Commit 302b9562 authored by Lars Poeschel's avatar Lars Poeschel Committed by Samuel Ortiz
Browse files

mfd: viperboard: Do version query in dma memory 



The query for the viperboard version was done with memory buffer
on the stack but usb transfers need dma capable memory buffer.
This is fixed now.

Signed-off-by: default avatarLars Poeschel <poeschel@lemonage.de>
Signed-off-by: default avatarSamuel Ortiz <sameo@linux.intel.com>
parent 3c39c9c6

drivers/mfd/viperboard.c

+4 −5
Original line number Diff line number Diff line
@@ -56,7 +56,6 @@ static int vprbrd_probe(struct usb_interface *interface, 


	u16 version = 0;

	int pipe, ret;

	unsigned char buf[1];



	/* allocate memory for our device state and initialize it */

	vb = kzalloc(sizeof(*vb), GFP_KERNEL);
@@ -76,17 +75,17 @@ static int vprbrd_probe(struct usb_interface *interface, 
	/* get version information, major first, minor then */

	pipe = usb_rcvctrlpipe(vb->usb_dev, 0);

	ret = usb_control_msg(vb->usb_dev, pipe, VPRBRD_USB_REQUEST_MAJOR,

		VPRBRD_USB_TYPE_IN, 0x0000, 0x0000, buf, 1,

		VPRBRD_USB_TYPE_IN, 0x0000, 0x0000, vb->buf, 1,

		VPRBRD_USB_TIMEOUT_MS);

	if (ret == 1)

		version = buf[0];

		version = vb->buf[0];



	ret = usb_control_msg(vb->usb_dev, pipe, VPRBRD_USB_REQUEST_MINOR,

		VPRBRD_USB_TYPE_IN, 0x0000, 0x0000, buf, 1,

		VPRBRD_USB_TYPE_IN, 0x0000, 0x0000, vb->buf, 1,

		VPRBRD_USB_TIMEOUT_MS);

	if (ret == 1) {

		version <<= 8;

		version = version | buf[0];

		version = version | vb->buf[0];

	}



	dev_info(&interface->dev,

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