@ -266,8 +266,7 @@ static int pvr2_ioread_get_buffer(struct pvr2_ioread *cp)
pvr2_trace(PVR2_TRACE_DATA_FLOW,
"/*---TRACE_READ---*/ pvr2_ioread_read id=%p queue_error=%d",
cp,stat);
- pvr2_ioread_stop(cp);
- return 0;
+ goto stop_read;
}
cp->c_buf = NULL;
cp->c_data_ptr = NULL;
@@ -286,9 +285,8 @@ static int pvr2_ioread_get_buffer(struct pvr2_ioread *cp)
pvr2_trace(PVR2_TRACE_DATA_FLOW,
"/*---TRACE_READ---*/ pvr2_ioread_read id=%p buffer_error=%d",
cp,stat);
- pvr2_ioread_stop(cp);
// Give up.
- return 0;
+ goto stop_read;
}
// Start over...
continue;
@@ -298,6 +296,10 @@ static int pvr2_ioread_get_buffer(struct pvr2_ioread *cp)
pvr2_buffer_get_id(cp->c_buf)];
}
return !0;
+
+stop_read:
+ pvr2_ioread_stop(cp);
+ return 0;
}

static void pvr2_ioread_filter(struct pvr2_ioread *cp)
diff --git a/drivers/media/usb/tm6000/tm6000-cards.c b/drivers/media/usb/tm6000/tm6000-cards.c
index 4d5f4cc4887e..e5c376a6495a 100644
--- a/drivers/media/usb/tm6000/tm6000-cards.c
+++ b/drivers/media/usb/tm6000/tm6000-cards.c
@@ -861,15 +861,14 @@ int tm6000_cards_setup(struct tm6000_core *dev)
for (i = 0; i < 2; i++) {
rc = tm6000_set_reg(dev, REQ_03_SET_GET_MCU_PIN,
dev->gpio.tuner_reset, 0x00);
- if (rc < 0) {
- printk(KERN_ERR "Error %i doing tuner reset\n", rc);
- return rc;
- }
+ if (rc < 0)
+ goto report_failure;

msleep(10); /* Just to be conservative */
rc = tm6000_set_reg(dev, REQ_03_SET_GET_MCU_PIN,
dev->gpio.tuner_reset, 0x01);
if (rc < 0) {
+report_failure:
printk(KERN_ERR "Error %i doing tuner reset\n", rc);
return rc;
}
diff --git a/drivers/media/usb/tm6000/tm6000-dvb.c b/drivers/media/usb/tm6000/tm6000-dvb.c
index c811fc6cf48a..7cc5c5aa08c2 100644
--- a/drivers/media/usb/tm6000/tm6000-dvb.c
+++ b/drivers/media/usb/tm6000/tm6000-dvb.c
@@ -134,8 +134,8 @@ static int tm6000_start_stream(struct tm6000_core *dev)

dvb->bulk_urb->transfer_buffer = kzalloc(size, GFP_KERNEL);
if (!dvb->bulk_urb->transfer_buffer) {
- usb_free_urb(dvb->bulk_urb);
- return -ENOMEM;
+ ret = -ENOMEM;
+ goto free_urb;
}

usb_fill_bulk_urb(dvb->bulk_urb, dev->udev, pipe,
@@ -160,11 +160,14 @@ static int tm6000_start_stream(struct tm6000_core *dev)
ret);

kfree(dvb->bulk_urb->transfer_buffer);
- usb_free_urb(dvb->bulk_urb);
- return ret;
+ goto free_urb;
}

return 0;
+
+free_urb:
+ usb_free_urb(dvb->bulk_urb);
+ return ret;
}

static void tm6000_stop_stream(struct tm6000_core *dev)
diff --git a/drivers/media/usb/tm6000/tm6000-video.c b/drivers/media/usb/tm6000/tm6000-video.c
index 8314d3fa9241..7c1d5e259ea3 100644
--- a/drivers/media/usb/tm6000/tm6000-video.c
+++ b/drivers/media/usb/tm6000/tm6000-video.c
@@ -589,10 +589,8 @@ static int tm6000_prepare_isoc(struct tm6000_core *dev)

dev->isoc_ctl.transfer_buffer = kmalloc(sizeof(void *)*num_bufs,
GFP_KERNEL);
- if (!dev->isoc_ctl.transfer_buffer) {
- kfree(dev->isoc_ctl.urb);
- return -ENOMEM;
- }
+ if (!dev->isoc_ctl.transfer_buffer)
+ goto free_urb;

dprintk(dev, V4L2_DEBUG_QUEUE, "Allocating %d x %d packets (%d bytes) of %d bytes each to handle %u size\n",
max_packets, num_bufs, sb_size,
@@ -604,9 +602,8 @@ static int tm6000_prepare_isoc(struct tm6000_core *dev)

/* call free, as some buffers might have been allocated */
tm6000_free_urb_buffers(dev);
- kfree(dev->isoc_ctl.urb);
kfree(dev->isoc_ctl.transfer_buffer);
- return -ENOMEM;
+ goto free_urb;
}

