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USB: yurex: fix memory leak and corrupted messages 

This fixes the memory leak on disconnecting the device.
In addition, it fixes some messages corrupted by incorrect encoding.

Signed-off-by: Tomoki Sekiyama <tomoki.sekiyama@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
hifive-unleashed-5.1
Tomoki Sekiyama 2010-10-03 06:59:06 +09:00 committed by Greg Kroah-Hartman
parent 1b62d25839
commit e06ea97fa4
1 changed files with 17 additions and 6 deletions
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23
drivers/usb/misc/yurex.c
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@ -37,7 +37,7 @@
#define CMD_PADDING 0xff
#define YUREX_BUF_SIZE 8
#define YUREX_WRITE_TIMEOUT (HZ)
#define YUREX_WRITE_TIMEOUT (HZ*2)
/* table of devices that work with this driver */
static struct usb_device_id yurex_table[] = {
@ -83,7 +83,7 @@ static void yurex_control_callback(struct urb *urb)
int status = urb->status;
if (status) {
err("%s - control failed: %d¥n", __func__, status);
err("%s - control failed: %d\n", __func__, status);
wake_up_interruptible(&dev->waitq);
return;
}
@ -97,6 +97,16 @@ static void yurex_delete(struct kref *kref)
dbg("yurex_delete");
usb_put_dev(dev->udev);
if (dev->cntl_urb) {
usb_kill_urb(dev->cntl_urb);
if (dev->cntl_req)
usb_free_coherent(dev->udev, YUREX_BUF_SIZE,
dev->cntl_req, dev->cntl_urb->setup_dma);
if (dev->cntl_buffer)
usb_free_coherent(dev->udev, YUREX_BUF_SIZE,
dev->cntl_buffer, dev->cntl_urb->transfer_dma);
usb_free_urb(dev->cntl_urb);
}
if (dev->urb) {
usb_kill_urb(dev->urb);
if (dev->int_buffer)
@ -253,7 +263,7 @@ static int yurex_probe(struct usb_interface *interface, const struct usb_device_
usb_sndctrlpipe(dev->udev, 0),
(void *)dev->cntl_req, dev->cntl_buffer,
YUREX_BUF_SIZE, yurex_control_callback, dev);
dev->cntl_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
dev->cntl_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
/* allocate interrupt URB */
@ -276,6 +286,7 @@ static int yurex_probe(struct usb_interface *interface, const struct usb_device_
usb_rcvintpipe(dev->udev, dev->int_in_endpointAddr),
dev->int_buffer, YUREX_BUF_SIZE, yurex_interrupt,
dev, 1);
dev->cntl_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
if (usb_submit_urb(dev->urb, GFP_KERNEL)) {
retval = -EIO;
err("Could not submitting URB");
@ -296,7 +307,7 @@ static int yurex_probe(struct usb_interface *interface, const struct usb_device_
dev->bbu = -1;
dev_info(&interface->dev,
"USB Yurex device now attached to Yurex-%d¥n",
"USB YUREX device now attached to Yurex #%d\n",
interface->minor);
return 0;
@ -331,7 +342,7 @@ static void yurex_disconnect(struct usb_interface *interface)
/* decrement our usage count */
kref_put(&dev->kref, yurex_delete);
dev_info(&interface->dev, "USB Yurex #%d now disconnected", minor);
dev_info(&interface->dev, "USB YUREX #%d now disconnected\n", minor);
}
static struct usb_driver yurex_driver = {
@ -417,7 +428,7 @@ static ssize_t yurex_read(struct file *file, char *buffer, size_t count, loff_t
}
spin_lock_irqsave(&dev->lock, flags);
bytes_read = snprintf(in_buffer, 20, "%lld¥n", dev->bbu);
bytes_read = snprintf(in_buffer, 20, "%lld\n", dev->bbu);
spin_unlock_irqrestore(&dev->lock, flags);
if (*ppos < bytes_read) {