[media] au0828: Fix dev_state handling

The au0828 dev_state is actually a bit mask. It should not be
checking with "==" but, instead, with a logic and. There are some
places where it was doing it wrong.

Fix that by replacing the dev_state set/clear/test with the
bitops.

As reviewed by Shuah:
	"Looks good. Tested running bind/unbind au0828 loop for 1000 times.
	Didn't see any problems and the v4l2_querycap() problem has been
	fixed with this patch.

	After the above test, ran bind/unbind snd_usb_audio 1000 times.
	Didn't see any problems. Generated media graph and the graph
	looks good."

Cc: stable@vger.kernel.org
Reviewed-by: Shuah Khan <shuahkh@osg.samsung.com>
Tested-by: Shuah Khan <shuahkh@osg.samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
This commit is contained in:
Mauro Carvalho Chehab 2016-03-22 09:21:57 -03:00
parent ed940cd274
commit e8e3039f5b
4 changed files with 39 additions and 39 deletions

View File

@ -171,7 +171,7 @@ static void au0828_usb_disconnect(struct usb_interface *interface)
Set the status so poll routines can check and avoid
access after disconnect.
*/
dev->dev_state = DEV_DISCONNECTED;
set_bit(DEV_DISCONNECTED, &dev->dev_state);
au0828_rc_unregister(dev);
/* Digital TV */

View File

@ -130,7 +130,7 @@ static int au0828_get_key_au8522(struct au0828_rc *ir)
bool first = true;
/* do nothing if device is disconnected */
if (ir->dev->dev_state == DEV_DISCONNECTED)
if (test_bit(DEV_DISCONNECTED, &ir->dev->dev_state))
return 0;
/* Check IR int */
@ -260,7 +260,7 @@ static void au0828_rc_stop(struct rc_dev *rc)
cancel_delayed_work_sync(&ir->work);
/* do nothing if device is disconnected */
if (ir->dev->dev_state != DEV_DISCONNECTED) {
if (!test_bit(DEV_DISCONNECTED, &ir->dev->dev_state)) {
/* Disable IR */
au8522_rc_clear(ir, 0xe0, 1 << 4);
}

