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| author | Lu Baolu <baolu.lu@linux.intel.com> | 2016-09-09 12:51:27 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-10-16 17:50:36 +0200 |
| commit | 2a25eb7a82101c6f49f2612c8b958685e8588173 (patch) | |
| tree | 19e841bb49df272adf98bd56b79ed435b766dd78 | |
| parent | 7ea90daac4f3c6a3dc5592e4faf8ba1905050c4c (diff) | |
| download | linux-stable-2a25eb7a82101c6f49f2612c8b958685e8588173.tar.gz linux-stable-2a25eb7a82101c6f49f2612c8b958685e8588173.tar.bz2 linux-stable-2a25eb7a82101c6f49f2612c8b958685e8588173.zip | |
usb: dwc3: fix Clear Stall EP command failure
commit 5e6c88d28ccbe72bedee1fbf4f9fea4764208598 upstream.
Commit 50c763f8c1bac ("usb: dwc3: Set the ClearPendIN bit on Clear
Stall EP command") sets ClearPendIN bit for all IN endpoints of
v2.60a+ cores. This causes ClearStall command fails on 2.60+ cores
operating in HighSpeed mode.
In page 539 of 2.60a specification:
"When issuing Clear Stall command for IN endpoints in SuperSpeed
mode, the software must set the "ClearPendIN" bit to '1' to
clear any pending IN transcations, so that the device does not
expect any ACK TP from the host for the data sent earlier."
It's obvious that we only need to apply this rule to those IN
endpoints that currently operating in SuperSpeed mode.
Fixes: 50c763f8c1bac ("usb: dwc3: Set the ClearPendIN bit on Clear Stall EP command")
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/usb/dwc3/gadget.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index 05a5300aa1ab..b16813c04484 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -363,7 +363,8 @@ static int dwc3_send_clear_stall_ep_cmd(struct dwc3_ep *dep) * IN transfers due to a mishandled error condition. Synopsys * STAR 9000614252. */ - if (dep->direction && (dwc->revision >= DWC3_REVISION_260A)) + if (dep->direction && (dwc->revision >= DWC3_REVISION_260A) && + (dwc->gadget.speed >= USB_SPEED_SUPER)) cmd |= DWC3_DEPCMD_CLEARPENDIN; memset(¶ms, 0, sizeof(params)); |