From 80ab414afdc9543686d8258dd7b933a410df3c4e Mon Sep 17 00:00:00 2001
From: Ilya Yanok <ilya.yanok@cogentembedded.com>
Date: Sun, 15 Jul 2012 04:43:50 +0000
Subject: [PATCH] usb: pass cache-aligned buffer to usb_get_descriptor()
usb_get_descriptor passes it's buffer argument directly to
usb_control_msg() so it has to be properly aligned/padded.
Signed-off-by: Ilya Yanok <ilya.yanok@cogentembedded.com>
---
common/usb.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/common/usb.c b/common/usb.c
index c80155ce76..46f4741690 100644
--- a/common/usb.c
+++ b/common/usb.c
@@ -799,12 +799,13 @@ int usb_new_device(struct usb_device *dev)
dev->epmaxpacketin[0] = 8;
dev->epmaxpacketout[0] = 8;
- err = usb_get_descriptor(dev, USB_DT_DEVICE, 0, &dev->descriptor, 8);
+ err = usb_get_descriptor(dev, USB_DT_DEVICE, 0, tmpbuf, 8);
if (err < 8) {
printf("\n USB device not responding, " \
"giving up (status=%lX)\n", dev->status);
return 1;
}
+ memcpy(&dev->descriptor, tmpbuf, 8);
#else
/* This is a Windows scheme of initialization sequence, with double
* reset of the device (Linux uses the same sequence)
@@ -893,7 +894,7 @@ int usb_new_device(struct usb_device *dev)
tmp = sizeof(dev->descriptor);
err = usb_get_descriptor(dev, USB_DT_DEVICE, 0,
- &dev->descriptor, sizeof(dev->descriptor));
+ tmpbuf, sizeof(dev->descriptor));
if (err < tmp) {
if (err < 0)
printf("unable to get device descriptor (error=%d)\n",
@@ -903,6 +904,7 @@ int usb_new_device(struct usb_device *dev)
"(expected %i, got %i)\n", tmp, err);
return 1;
}
+ memcpy(&dev->descriptor, tmpbuf, sizeof(dev->descriptor));
/* correct le values */
le16_to_cpus(&dev->descriptor.bcdUSB);
le16_to_cpus(&dev->descriptor.idVendor);
--
2.39.5