View File

@ -106,14 +106,13 @@ static inline void print_err_status(struct au0828_dev *dev,
static int check_dev(struct au0828_dev *dev)
{
if (dev->dev_state & DEV_DISCONNECTED) {
if (test_bit(DEV_DISCONNECTED, &dev->dev_state)) {
pr_info("v4l2 ioctl: device not present\n");
return -ENODEV;
}
if (dev->dev_state & DEV_MISCONFIGURED) {
pr_info("v4l2 ioctl: device is misconfigured; "
"close and open it again\n");
if (test_bit(DEV_MISCONFIGURED, &dev->dev_state)) {
pr_info("v4l2 ioctl: device is misconfigured; close and open it again\n");
return -EIO;
}
return 0;
@ -521,8 +520,8 @@ static inline int au0828_isoc_copy(struct au0828_dev *dev, struct urb *urb)
if (!dev)
return 0;
if ((dev->dev_state & DEV_DISCONNECTED) ||
(dev->dev_state & DEV_MISCONFIGURED))
if (test_bit(DEV_DISCONNECTED, &dev->dev_state) ||
test_bit(DEV_MISCONFIGURED, &dev->dev_state))
return 0;
if (urb->status < 0) {
@ -824,10 +823,10 @@ static int au0828_stream_interrupt(struct au0828_dev *dev)
int ret = 0;
dev->stream_state = STREAM_INTERRUPT;
if (dev->dev_state == DEV_DISCONNECTED)
if (test_bit(DEV_DISCONNECTED, &dev->dev_state))
return -ENODEV;
else if (ret) {
dev->dev_state = DEV_MISCONFIGURED;
set_bit(DEV_MISCONFIGURED, &dev->dev_state);
dprintk(1, "%s device is misconfigured!\n", __func__);
return ret;
}
@ -1026,7 +1025,7 @@ static int au0828_v4l2_open(struct file *filp)
int ret;
dprintk(1,
"%s called std_set %d dev_state %d stream users %d users %d\n",
"%s called std_set %d dev_state %ld stream users %d users %d\n",
__func__, dev->std_set_in_tuner_core, dev->dev_state,
dev->streaming_users, dev->users);
@ -1045,7 +1044,7 @@ static int au0828_v4l2_open(struct file *filp)
au0828_analog_stream_enable(dev);
au0828_analog_stream_reset(dev);
dev->stream_state = STREAM_OFF;
dev->dev_state |= DEV_INITIALIZED;
set_bit(DEV_INITIALIZED, &dev->dev_state);
}
dev->users++;
mutex_unlock(&dev->lock);
@ -1059,7 +1058,7 @@ static int au0828_v4l2_close(struct file *filp)
struct video_device *vdev = video_devdata(filp);
dprintk(1,
"%s called std_set %d dev_state %d stream users %d users %d\n",
"%s called std_set %d dev_state %ld stream users %d users %d\n",
__func__, dev->std_set_in_tuner_core, dev->dev_state,
dev->streaming_users, dev->users);
@ -1075,7 +1074,7 @@ static int au0828_v4l2_close(struct file *filp)
del_timer_sync(&dev->vbi_timeout);
}
if (dev->dev_state & DEV_DISCONNECTED)
if (test_bit(DEV_DISCONNECTED, &dev->dev_state))
goto end;
if (dev->users == 1) {
@ -1135,7 +1134,7 @@ static void au0828_init_tuner(struct au0828_dev *dev)
.type = V4L2_TUNER_ANALOG_TV,
};
dprintk(1, "%s called std_set %d dev_state %d\n", __func__,
dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
dev->std_set_in_tuner_core, dev->dev_state);
if (dev->std_set_in_tuner_core)
@ -1207,7 +1206,7 @@ static int vidioc_querycap(struct file *file, void *priv,
struct video_device *vdev = video_devdata(file);
struct au0828_dev *dev = video_drvdata(file);
dprintk(1, "%s called std_set %d dev_state %d\n", __func__,
dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
dev->std_set_in_tuner_core, dev->dev_state);
strlcpy(cap->driver, "au0828", sizeof(cap->driver));
@ -1250,7 +1249,7 @@ static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
{
struct au0828_dev *dev = video_drvdata(file);
dprintk(1, "%s called std_set %d dev_state %d\n", __func__,
dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
dev->std_set_in_tuner_core, dev->dev_state);
f->fmt.pix.width = dev->width;
@ -1269,7 +1268,7 @@ static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
{
struct au0828_dev *dev = video_drvdata(file);
dprintk(1, "%s called std_set %d dev_state %d\n", __func__,
dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
dev->std_set_in_tuner_core, dev->dev_state);
return au0828_set_format(dev, VIDIOC_TRY_FMT, f);
@ -1281,7 +1280,7 @@ static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
struct au0828_dev *dev = video_drvdata(file);
int rc;
dprintk(1, "%s called std_set %d dev_state %d\n", __func__,
dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
dev->std_set_in_tuner_core, dev->dev_state);
rc = check_dev(dev);
@ -1303,7 +1302,7 @@ static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id norm)
{
struct au0828_dev *dev = video_drvdata(file);
dprintk(1, "%s called std_set %d dev_state %d\n", __func__,
dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
dev->std_set_in_tuner_core, dev->dev_state);
if (norm == dev->std)
@ -1335,7 +1334,7 @@ static int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *norm)
{
struct au0828_dev *dev = video_drvdata(file);
dprintk(1, "%s called std_set %d dev_state %d\n", __func__,
dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
dev->std_set_in_tuner_core, dev->dev_state);
*norm = dev->std;
