diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/bluetooth/hci_bcm.c | 91 |
1 files changed, 75 insertions, 16 deletions
diff --git a/drivers/bluetooth/hci_bcm.c b/drivers/bluetooth/hci_bcm.c index 8741e302e6fd..03a365148184 100644 --- a/drivers/bluetooth/hci_bcm.c +++ b/drivers/bluetooth/hci_bcm.c @@ -197,11 +197,21 @@ static bool bcm_device_exists(struct bcm_device *device) static int bcm_gpio_set_power(struct bcm_device *dev, bool powered) { - if (powered && !IS_ERR(dev->clk) && !dev->clk_enabled) - clk_prepare_enable(dev->clk); + int err; - dev->set_shutdown(dev, powered); - dev->set_device_wakeup(dev, powered); + if (powered && !IS_ERR(dev->clk) && !dev->clk_enabled) { + err = clk_prepare_enable(dev->clk); + if (err) + return err; + } + + err = dev->set_shutdown(dev, powered); + if (err) + goto err_clk_disable; + + err = dev->set_device_wakeup(dev, powered); + if (err) + goto err_revert_shutdown; if (!powered && !IS_ERR(dev->clk) && dev->clk_enabled) clk_disable_unprepare(dev->clk); @@ -209,6 +219,13 @@ static int bcm_gpio_set_power(struct bcm_device *dev, bool powered) dev->clk_enabled = powered; return 0; + +err_revert_shutdown: + dev->set_shutdown(dev, !powered); +err_clk_disable: + if (powered && !IS_ERR(dev->clk) && !dev->clk_enabled) + clk_disable_unprepare(dev->clk); + return err; } #ifdef CONFIG_PM @@ -331,6 +348,7 @@ static int bcm_open(struct hci_uart *hu) { struct bcm_data *bcm; struct list_head *p; + int err; bt_dev_dbg(hu->hdev, "hu %p", hu); @@ -345,7 +363,10 @@ static int bcm_open(struct hci_uart *hu) mutex_lock(&bcm_device_lock); if (hu->serdev) { - serdev_device_open(hu->serdev); + err = serdev_device_open(hu->serdev); + if (err) + goto err_free; + bcm->dev = serdev_device_get_drvdata(hu->serdev); goto out; } @@ -373,17 +394,30 @@ out: if (bcm->dev) { hu->init_speed = bcm->dev->init_speed; hu->oper_speed = bcm->dev->oper_speed; - bcm_gpio_set_power(bcm->dev, true); + err = bcm_gpio_set_power(bcm->dev, true); + if (err) + goto err_unset_hu; } mutex_unlock(&bcm_device_lock); return 0; + +err_unset_hu: +#ifdef CONFIG_PM + bcm->dev->hu = NULL; +#endif +err_free: + mutex_unlock(&bcm_device_lock); + hu->priv = NULL; + kfree(bcm); + return err; } static int bcm_close(struct hci_uart *hu) { struct bcm_data *bcm = hu->priv; struct bcm_device *bdev = NULL; + int err; bt_dev_dbg(hu->hdev, "hu %p", hu); @@ -407,8 +441,11 @@ static int bcm_close(struct hci_uart *hu) pm_runtime_disable(bdev->dev); } - bcm_gpio_set_power(bdev, false); - pm_runtime_set_suspended(bdev->dev); + err = bcm_gpio_set_power(bdev, false); + if (err) + bt_dev_err(hu->hdev, "Failed to power down"); + else + pm_runtime_set_suspended(bdev->dev); } mutex_unlock(&bcm_device_lock); @@ -588,6 +625,7 @@ static struct sk_buff *bcm_dequeue(struct hci_uart *hu) static int bcm_suspend_device(struct device *dev) { struct bcm_device *bdev = dev_get_drvdata(dev); + int err; bt_dev_dbg(bdev, ""); @@ -599,7 +637,15 @@ static int bcm_suspend_device(struct device *dev) } /* Suspend the device */ - bdev->set_device_wakeup(bdev, false); + err = bdev->set_device_wakeup(bdev, false); + if (err) { + if (bdev->is_suspended && bdev->hu) { + bdev->is_suspended = false; + hci_uart_set_flow_control(bdev->hu, false); + } + return -EBUSY; + } + bt_dev_dbg(bdev, "suspend, delaying 15 ms"); mdelay(15); @@ -609,10 +655,16 @@ static int bcm_suspend_device(struct device *dev) static int bcm_resume_device(struct device *dev) { struct bcm_device *bdev = dev_get_drvdata(dev); + int err; bt_dev_dbg(bdev, ""); - bdev->set_device_wakeup(bdev, true); + err = bdev->set_device_wakeup(bdev, true); + if (err) { + dev_err(dev, "Failed to power up\n"); + return err; + } + bt_dev_dbg(bdev, "resume, delaying 15 ms"); mdelay(15); @@ -666,6 +718,7 @@ unlock: static int bcm_resume(struct device *dev) { struct bcm_device *bdev = dev_get_drvdata(dev); + int err = 0; bt_dev_dbg(bdev, "resume: is_suspended %d", bdev->is_suspended); @@ -685,14 +738,16 @@ static int bcm_resume(struct device *dev) bt_dev_dbg(bdev, "BCM irq: disabled"); } - bcm_resume_device(dev); + err = bcm_resume_device(dev); unlock: mutex_unlock(&bcm_device_lock); - pm_runtime_disable(dev); - pm_runtime_set_active(dev); - pm_runtime_enable(dev); + if (!err) { + pm_runtime_disable(dev); + pm_runtime_set_active(dev); + pm_runtime_enable(dev); + } return 0; } @@ -923,7 +978,9 @@ static int bcm_probe(struct platform_device *pdev) list_add_tail(&dev->list, &bcm_device_list); mutex_unlock(&bcm_device_lock); - bcm_gpio_set_power(dev, false); + ret = bcm_gpio_set_power(dev, false); + if (ret) + dev_err(&pdev->dev, "Failed to power down\n"); return 0; } @@ -1025,7 +1082,9 @@ static int bcm_serdev_probe(struct serdev_device *serdev) if (err) return err; - bcm_gpio_set_power(bcmdev, false); + err = bcm_gpio_set_power(bcmdev, false); + if (err) + dev_err(&serdev->dev, "Failed to power down\n"); return hci_uart_register_device(&bcmdev->serdev_hu, &bcm_proto); } |