/* allocate urbs and transfer buffers */
@@ -636,6 +633,10 @@ static int tm6000_prepare_isoc(struct tm6000_core *dev)
}

return 0;
+
+free_urb:
+ kfree(dev->isoc_ctl.urb);
+ return -ENOMEM;
}

static int tm6000_start_thread(struct tm6000_core *dev)
diff --git a/drivers/media/usb/ttusb-budget/dvb-ttusb-budget.c b/drivers/media/usb/ttusb-budget/dvb-ttusb-budget.c
index eed56895c2b9..b093a843644b 100644
--- a/drivers/media/usb/ttusb-budget/dvb-ttusb-budget.c
+++ b/drivers/media/usb/ttusb-budget/dvb-ttusb-budget.c
@@ -1665,8 +1665,7 @@ static int ttusb_probe(struct usb_interface *intf, const struct usb_device_id *i
if (result < 0) {
dprintk("%s: ttusb_alloc_iso_urbs - failed\n", __func__);
mutex_unlock(&ttusb->semi2c);
- kfree(ttusb);
- return result;
+ goto err_free_usb;
}

if (ttusb_init_controller(ttusb))
@@ -1677,11 +1676,9 @@ static int ttusb_probe(struct usb_interface *intf, const struct usb_device_id *i
result = dvb_register_adapter(&ttusb->adapter,
"Technotrend/Hauppauge Nova-USB",
THIS_MODULE, &udev->dev, adapter_nr);
- if (result < 0) {
- ttusb_free_iso_urbs(ttusb);
- kfree(ttusb);
- return result;
- }
+ if (result < 0)
+ goto err_free_iso_urbs;
+
ttusb->adapter.priv = ttusb;

/* i2c */
@@ -1752,7 +1749,9 @@ static int ttusb_probe(struct usb_interface *intf, const struct usb_device_id *i
i2c_del_adapter(&ttusb->i2c_adap);
err_unregister_adapter:
dvb_unregister_adapter (&ttusb->adapter);
+err_free_iso_urbs:
ttusb_free_iso_urbs(ttusb);
+err_free_usb:
kfree(ttusb);
return result;
}
diff --git a/drivers/media/usb/ttusb-dec/ttusb_dec.c b/drivers/media/usb/ttusb-dec/ttusb_dec.c
index a8900f5571f7..99095b025859 100644
--- a/drivers/media/usb/ttusb-dec/ttusb_dec.c
+++ b/drivers/media/usb/ttusb-dec/ttusb_dec.c
@@ -1498,10 +1498,7 @@ static int ttusb_dec_init_dvb(struct ttusb_dec *dec)
if ((result = dvb_dmx_init(&dec->demux)) < 0) {
printk("%s: dvb_dmx_init failed: error %d\n", __func__,
result);
-
- dvb_unregister_adapter(&dec->adapter);
-
- return result;
+ goto unregister_adapter;
}

dec->dmxdev.filternum = 32;
@@ -1511,43 +1508,33 @@ static int ttusb_dec_init_dvb(struct ttusb_dec *dec)
if ((result = dvb_dmxdev_init(&dec->dmxdev, &dec->adapter)) < 0) {
printk("%s: dvb_dmxdev_init failed: error %d\n",
__func__, result);
-
- dvb_dmx_release(&dec->demux);
- dvb_unregister_adapter(&dec->adapter);
-
- return result;
+ goto release_demux;
}

dec->frontend.source = DMX_FRONTEND_0;

- if ((result = dec->demux.dmx.add_frontend(&dec->demux.dmx,
- &dec->frontend)) < 0) {
- printk("%s: dvb_dmx_init failed: error %d\n", __func__,
- result);
-
- dvb_dmxdev_release(&dec->dmxdev);
- dvb_dmx_release(&dec->demux);
- dvb_unregister_adapter(&dec->adapter);
-
- return result;
- }
+ result = dec->demux.dmx.add_frontend(&dec->demux.dmx, &dec->frontend);
+ if (result < 0)
+ goto report_failure;

if ((result = dec->demux.dmx.connect_frontend(&dec->demux.dmx,
&dec->frontend)) < 0) {
- printk("%s: dvb_dmx_init failed: error %d\n", __func__,
- result);
-
dec->demux.dmx.remove_frontend(&dec->demux.dmx, &dec->frontend);
- dvb_dmxdev_release(&dec->dmxdev);
- dvb_dmx_release(&dec->demux);
- dvb_unregister_adapter(&dec->adapter);
-
- return result;
+ goto report_failure;
}

dvb_net_init(&dec->adapter, &dec->dvb_net, &dec->demux.dmx);

return 0;
+
+report_failure:
+ printk("%s: dvb_dmx_init failed: error %d\n", __func__, result);
+ dvb_dmxdev_release(&dec->dmxdev);
+release_demux:
+ dvb_dmx_release(&dec->demux);
+unregister_adapter:
+ dvb_unregister_adapter(&dec->adapter);
+ return result;
}

static void ttusb_dec_exit_dvb(struct ttusb_dec *dec)
diff --git a/drivers/media/usb/uvc/uvc_v4l2.c b/drivers/media/usb/uvc/uvc_v4l2.c
index a13ad4e178be..f64c851adea2 100644
--- a/drivers/media/usb/uvc/uvc_v4l2.c
+++ b/drivers/media/usb/uvc/uvc_v4l2.c
@@ -994,10 +994,8 @@ static int uvc_ioctl_g_ext_ctrls(struct file *file, void *fh,
struct v4l2_queryctrl qc = { .id = ctrl->id };

ret = uvc_query_v4l2_ctrl(chain, &qc);
- if (ret < 0) {
- ctrls->error_idx = i;
- return ret;
- }
+ if (ret < 0)
+ goto set_index;

ctrl->value = qc.default_value;
}
@@ -1013,14 +1011,17 @@ static int uvc_ioctl_g_ext_ctrls(struct file *file, void *fh,
ret = uvc_ctrl_get(chain, ctrl);
if (ret < 0) {
uvc_ctrl_rollback(handle);
- ctrls->error_idx = i;
- return ret;
+ goto set_index;
}
}

ctrls->error_idx = 0;

return uvc_ctrl_rollback(handle);
+
+set_index:
+ ctrls->error_idx = i;
+ return ret;
}

static int uvc_ioctl_s_try_ext_ctrls(struct uvc_fh *handle,
--
2.16.1