From: Olav Kongas Date: Mon, 17 Oct 2005 21:30:43 +0000 (-0700) Subject: [PATCH] isp116x-hcd: fix handling of short transfers X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=e9b765decfb49ddc105d303d491e1bee9769436f;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git [PATCH] isp116x-hcd: fix handling of short transfers Increased use of scatter-gather by usb-storage driver after 2.6.13 has exposed a buggy codepath in isp116x-hcd, which was probably never visited before: bug happened only for those urbs, for which URB_SHORT_NOT_OK was set AND short transfer occurred. The fix attached was tested in 2 ways: (a) it fixed failing initialization of a flash drive with an embedded hub; (b) the fix was tested with 'usbtest' against a modified g_zero driver (on top of net2280), which generated short bulk IN transfers of various lengths including multiples and non-multiples of max_packet_length. Signed-off-by: Olav Kongas Signed-off-by: Greg Kroah-Hartman Signed-off-by: Linus Torvalds --- diff --git a/drivers/usb/host/isp116x-hcd.c b/drivers/usb/host/isp116x-hcd.c index 41bbae83fc71..e142056b0d2c 100644 --- a/drivers/usb/host/isp116x-hcd.c +++ b/drivers/usb/host/isp116x-hcd.c @@ -326,7 +326,8 @@ static void postproc_atl_queue(struct isp116x *isp116x) usb_settoggle(udev, ep->epnum, ep->nextpid == USB_PID_OUT, - PTD_GET_TOGGLE(ptd) ^ 1); + PTD_GET_TOGGLE(ptd)); + urb->actual_length += PTD_GET_COUNT(ptd); urb->status = cc_to_error[TD_DATAUNDERRUN]; spin_unlock(&urb->lock); continue;