mirror of
https://github.com/genodelabs/genode.git
synced 2024-12-21 22:47:50 +00:00
60 lines
2.8 KiB
Diff
60 lines
2.8 KiB
Diff
From e91ac20889d1a26d077cc511365cd7ff4346a6f3 Mon Sep 17 00:00:00 2001
|
|
From: Weitao Wang <WeitaoWang-oc@zhaoxin.com>
|
|
Date: Fri, 8 Apr 2022 16:48:21 +0300
|
|
Subject: [PATCH] USB: Fix xhci event ring dequeue pointer ERDP update issue
|
|
|
|
In some situations software handles TRB events slower than adding TRBs.
|
|
If the number of TRB events to be processed in a given interrupt is exactly
|
|
the same as the event ring size 256, then the local variable
|
|
"event_ring_deq" that holds the initial dequeue position is equal to
|
|
software_dequeue after handling all 256 interrupts.
|
|
|
|
It will cause driver to not update ERDP to hardware,
|
|
|
|
Software dequeue pointer is out of sync with ERDP on interrupt exit.
|
|
On the next interrupt, the event ring may full but driver will not
|
|
update ERDP as software_dequeue is equal to ERDP.
|
|
|
|
[ 536.377115] xhci_hcd 0000:00:12.0: ERROR unknown event type 37
|
|
[ 566.933173] sd 8:0:0:0: [sdb] tag#27 uas_eh_abort_handler 0 uas-tag 7 inflight: CMD OUT
|
|
[ 566.933181] sd 8:0:0:0: [sdb] tag#27 CDB: Write(10) 2a 00 17 71 e6 78 00 00 08 00
|
|
[ 572.041186] xhci_hcd On some situataions,the0000:00:12.0: xHCI host not responding to stop endpoint command.
|
|
[ 572.057193] xhci_hcd 0000:00:12.0: Host halt failed, -110
|
|
[ 572.057196] xhci_hcd 0000:00:12.0: xHCI host controller not responding, assume dead
|
|
[ 572.057236] sd 8:0:0:0: [sdb] tag#26 uas_eh_abort_handler 0 uas-tag 6 inflight: CMD
|
|
[ 572.057240] sd 8:0:0:0: [sdb] tag#26 CDB: Write(10) 2a 00 38 eb cc d8 00 00 08 00
|
|
[ 572.057244] sd 8:0:0:0: [sdb] tag#25 uas_eh_abort_handler 0 uas-tag 5 inflight: CMD
|
|
|
|
Hardware ERDP is updated mid event handling if there are more than 128
|
|
events in an interrupt (half of ring size).
|
|
Fix this by updating the software local variable at the same time as
|
|
hardware ERDP.
|
|
|
|
[commit message rewording -Mathias]
|
|
|
|
Fixes: dc0ffbea5729 ("usb: host: xhci: update event ring dequeue pointer on purpose")
|
|
Reviewed-by: Peter Chen <peter.chen@kernel.org>
|
|
Signed-off-by: Weitao Wang <WeitaoWang-oc@zhaoxin.com>
|
|
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
|
|
Link: https://lore.kernel.org/r/20220408134823.2527272-2-mathias.nyman@linux.intel.com
|
|
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
---
|
|
drivers/usb/host/xhci-ring.c | 1 +
|
|
1 file changed, 1 insertion(+)
|
|
|
|
diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c
|
|
index d0b6806275e0..f9707997969d 100644
|
|
--- a/drivers/usb/host/xhci-ring.c
|
|
+++ b/drivers/usb/host/xhci-ring.c
|
|
@@ -3141,6 +3141,7 @@ irqreturn_t xhci_irq(struct usb_hcd *hcd)
|
|
if (event_loop++ < TRBS_PER_SEGMENT / 2)
|
|
continue;
|
|
xhci_update_erst_dequeue(xhci, event_ring_deq);
|
|
+ event_ring_deq = xhci->event_ring->dequeue;
|
|
|
|
/* ring is half-full, force isoc trbs to interrupt more often */
|
|
if (xhci->isoc_bei_interval > AVOID_BEI_INTERVAL_MIN)
|
|
--
|
|
2.25.1
|
|
|