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usb: dwc3: ep0: Don't clear ep0 DWC3_EP_TRANSFER_STARTED

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BugLink: https://bugs.launchpad.net/bugs/2102118

[ Upstream commit 5d2fb074dea289c41f5aaf2c3f68286bee370634 ]

The driver cannot issue the End Transfer command to the SETUP transfer.
Don't clear DWC3_EP_TRANSFER_STARTED flag to make sure that the driver
won't send Start Transfer command again, which can cause no-resource
error. For example this can occur if the host issues a reset to the
device.

Cc: stable@vger.kernel.org
Fixes: 76cb323f80 ("usb: dwc3: ep0: clear all EP0 flags")
Signed-off-by: Thinh Nguyen <Thinh.Nguyen@synopsys.com>
Link: https://lore.kernel.org/r/d3d618185fd614bb7426352a9fc1199641d3b5f5.1731545781.git.Thinh.Nguyen@synopsys.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Koichiro Den <koichiro.den@canonical.com>
Signed-off-by: Stefan Bader <stefan.bader@canonical.com>
This commit is contained in:
Thinh Nguyen
2025-03-12 22:51:00 +09:00
committed by Stefan Bader
parent 3db25c8e9e
commit 4dc0b17c61
1 changed files with 1 additions and 1 deletions
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drivers/usb/dwc3/ep0.c
+1 -1
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@@ -231,7 +231,7 @@ void dwc3_ep0_stall_and_restart(struct dwc3 *dwc)
/* stall is always issued on EP0 */
dep = dwc->eps[0];
__dwc3_gadget_ep_set_halt(dep, 1, false);
dep->flags &= DWC3_EP_RESOURCE_ALLOCATED;
dep->flags &= DWC3_EP_RESOURCE_ALLOCATED | DWC3_EP_TRANSFER_STARTED;
dep->flags |= DWC3_EP_ENABLED;
dwc->delayed_status = false;