USB: io_edgeport: eliminate get_string()
Johan Hovold points out that get_string() is basically just a
re-implimentation of usb_string(). It is also buggy. It does DMA on
the stack and it doesn't handle negative returns from
usb_get_descriptor(). Plus unicode_to_ascii() is a rubbish function and
moving to usb_string() avoids using it.
Let's eliminate get_string() entirely.
Reported-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Dan Carpenter <error27@gmail.com>
Acked-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/usb/serial/io_edgeport.c b/drivers/usb/serial/io_edgeport.c
index 0945600..c055c8b 100644
--- a/drivers/usb/serial/io_edgeport.c
+++ b/drivers/usb/serial/io_edgeport.c
@@ -364,43 +364,6 @@
release_firmware(fw);
}
-
-/************************************************************************
- * *
- * Get string descriptor from device *
- * *
- ************************************************************************/
-static int get_string(struct usb_device *dev, int Id, char *string, int buflen)
-{
- struct usb_string_descriptor *StringDesc = NULL;
- struct usb_string_descriptor *pStringDesc = NULL;
- int ret = 0;
-
- dbg("%s - USB String ID = %d", __func__, Id);
-
- StringDesc = kmalloc(sizeof(*StringDesc), GFP_KERNEL);
- if (!StringDesc)
- goto free;
- if (usb_get_descriptor(dev, USB_DT_STRING, Id, StringDesc, sizeof(*StringDesc)) <= 0)
- goto free;
-
- pStringDesc = kmalloc(StringDesc->bLength, GFP_KERNEL);
- if (!pStringDesc)
- goto free;
-
- if (usb_get_descriptor(dev, USB_DT_STRING, Id, pStringDesc, StringDesc->bLength) <= 0)
- goto free;
-
- unicode_to_ascii(string, buflen, pStringDesc->wData, pStringDesc->bLength/2);
- ret = strlen(string);
- dbg("%s - USB String %s", __func__, string);
-free:
- kfree(StringDesc);
- kfree(pStringDesc);
- return ret;
-}
-
-
#if 0
/************************************************************************
*
@@ -2998,10 +2961,12 @@
usb_set_serial_data(serial, edge_serial);
/* get the name for the device from the device */
- i = get_string(dev, dev->descriptor.iManufacturer,
+ i = usb_string(dev, dev->descriptor.iManufacturer,
&edge_serial->name[0], MAX_NAME_LEN+1);
+ if (i < 0)
+ i = 0;
edge_serial->name[i++] = ' ';
- get_string(dev, dev->descriptor.iProduct,
+ usb_string(dev, dev->descriptor.iProduct,
&edge_serial->name[i], MAX_NAME_LEN+2 - i);
dev_info(&serial->dev->dev, "%s detected\n", edge_serial->name);
