diff options
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/gnss/sirf.c | 32 |
1 files changed, 30 insertions, 2 deletions
diff --git a/drivers/gnss/sirf.c b/drivers/gnss/sirf.c index 59cde7e923b8..49bc021325e9 100644 --- a/drivers/gnss/sirf.c +++ b/drivers/gnss/sirf.c @@ -35,6 +35,10 @@ struct sirf_data { struct gpio_desc *wakeup; int irq; bool active; + + struct mutex gdev_mutex; + bool open; + wait_queue_head_t power_wait; }; @@ -44,9 +48,18 @@ static int sirf_open(struct gnss_device *gdev) struct serdev_device *serdev = data->serdev; int ret; + mutex_lock(&data->gdev_mutex); + data->open = true; + mutex_unlock(&data->gdev_mutex); + ret = serdev_device_open(serdev); - if (ret) + if (ret) { + mutex_lock(&data->gdev_mutex); + data->open = false; + mutex_unlock(&data->gdev_mutex); return ret; + } + serdev_device_set_baudrate(serdev, data->speed); serdev_device_set_flow_control(serdev, false); @@ -63,6 +76,10 @@ static int sirf_open(struct gnss_device *gdev) err_close: serdev_device_close(serdev); + mutex_lock(&data->gdev_mutex); + data->open = false; + mutex_unlock(&data->gdev_mutex); + return ret; } @@ -74,6 +91,10 @@ static void sirf_close(struct gnss_device *gdev) serdev_device_close(serdev); pm_runtime_put(&serdev->dev); + + mutex_lock(&data->gdev_mutex); + data->open = false; + mutex_unlock(&data->gdev_mutex); } static int sirf_write_raw(struct gnss_device *gdev, const unsigned char *buf, @@ -105,8 +126,14 @@ static int sirf_receive_buf(struct serdev_device *serdev, { struct sirf_data *data = serdev_device_get_drvdata(serdev); struct gnss_device *gdev = data->gdev; + int ret = 0; - return gnss_insert_raw(gdev, buf, count); + mutex_lock(&data->gdev_mutex); + if (data->open) + ret = gnss_insert_raw(gdev, buf, count); + mutex_unlock(&data->gdev_mutex); + + return ret; } static const struct serdev_device_ops sirf_serdev_ops = { @@ -275,6 +302,7 @@ static int sirf_probe(struct serdev_device *serdev) data->serdev = serdev; data->gdev = gdev; + mutex_init(&data->gdev_mutex); init_waitqueue_head(&data->power_wait); serdev_device_set_drvdata(serdev, data); |