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author | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2018-04-04 16:11:49 -0700 |
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committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2018-04-04 16:11:49 -0700 |
commit | 664b0bae0b87f69bc9deb098f5e0158b9cf18e04 (patch) | |
tree | d5841492b396ff483723b9339c7c11dc33b67688 /drivers/input/touchscreen/usbtouchscreen.c | |
parent | 567b9b549cfa1cbc202762ae97b5385c29ade1e3 (diff) | |
parent | 04bb1719c4de94700056241d4c0fe3c1413f5aff (diff) |
Merge branch 'next' into for-linus
Prepare input updates for 4.17 merge window.
Diffstat (limited to 'drivers/input/touchscreen/usbtouchscreen.c')
-rw-r--r-- | drivers/input/touchscreen/usbtouchscreen.c | 24 |
1 files changed, 16 insertions, 8 deletions
diff --git a/drivers/input/touchscreen/usbtouchscreen.c b/drivers/input/touchscreen/usbtouchscreen.c index aa77d243b786..c6cf90868503 100644 --- a/drivers/input/touchscreen/usbtouchscreen.c +++ b/drivers/input/touchscreen/usbtouchscreen.c @@ -54,6 +54,7 @@ #include <linux/usb.h> #include <linux/usb/input.h> #include <linux/hid.h> +#include <linux/mutex.h> static bool swap_xy; module_param(swap_xy, bool, 0644); @@ -107,6 +108,8 @@ struct usbtouch_usb { struct usb_interface *interface; struct input_dev *input; struct usbtouch_device_info *type; + struct mutex pm_mutex; /* serialize access to open/suspend */ + bool is_open; char name[128]; char phys[64]; void *priv; @@ -1450,6 +1453,7 @@ static int usbtouch_open(struct input_dev *input) if (r < 0) goto out; + mutex_lock(&usbtouch->pm_mutex); if (!usbtouch->type->irq_always) { if (usb_submit_urb(usbtouch->irq, GFP_KERNEL)) { r = -EIO; @@ -1458,7 +1462,9 @@ static int usbtouch_open(struct input_dev *input) } usbtouch->interface->needs_remote_wakeup = 1; + usbtouch->is_open = true; out_put: + mutex_unlock(&usbtouch->pm_mutex); usb_autopm_put_interface(usbtouch->interface); out: return r; @@ -1469,8 +1475,12 @@ static void usbtouch_close(struct input_dev *input) struct usbtouch_usb *usbtouch = input_get_drvdata(input); int r; + mutex_lock(&usbtouch->pm_mutex); if (!usbtouch->type->irq_always) usb_kill_urb(usbtouch->irq); + usbtouch->is_open = false; + mutex_unlock(&usbtouch->pm_mutex); + r = usb_autopm_get_interface(usbtouch->interface); usbtouch->interface->needs_remote_wakeup = 0; if (!r) @@ -1490,13 +1500,12 @@ static int usbtouch_suspend static int usbtouch_resume(struct usb_interface *intf) { struct usbtouch_usb *usbtouch = usb_get_intfdata(intf); - struct input_dev *input = usbtouch->input; int result = 0; - mutex_lock(&input->mutex); - if (input->users || usbtouch->type->irq_always) + mutex_lock(&usbtouch->pm_mutex); + if (usbtouch->is_open || usbtouch->type->irq_always) result = usb_submit_urb(usbtouch->irq, GFP_NOIO); - mutex_unlock(&input->mutex); + mutex_unlock(&usbtouch->pm_mutex); return result; } @@ -1504,7 +1513,6 @@ static int usbtouch_resume(struct usb_interface *intf) static int usbtouch_reset_resume(struct usb_interface *intf) { struct usbtouch_usb *usbtouch = usb_get_intfdata(intf); - struct input_dev *input = usbtouch->input; int err = 0; /* reinit the device */ @@ -1519,10 +1527,10 @@ static int usbtouch_reset_resume(struct usb_interface *intf) } /* restart IO if needed */ - mutex_lock(&input->mutex); - if (input->users) + mutex_lock(&usbtouch->pm_mutex); + if (usbtouch->is_open) err = usb_submit_urb(usbtouch->irq, GFP_NOIO); - mutex_unlock(&input->mutex); + mutex_unlock(&usbtouch->pm_mutex); return err; } |