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authorAlexey Klimov <klimov.linux@gmail.com>2008-12-27 22:30:29 -0300
committerMauro Carvalho Chehab <mchehab@redhat.com>2008-12-30 09:40:11 -0200
commit417b7953668574ff38d3f2dc76e9fe669f121469 (patch)
tree611f484e14984857ae4568c118fdd6cbe9534531 /drivers/media/radio/dsbr100.c
parent290588e067b6710b614da4bd538197dd88158b62 (diff)
downloadlinux-linaro-stable-417b7953668574ff38d3f2dc76e9fe669f121469.tar.gz
V4L/DVB (10058): dsbr100: fix codingstyle, add dev_err messages
We should make if-constructions more clear. Introduce int retval variables in some functions to make it this way. Also a lot of useful dev_err messages added. And now we check every returned value after usb_control_msg. Signed-off-by: Alexey Klimov <klimov.linux@gmail.com> Signed-off-by: Douglas Schilling Landgraf <dougsland@redhat.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/radio/dsbr100.c')
-rw-r--r--drivers/media/radio/dsbr100.c184
1 files changed, 137 insertions, 47 deletions
diff --git a/drivers/media/radio/dsbr100.c b/drivers/media/radio/dsbr100.c
index e1cc369bdbd6..e0d7485226cd 100644
--- a/drivers/media/radio/dsbr100.c
+++ b/drivers/media/radio/dsbr100.c
@@ -197,86 +197,169 @@ static struct usb_driver usb_dsbr100_driver = {
/* switch on radio */
static int dsbr100_start(struct dsbr100_device *radio)
{
+ int retval;
+ int request;
+
mutex_lock(&radio->lock);
- if (usb_control_msg(radio->usbdev, usb_rcvctrlpipe(radio->usbdev, 0),
- USB_REQ_GET_STATUS,
- USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
- 0x00, 0xC7, radio->transfer_buffer, 8, 300) < 0 ||
- usb_control_msg(radio->usbdev, usb_rcvctrlpipe(radio->usbdev, 0),
- DSB100_ONOFF,
- USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
- 0x01, 0x00, radio->transfer_buffer, 8, 300) < 0) {
- mutex_unlock(&radio->lock);
- return -1;
+
+ retval = usb_control_msg(radio->usbdev,
+ usb_rcvctrlpipe(radio->usbdev, 0),
+ USB_REQ_GET_STATUS,
+ USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
+ 0x00, 0xC7, radio->transfer_buffer, 8, 300);
+
+ if (retval < 0) {
+ request = USB_REQ_GET_STATUS;
+ goto usb_control_msg_failed;
}
- radio->muted=0;
+ retval = usb_control_msg(radio->usbdev,
+ usb_rcvctrlpipe(radio->usbdev, 0),
+ DSB100_ONOFF,
+ USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
+ 0x01, 0x00, radio->transfer_buffer, 8, 300);
+
+ if (retval < 0) {
+ request = DSB100_ONOFF;
+ goto usb_control_msg_failed;
+ }
+
+ radio->muted = 0;
mutex_unlock(&radio->lock);
return (radio->transfer_buffer)[0];
+
+usb_control_msg_failed:
+ mutex_unlock(&radio->lock);
+ dev_err(&radio->usbdev->dev,
+ "%s - usb_control_msg returned %i, request %i\n",
+ __func__, retval, request);
+ return -1;
+
}
/* switch off radio */
static int dsbr100_stop(struct dsbr100_device *radio)
{
+ int retval;
+ int request;
+
mutex_lock(&radio->lock);
- if (usb_control_msg(radio->usbdev, usb_rcvctrlpipe(radio->usbdev, 0),
- USB_REQ_GET_STATUS,
- USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
- 0x16, 0x1C, radio->transfer_buffer, 8, 300) < 0 ||
- usb_control_msg(radio->usbdev, usb_rcvctrlpipe(radio->usbdev, 0),
- DSB100_ONOFF,
- USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
- 0x00, 0x00, radio->transfer_buffer, 8, 300) < 0) {
- mutex_unlock(&radio->lock);
- return -1;
+
+ retval = usb_control_msg(radio->usbdev,
+ usb_rcvctrlpipe(radio->usbdev, 0),
+ USB_REQ_GET_STATUS,
+ USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
+ 0x16, 0x1C, radio->transfer_buffer, 8, 300);
+
+ if (retval < 0) {
+ request = USB_REQ_GET_STATUS;
+ goto usb_control_msg_failed;
+ }
+
+ retval = usb_control_msg(radio->usbdev,
+ usb_rcvctrlpipe(radio->usbdev, 0),
+ DSB100_ONOFF,
+ USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
+ 0x00, 0x00, radio->transfer_buffer, 8, 300);
+
+ if (retval < 0) {
+ request = DSB100_ONOFF;
+ goto usb_control_msg_failed;
}
- radio->muted=1;
+ radio->muted = 1;
mutex_unlock(&radio->lock);
return (radio->transfer_buffer)[0];
+
+usb_control_msg_failed:
+ mutex_unlock(&radio->lock);
+ dev_err(&radio->usbdev->dev,
+ "%s - usb_control_msg returned %i, request %i\n",
+ __func__, retval, request);
+ return -1;
+
}
/* set a frequency, freq is defined by v4l's TUNER_LOW, i.e. 1/16th kHz */
static int dsbr100_setfreq(struct dsbr100_device *radio, int freq)
{
+ int retval;
+ int request;
+
freq = (freq / 16 * 80) / 1000 + 856;
mutex_lock(&radio->lock);
- if (usb_control_msg(radio->usbdev, usb_rcvctrlpipe(radio->usbdev, 0),
- DSB100_TUNE,
- USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
- (freq >> 8) & 0x00ff, freq & 0xff,
- radio->transfer_buffer, 8, 300) < 0 ||
- usb_control_msg(radio->usbdev, usb_rcvctrlpipe(radio->usbdev, 0),
- USB_REQ_GET_STATUS,
- USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
- 0x96, 0xB7, radio->transfer_buffer, 8, 300) < 0 ||
- usb_control_msg(radio->usbdev, usb_rcvctrlpipe(radio->usbdev, 0),
- USB_REQ_GET_STATUS,
- USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
- 0x00, 0x24, radio->transfer_buffer, 8, 300) < 0) {
- radio->stereo = -1;
- mutex_unlock(&radio->lock);
- return -1;
+
+ retval = usb_control_msg(radio->usbdev,
+ usb_rcvctrlpipe(radio->usbdev, 0),
+ DSB100_TUNE,
+ USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
+ (freq >> 8) & 0x00ff, freq & 0xff,
+ radio->transfer_buffer, 8, 300);
+
+ if (retval < 0) {
+ request = DSB100_TUNE;
+ goto usb_control_msg_failed;
+ }
+
+ retval = usb_control_msg(radio->usbdev,
+ usb_rcvctrlpipe(radio->usbdev, 0),
+ USB_REQ_GET_STATUS,
+ USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
+ 0x96, 0xB7, radio->transfer_buffer, 8, 300);
+
+ if (retval < 0) {
+ request = USB_REQ_GET_STATUS;
+ goto usb_control_msg_failed;
+ }
+
+ retval = usb_control_msg(radio->usbdev,
+ usb_rcvctrlpipe(radio->usbdev, 0),
+ USB_REQ_GET_STATUS,
+ USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
+ 0x00, 0x24, radio->transfer_buffer, 8, 300);
+
+ if (retval < 0) {
+ request = USB_REQ_GET_STATUS;
+ goto usb_control_msg_failed;
}
radio->stereo = !((radio->transfer_buffer)[0] & 0x01);
mutex_unlock(&radio->lock);
return (radio->transfer_buffer)[0];
+
+usb_control_msg_failed:
+ radio->stereo = -1;
+ mutex_unlock(&radio->lock);
+ dev_err(&radio->usbdev->dev,
+ "%s - usb_control_msg returned %i, request %i\n",
+ __func__, retval, request);
+ return -1;
}
