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Input: pegasus_notetaker - handle usb control msg errors

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Signed-off-by: Martin Kepplinger <martink@posteo.de>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This commit is contained in:
Martin Kepplinger 2016-07-19 14:13:02 -07:00 committed by Dmitry Torokhov
parent 3746e56752
commit 168c1398e0
1 changed files with 20 additions and 9 deletions
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29
drivers/input/tablet/pegasus_notetaker.c
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@ -80,15 +80,16 @@ 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;
int error;
u8 *cmd_buf;
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 +102,23 @@ 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");
kfree(cmd_buf);
if (unlikely(result != sizeof_buf)) {
error = result < 0 ? result : -EIO;
dev_err(&pegasus->usbdev->dev, "control msg error: %d\n",
error);
return error;
}
return 0;
}
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)
@ -191,8 +198,12 @@ static void pegasus_irq(struct urb *urb)
static void pegasus_init(struct work_struct *work)
{
struct pegasus *pegasus = container_of(work, struct pegasus, init);
int error;
pegasus_set_mode(pegasus, PEN_MODE_XY, NOTETAKER_LED_MOUSE);
error = pegasus_set_mode(pegasus, PEN_MODE_XY, NOTETAKER_LED_MOUSE);
if (error)
dev_err(&pegasus->usbdev->dev, "pegasus_set_mode error: %d\n",
error);
}
static int pegasus_open(struct input_dev *dev)
@ -208,7 +219,7 @@ static int pegasus_open(struct input_dev *dev)
if (usb_submit_urb(pegasus->irq, GFP_KERNEL))
retval = -EIO;
pegasus_set_mode(pegasus, PEN_MODE_XY, NOTETAKER_LED_MOUSE);
retval = pegasus_set_mode(pegasus, PEN_MODE_XY, NOTETAKER_LED_MOUSE);
usb_autopm_put_interface(pegasus->intf);