-----Original Message----- From: Felipe Balbi [mailto:felipe.balbi@xxxxxxxxxxxxxxx] Sent: Friday, December 08, 2017 6:44 PM To: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>; Yinbo Zhu <yinbo.zhu@xxxxxxx> Cc: Mathias Nyman <mathias.nyman@xxxxxxxxx>; open list:DESIGNWARE USB3 DRD IP DRIVER <linux-usb@xxxxxxxxxxxxxxx>; open list:DESIGNWARE USB3 DRD IP DRIVER <linux-omap@xxxxxxxxxxxxxxx>; open list <linux-kernel@xxxxxxxxxxxxxxx>; Xiaobo Xie <xiaobo.xie@xxxxxxx>; Jerry Huang <jerry.huang@xxxxxxx>; Ran Wang <ran.wang_1@xxxxxxx> Subject: Re: [PATCH v2] usb: host: Implement workaround for Erratum A-009611 >Hi, >Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> writes: > On Fri, Dec 08, 2017 at 05:49:41PM +0800, yinbo.zhu@xxxxxxx wrote: >> From: "yinbo.zhu" <yinbo.zhu@xxxxxxx> >> >> Description: This is a occasional problem where the software > > No need for a "Description:" word. That's just assumed here, right? I will remove "Description:" thanks. >> issues an End Transfer command while a USB transfer is in progress, >> resulting in the TxFIFO being flushed when the lower layer is >> waiting for data,causing the super speed (SS) transmit to get blocked. >> If the End Transfer command is issued on an IN endpoint to flush out >> the pending transfers when the same IN endpoint is doing transfers on >> the USB, then depending upon the timing of the End Transfer (and the >> resulting internal FIFO flush),the lower layer (U3PTL/U3MAC) could >> get stuck waiting for data indefinitely. This blocks the transmission >> path on the SS, and no DP/ACK/ERDY/DEVNOTIF packets can be sent from >> the device. >> Impact: If this issue happens and the transmission gets blocked, then >> the USB host aborts and resets/re-enumerates the device. >> This unblocks the transmitt engine and the device functions normally. >> >> Workaround: Software must wait for all existing TRBs to complete >> before issuing End transfer command. >> >> Configs Affected: >> LS1088-48A-R1.0, LS2081A-R1.1, LS2088-48A-R1.0, LS2088-48A-R1.1, >> LX2160-2120-2080A-R1. > > What are these Configs? That doesn't seem to match up with anything > that is in the kernel tree that I can see. These configs is soc information, I don't enable it on these platform dts. Although the erratum issue can't be reproduced. >> >> Signed-off-by: yinbo.zhu <yinbo.zhu@xxxxxxx> >> --- >> drivers/usb/dwc3/core.c | 3 +++ >> drivers/usb/dwc3/core.h | 3 +++ >> drivers/usb/dwc3/host.c | 3 +++ >> drivers/usb/host/xhci-plat.c | 4 ++++ >> drivers/usb/host/xhci.c | 24 ++++++++++++++++++------ >> drivers/usb/host/xhci.h | 1 + >> 6 files changed, 32 insertions(+), 6 deletions(-) >> >> diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c index >> 5cb3f6795b0b..071e7cea8cbb 100644 >> --- a/drivers/usb/dwc3/core.c >> +++ b/drivers/usb/dwc3/core.c >> @@ -1106,6 +1106,9 @@ static void dwc3_get_properties(struct dwc3 >> *dwc) >> >> dwc->quirk_reverse_in_out = device_property_read_bool(dev, >> "snps,quirk_reverse_in_out"); >This was generated on vendor tree. This quirk doesn't exist in dwc3. Also, >update your tree and review MAINTAINERS file. It has been almost 2 years since I left TI :-) >-- >Balbi Hi Balbi, The quirk that I had add it in dwc3. Your meaning is that I can't use quirk to enable or disable the erratum, isn't it? The tree is git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git, I had updated it. Thanks. Yinbo -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
