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Input: pegasus_notetaker - handle usb control msg errors
Signed-off-by: Martin Kepplinger <martink@posteo.de> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This commit is contained in:
parent
3746e56752
commit
168c1398e0
1 changed files with 20 additions and 9 deletions
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@ -80,15 +80,16 @@ struct pegasus {
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struct work_struct init;
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struct work_struct init;
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};
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};
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static void pegasus_control_msg(struct pegasus *pegasus, u8 *data, int len)
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static int pegasus_control_msg(struct pegasus *pegasus, u8 *data, int len)
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{
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{
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const int sizeof_buf = len + 2;
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const int sizeof_buf = len + 2;
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int result;
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int result;
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int error;
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u8 *cmd_buf;
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u8 *cmd_buf;
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cmd_buf = kmalloc(sizeof_buf, GFP_KERNEL);
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cmd_buf = kmalloc(sizeof_buf, GFP_KERNEL);
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if (!cmd_buf)
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if (!cmd_buf)
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return;
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return -ENOMEM;
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cmd_buf[0] = NOTETAKER_REPORT_ID;
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cmd_buf[0] = NOTETAKER_REPORT_ID;
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cmd_buf[1] = len;
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cmd_buf[1] = len;
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@ -101,17 +102,23 @@ static void pegasus_control_msg(struct pegasus *pegasus, u8 *data, int len)
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0, 0, cmd_buf, sizeof_buf,
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0, 0, cmd_buf, sizeof_buf,
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USB_CTRL_SET_TIMEOUT);
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USB_CTRL_SET_TIMEOUT);
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if (result != sizeof_buf)
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dev_err(&pegasus->usbdev->dev, "control msg error\n");
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kfree(cmd_buf);
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kfree(cmd_buf);
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if (unlikely(result != sizeof_buf)) {
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error = result < 0 ? result : -EIO;
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dev_err(&pegasus->usbdev->dev, "control msg error: %d\n",
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error);
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return error;
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}
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return 0;
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}
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}
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static void pegasus_set_mode(struct pegasus *pegasus, u8 mode, u8 led)
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static int pegasus_set_mode(struct pegasus *pegasus, u8 mode, u8 led)
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{
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{
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u8 cmd[] = { NOTETAKER_SET_CMD, NOTETAKER_SET_MODE, led, mode };
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u8 cmd[] = { NOTETAKER_SET_CMD, NOTETAKER_SET_MODE, led, mode };
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pegasus_control_msg(pegasus, cmd, sizeof(cmd));
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return pegasus_control_msg(pegasus, cmd, sizeof(cmd));
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}
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}
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static void pegasus_parse_packet(struct pegasus *pegasus)
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static void pegasus_parse_packet(struct pegasus *pegasus)
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@ -191,8 +198,12 @@ static void pegasus_irq(struct urb *urb)
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static void pegasus_init(struct work_struct *work)
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static void pegasus_init(struct work_struct *work)
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{
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{
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struct pegasus *pegasus = container_of(work, struct pegasus, init);
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struct pegasus *pegasus = container_of(work, struct pegasus, init);
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int error;
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pegasus_set_mode(pegasus, PEN_MODE_XY, NOTETAKER_LED_MOUSE);
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error = pegasus_set_mode(pegasus, PEN_MODE_XY, NOTETAKER_LED_MOUSE);
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if (error)
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dev_err(&pegasus->usbdev->dev, "pegasus_set_mode error: %d\n",
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error);
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}
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}
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static int pegasus_open(struct input_dev *dev)
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static int pegasus_open(struct input_dev *dev)
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@ -208,7 +219,7 @@ static int pegasus_open(struct input_dev *dev)
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if (usb_submit_urb(pegasus->irq, GFP_KERNEL))
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if (usb_submit_urb(pegasus->irq, GFP_KERNEL))
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retval = -EIO;
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retval = -EIO;
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pegasus_set_mode(pegasus, PEN_MODE_XY, NOTETAKER_LED_MOUSE);
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retval = pegasus_set_mode(pegasus, PEN_MODE_XY, NOTETAKER_LED_MOUSE);
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usb_autopm_put_interface(pegasus->intf);
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usb_autopm_put_interface(pegasus->intf);
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