diff options
Diffstat (limited to 'target/linux/bcm27xx/patches-5.10/950-0733-usb-xhci-workaround-for-bogus-SET_DEQ_PENDING-endpoi.patch')
-rw-r--r-- | target/linux/bcm27xx/patches-5.10/950-0733-usb-xhci-workaround-for-bogus-SET_DEQ_PENDING-endpoi.patch | 41 |
1 files changed, 0 insertions, 41 deletions
diff --git a/target/linux/bcm27xx/patches-5.10/950-0733-usb-xhci-workaround-for-bogus-SET_DEQ_PENDING-endpoi.patch b/target/linux/bcm27xx/patches-5.10/950-0733-usb-xhci-workaround-for-bogus-SET_DEQ_PENDING-endpoi.patch deleted file mode 100644 index 4c61ee0bae..0000000000 --- a/target/linux/bcm27xx/patches-5.10/950-0733-usb-xhci-workaround-for-bogus-SET_DEQ_PENDING-endpoi.patch +++ /dev/null @@ -1,41 +0,0 @@ -From dedd960b894217ae0960a7ac493def9edfa96905 Mon Sep 17 00:00:00 2001 -From: Jonathan Bell <jonathan@raspberrypi.com> -Date: Wed, 11 Aug 2021 15:33:57 +0100 -Subject: [PATCH] usb: xhci: workaround for bogus SET_DEQ_PENDING - endpoint state - -See https://github.com/raspberrypi/linux/issues/3981 - -An unknown unsafe memory access can result in the ep_state variable -in xhci_virt_ep being trampled with a stuck SET_DEQ_PENDING state -despite successful completion of a Set TR Deq Pointer command. - -All URB enqueue/dequeue calls for the endpoint will fail in this state -so no transfers are possible until the device is reconnected. - -As a workaround, clear the flag if we see it set and issue a new Set -TR Deq command anyway - this should be harmless, as a prior Set TR Deq -command will only have been issued in the Stopped state, and if the -endpoint is Running then the controller is required to ignore it and -respond with a Context State Error event TRB. - -Signed-off-by: Jonathan Bell <jonathan@raspberrypi.com> ---- - drivers/usb/host/xhci-ring.c | 6 +++--- - 1 file changed, 3 insertions(+), 3 deletions(-) - ---- a/drivers/usb/host/xhci-ring.c -+++ b/drivers/usb/host/xhci-ring.c -@@ -4270,9 +4270,9 @@ void xhci_queue_new_dequeue_state(struct - } - ep = &xhci->devs[slot_id]->eps[ep_index]; - if ((ep->ep_state & SET_DEQ_PENDING)) { -- xhci_warn(xhci, "WARN Cannot submit Set TR Deq Ptr\n"); -- xhci_warn(xhci, "A Set TR Deq Ptr command is pending.\n"); -- return; -+ xhci_warn(xhci, "WARN A Set TR Deq Ptr command is pending for slot %u ep %u\n", -+ slot_id, ep_index); -+ ep->ep_state &= ~SET_DEQ_PENDING; - } - - /* This function gets called from contexts where it cannot sleep */ |