/* return the device status. This is, in effect, just whether it
sees a stereo signal or not. Pity. */
static void dsbr100_getstat(struct dsbr100_device *radio)
{
+ int retval;
+
mutex_lock(&radio->lock);
- if (usb_control_msg(radio->usbdev, usb_rcvctrlpipe(radio->usbdev, 0),
+
+ retval = usb_control_msg(radio->usbdev,
+ usb_rcvctrlpipe(radio->usbdev, 0),
USB_REQ_GET_STATUS,
USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
- 0x00 , 0x24, radio->transfer_buffer, 8, 300) < 0)
+ 0x00 , 0x24, radio->transfer_buffer, 8, 300);
+
+ if (retval < 0) {
radio->stereo = -1;
- else
+ dev_err(&radio->usbdev->dev,
+ "%s - usb_control_msg returned %i, request %i\n",
+ __func__, retval, USB_REQ_GET_STATUS);
+ } else {
radio->stereo = !(radio->transfer_buffer[0] & 0x01);
+ }
+
mutex_unlock(&radio->lock);
}
@@ -358,13 +441,15 @@ static int vidioc_s_frequency(struct file *file, void *priv,
struct v4l2_frequency *f)
{
struct dsbr100_device *radio = video_drvdata(file);
+ int retval;
/* safety check */
if (radio->removed)
return -EIO;
radio->curfreq = f->frequency;
- if (dsbr100_setfreq(radio, radio->curfreq) == -1)
+ retval = dsbr100_setfreq(radio, radio->curfreq);
+ if (retval == -1)
dev_warn(&radio->usbdev->dev, "Set frequency failed\n");
return 0;
}
@@ -418,6 +503,7 @@ static int vidioc_s_ctrl(struct file *file, void *priv,
struct v4l2_control *ctrl)
{
struct dsbr100_device *radio = video_drvdata(file);
+ int retval;
/* safety check */
if (radio->removed)
@@ -426,13 +512,15 @@ static int vidioc_s_ctrl(struct file *file, void *priv,
switch (ctrl->id) {
case V4L2_CID_AUDIO_MUTE:
if (ctrl->value) {
- if (dsbr100_stop(radio) == -1) {
+ retval = dsbr100_stop(radio);
+ if (retval == -1) {
dev_warn(&radio->usbdev->dev,
"Radio did not respond properly\n");
return -EBUSY;
}
} else {
- if (dsbr100_start(radio) == -1) {
+ retval = dsbr100_start(radio);
+ if (retval == -1) {
dev_warn(&radio->usbdev->dev,
"Radio did not respond properly\n");
return -EBUSY;
@@ -484,7 +572,8 @@ static int usb_dsbr100_open(struct inode *inode, struct file *file)
radio->users = 1;
radio->muted = 1;
- if (dsbr100_start(radio) < 0) {
+ retval = dsbr100_start(radio);
+ if (retval < 0) {
dev_warn(&radio->usbdev->dev,
"Radio did not start up properly\n");
radio->users = 0;
@@ -493,7 +582,6 @@ static int usb_dsbr100_open(struct inode *inode, struct file *file)
}
retval = dsbr100_setfreq(radio, radio->curfreq);
-
if (retval == -1)
dev_warn(&radio->usbdev->dev,
"set frequency failed\n");
@@ -601,6 +689,7 @@ static int usb_dsbr100_probe(struct usb_interface *intf,
const struct usb_device_id *id)
{
struct dsbr100_device *radio;
+ int retval;
radio = kmalloc(sizeof(struct dsbr100_device), GFP_KERNEL);
@@ -622,7 +711,8 @@ static int usb_dsbr100_probe(struct usb_interface *intf,
radio->usbdev = interface_to_usbdev(intf);
radio->curfreq = FREQ_MIN * FREQ_MUL;
video_set_drvdata(&radio->videodev, radio);
- if (video_register_device(&radio->videodev, VFL_TYPE_RADIO, radio_nr) < 0) {
+ retval = video_register_device(&radio->videodev, VFL_TYPE_RADIO, radio_nr);
+ if (retval < 0) {
dev_warn(&intf->dev, "Could not register video device\n");
kfree(radio->transfer_buffer);
kfree(radio);