@ -1357,7 +1356,7 @@ static int vidioc_enum_input(struct file *file, void *priv,
[AU0828_VMUX_DVB] = "DVB",
};
dprintk(1, "%s called std_set %d dev_state %d\n", __func__,
dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
dev->std_set_in_tuner_core, dev->dev_state);
tmp = input->index;
@ -1387,7 +1386,7 @@ static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
{
struct au0828_dev *dev = video_drvdata(file);
dprintk(1, "%s called std_set %d dev_state %d\n", __func__,
dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
dev->std_set_in_tuner_core, dev->dev_state);
*i = dev->ctrl_input;
@ -1398,7 +1397,7 @@ static void au0828_s_input(struct au0828_dev *dev, int index)
{
int i;
dprintk(1, "%s called std_set %d dev_state %d\n", __func__,
dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
dev->std_set_in_tuner_core, dev->dev_state);
switch (AUVI_INPUT(index).type) {
@ -1496,7 +1495,7 @@ static int vidioc_g_audio(struct file *file, void *priv, struct v4l2_audio *a)
{
struct au0828_dev *dev = video_drvdata(file);
dprintk(1, "%s called std_set %d dev_state %d\n", __func__,
dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
dev->std_set_in_tuner_core, dev->dev_state);
a->index = dev->ctrl_ainput;
@ -1516,7 +1515,7 @@ static int vidioc_s_audio(struct file *file, void *priv, const struct v4l2_audio
if (a->index != dev->ctrl_ainput)
return -EINVAL;
dprintk(1, "%s called std_set %d dev_state %d\n", __func__,
dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
dev->std_set_in_tuner_core, dev->dev_state);
return 0;
}
@ -1534,7 +1533,7 @@ static int vidioc_g_tuner(struct file *file, void *priv, struct v4l2_tuner *t)
if (ret)
return ret;
dprintk(1, "%s called std_set %d dev_state %d\n", __func__,
dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
dev->std_set_in_tuner_core, dev->dev_state);
strcpy(t->name, "Auvitek tuner");
@ -1554,7 +1553,7 @@ static int vidioc_s_tuner(struct file *file, void *priv,
if (t->index != 0)
return -EINVAL;
dprintk(1, "%s called std_set %d dev_state %d\n", __func__,
dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
dev->std_set_in_tuner_core, dev->dev_state);
au0828_init_tuner(dev);
@ -1576,7 +1575,7 @@ static int vidioc_g_frequency(struct file *file, void *priv,
if (freq->tuner != 0)
return -EINVAL;
dprintk(1, "%s called std_set %d dev_state %d\n", __func__,
dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
dev->std_set_in_tuner_core, dev->dev_state);
freq->frequency = dev->ctrl_freq;
return 0;
@ -1591,7 +1590,7 @@ static int vidioc_s_frequency(struct file *file, void *priv,
if (freq->tuner != 0)
return -EINVAL;
dprintk(1, "%s called std_set %d dev_state %d\n", __func__,
dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
dev->std_set_in_tuner_core, dev->dev_state);
au0828_init_tuner(dev);
@ -1617,7 +1616,7 @@ static int vidioc_g_fmt_vbi_cap(struct file *file, void *priv,
{
struct au0828_dev *dev = video_drvdata(file);
dprintk(1, "%s called std_set %d dev_state %d\n", __func__,
dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
dev->std_set_in_tuner_core, dev->dev_state);
format->fmt.vbi.samples_per_line = dev->vbi_width;
@ -1643,7 +1642,7 @@ static int vidioc_cropcap(struct file *file, void *priv,
if (cc->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
return -EINVAL;
dprintk(1, "%s called std_set %d dev_state %d\n", __func__,
dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
dev->std_set_in_tuner_core, dev->dev_state);
cc->bounds.left = 0;
@ -1665,7 +1664,7 @@ static int vidioc_g_register(struct file *file, void *priv,
{
struct au0828_dev *dev = video_drvdata(file);
dprintk(1, "%s called std_set %d dev_state %d\n", __func__,
dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
dev->std_set_in_tuner_core, dev->dev_state);
reg->val = au0828_read(dev, reg->reg);
@ -1678,7 +1677,7 @@ static int vidioc_s_register(struct file *file, void *priv,
{
struct au0828_dev *dev = video_drvdata(file);
dprintk(1, "%s called std_set %d dev_state %d\n", __func__,
dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
dev->std_set_in_tuner_core, dev->dev_state);
return au0828_writereg(dev, reg->reg, reg->val);

View File

@ -21,6 +21,7 @@
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/bitops.h>
#include <linux/usb.h>
#include <linux/i2c.h>
#include <linux/i2c-algo-bit.h>
@ -121,9 +122,9 @@ enum au0828_stream_state {
/* device state */
enum au0828_dev_state {
DEV_INITIALIZED = 0x01,
DEV_DISCONNECTED = 0x02,
DEV_MISCONFIGURED = 0x04
DEV_INITIALIZED = 0,
DEV_DISCONNECTED = 1,
DEV_MISCONFIGURED = 2
};
struct au0828_dev;
@ -247,7 +248,7 @@ struct au0828_dev {
int input_type;
int std_set_in_tuner_core;
unsigned int ctrl_input;
enum au0828_dev_state dev_state;
long unsigned int dev_state; /* defined at enum au0828_dev_state */;
enum au0828_stream_state stream_state;
wait_queue_head_t open;