From: Christian Gromm <christian.gromm@microchip.com>
Date: Mon, 28 Sep 2015 15:18:34 +0000 (+0200)
Subject: staging: most: fix USB babble on IN pipe
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=9161e9311c29e905c8b1cf9f10f5010239d49975;p=linux-beck.git

staging: most: fix USB babble on IN pipe

This patch prevents the HDM USB from submitting an URB with a buffer size
unaligned to 512 bytes to the USB subsystem.

Signed-off-by: Andrey Shvetsov <andrey.shvetsov@k2l.de>
Signed-off-by: Christian Gromm <christian.gromm@microchip.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/staging/most/hdm-usb/hdm_usb.c b/drivers/staging/most/hdm-usb/hdm_usb.c
index 9bbefaaa0134..9006793aec64 100644
--- a/drivers/staging/most/hdm-usb/hdm_usb.c
+++ b/drivers/staging/most/hdm-usb/hdm_usb.c
@@ -711,7 +711,7 @@ static int hdm_enqueue(struct most_interface *iface, int channel, struct mbo *mb
 				  usb_rcvbulkpipe(mdev->usb_device,
 						  mdev->ep_address[channel]),
 				  virt_address,
-				  length,
+				  length + conf->extra_len,
 				  hdm_read_completion,
 				  mbo);
 	}
@@ -771,6 +771,7 @@ static int hdm_configure_channel(struct most_interface *iface, int channel,
 	    !((conf->data_type == MOST_CH_ISOC_AVP) &&
 	      (conf->packets_per_xact != 0xFF))) {
 		mdev->padding_active[channel] = false;
+		conf->extra_len = 0;
 		goto exit;
 	}