Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-11-22 12:11:40 +00:00
Code Issues Packages Projects Releases Wiki Activity

usb: dwc3: ep0: Don't reset resource alloc flag (including ep0)

Browse Source 
The DWC3_EP_RESOURCE_ALLOCATED flag ensures that the resource of an
endpoint is only assigned once. Unless the endpoint is reset, don't
clear this flag. Otherwise we may set endpoint resource again, which
prevents the driver from initiate transfer after handling a STALL or
endpoint halt to the control endpoint.

Commit f2e0eee470 ("usb: dwc3: ep0: Don't reset resource alloc flag")
was fixing the initial issue, but did this only for physical ep1. Since
the function dwc3_ep0_stall_and_restart is resetting the flags for both
physical endpoints, this also has to be done for ep0.

Cc: stable@vger.kernel.org
Fixes: b311048c17 ("usb: dwc3: gadget: Rewrite endpoint allocation flow")
Acked-by: Thinh Nguyen <Thinh.Nguyen@synopsys.com>
Signed-off-by: Michael Grzeschik <m.grzeschik@pengutronix.de>
Link: https://lore.kernel.org/r/20240814-dwc3hwep0reset-v2-1-29e1d7d923ea@pengutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Michael Grzeschik 2024-08-15 08:40:29 +02:00 committed by Greg Kroah-Hartman
parent 3a8839bbb8
commit 72fca8371f
1 changed files with 2 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/usb/dwc3/ep0.c
View File

@ -232,7 +232,8 @@ 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_ENABLED;
dep->flags &= DWC3_EP_RESOURCE_ALLOCATED;
dep->flags |= DWC3_EP_ENABLED;
dwc->delayed_status = false;
if (!list_empty(&dep->pending_list)) {