Re: [PATCH v2] input: tablet: pegasus_notetaker: USB PM fixes
flat view
From: Dmitry Torokhov <hidden>
Date: 2016-06-23 17:18:41
Also in:
lkml
Subsystem:
input (keyboard, mouse, joystick, touchscreen) drivers, the rest · Maintainers:
Dmitry Torokhov, Linus Torvalds
Hi Martin, On Tue, Jun 14, 2016 at 01:20:15PM +0200, Martin Kepplinger wrote:
quoted hunk ↗ jump to hunk
static int pegasus_reset_resume(struct usb_interface *intf) { + struct pegasus *pegasus = usb_get_intfdata(intf); + + if (pegasus->dev->users) + pegasus_set_mode(pegasus, PEN_MODE_XY, NOTETAKER_LED_MOUSE); + return pegasus_resume(intf);
Hmm, we need to take input mutex when using pegasus->dev->users, how about the version below instead? Thanks. -- Dmitry Input: pegasus_notetake - USB PM fixes From: Martin Kepplinger <redacted> * Fix usb_autopm calls to be balanced * In reset_resume() we need to set the device mode * In suspend() we must cancel the workqueue's work Signed-off-by: Martin Kepplinger <redacted> Signed-off-by: Dmitry Torokhov <redacted> --- drivers/input/tablet/pegasus_notetaker.c | 46 ++++++++++++++++++++---------- 1 file changed, 31 insertions(+), 15 deletions(-)
diff --git a/drivers/input/tablet/pegasus_notetaker.c b/drivers/input/tablet/pegasus_notetaker.c
index 805afe3..d20ea06 100644
--- a/drivers/input/tablet/pegasus_notetaker.c
+++ b/drivers/input/tablet/pegasus_notetaker.c@@ -80,7 +80,7 @@ struct pegasus { struct work_struct init; }; -static void pegasus_control_msg(struct pegasus *pegasus, u8 *data, int len) +static int pegasus_control_msg(struct pegasus *pegasus, u8 *data, int len) { const int sizeof_buf = len + 2; int result;
@@ -88,7 +88,7 @@ static void pegasus_control_msg(struct pegasus *pegasus, u8 *data, int len) cmd_buf = kmalloc(sizeof_buf, GFP_KERNEL); if (!cmd_buf) - return; + return -ENOMEM; cmd_buf[0] = NOTETAKER_REPORT_ID; cmd_buf[1] = len;
@@ -101,17 +101,23 @@ static void pegasus_control_msg(struct pegasus *pegasus, u8 *data, int len) 0, 0, cmd_buf, sizeof_buf, USB_CTRL_SET_TIMEOUT); - if (result != sizeof_buf) - dev_err(&pegasus->usbdev->dev, "control msg error\n"); + if (result != sizeof_buf) { + if (result >= 0) + result = -EIO; + dev_err(&pegasus->usbdev->dev, "control msg error: %d\n", + result); + } kfree(cmd_buf); + + return result; } -static void pegasus_set_mode(struct pegasus *pegasus, u8 mode, u8 led) +static int pegasus_set_mode(struct pegasus *pegasus, u8 mode, u8 led) { u8 cmd[] = { NOTETAKER_SET_CMD, NOTETAKER_SET_MODE, led, mode }; - pegasus_control_msg(pegasus, cmd, sizeof(cmd)); + return pegasus_control_msg(pegasus, cmd, sizeof(cmd)); } static void pegasus_parse_packet(struct pegasus *pegasus)
@@ -205,27 +211,24 @@ static int pegasus_open(struct input_dev *dev) return retval; pegasus->irq->dev = pegasus->usbdev; - if (usb_submit_urb(pegasus->irq, GFP_KERNEL)) + if (usb_submit_urb(pegasus->irq, GFP_KERNEL)) { retval = -EIO; + goto out; + } - pegasus_set_mode(pegasus, PEN_MODE_XY, NOTETAKER_LED_MOUSE); + retval = pegasus_set_mode(pegasus, PEN_MODE_XY, NOTETAKER_LED_MOUSE); +out: usb_autopm_put_interface(pegasus->intf); - return retval; } static void pegasus_close(struct input_dev *dev) { struct pegasus *pegasus = input_get_drvdata(dev); - int autopm_error; - autopm_error = usb_autopm_get_interface(pegasus->intf); usb_kill_urb(pegasus->irq); cancel_work_sync(&pegasus->init); - - if (!autopm_error) - usb_autopm_put_interface(pegasus->intf); } static int pegasus_probe(struct usb_interface *intf,
@@ -373,6 +376,7 @@ static int pegasus_suspend(struct usb_interface *intf, pm_message_t message) mutex_lock(&pegasus->dev->mutex); usb_kill_urb(pegasus->irq); + cancel_work_sync(&pegasus->init); mutex_unlock(&pegasus->dev->mutex); return 0;
@@ -393,7 +397,19 @@ static int pegasus_resume(struct usb_interface *intf) static int pegasus_reset_resume(struct usb_interface *intf) { - return pegasus_resume(intf); + struct pegasus *pegasus = usb_get_intfdata(intf); + int retval = 0; + + mutex_lock(&pegasus->dev->mutex); + if (pegasus->dev->users) { + retval = pegasus_set_mode(pegasus, PEN_MODE_XY, + NOTETAKER_LED_MOUSE); + if (!retval && usb_submit_urb(pegasus->irq, GFP_NOIO) < 0) + retval = -EIO; + } + mutex_unlock(&pegasus->dev->mutex); + + return retval; } static const struct usb_device_id pegasus_ids[] = {