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authorLars Poeschel <poeschel@lemonage.de>2012-11-26 11:24:53 +0100
committerSamuel Ortiz <sameo@linux.intel.com>2012-11-26 11:48:56 +0100
commit302b95621dc96651187c21fd66e5a44860e4c3b1 (patch)
tree7aaba49841ce5522631a7e550beeaa302ede4ce6 /drivers/mfd/viperboard.c
parent3c39c9c6e9bda4d234bd24aaf34606479f581f4a (diff)
downloadlinux-linaro-stable-302b95621dc96651187c21fd66e5a44860e4c3b1.tar.gz
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: Lars Poeschel <poeschel@lemonage.de> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Diffstat (limited to 'drivers/mfd/viperboard.c')
-rw-r--r--drivers/mfd/viperboard.c9
1 files changed, 4 insertions, 5 deletions
diff --git a/drivers/mfd/viperboard.c b/drivers/mfd/viperboard.c
index 276122b37199..af2a6703f34f 100644
--- a/drivers/mfd/viperboard.c
+++ b/drivers/mfd/viperboard.c
@@ -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,