Messages in this thread |  | | From | Lu Baolu <> | Subject | [PATCH v4 0/5] usb: xhci: Handle USB transaction error on address command | Date | Thu, 17 Aug 2017 09:04:22 +0800 |
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Xhci driver handles USB transaction errors on transfer events, but transaction errors are possible on address device command completion events as well.
The xHCI specification (section 4.6.5) says: A USB Transaction Error Completion Code for an Address Device Command may be due to a Stall response from a device. Software should issue a Disable Slot Command for the Device Slot then an Enable Slot Command to recover from this error.
The related discussion threads can be found through below links.
http://marc.info/?l=linux-usb&m=149362010728921&w=2 http://marc.info/?l=linux-usb&m=149252752825755&w=2
This patch set includes some fixes in xhci_disable_slot() as well which will be used to handle USB transaction error on address command.
--- Change log:
v1->v2: - Add 4 fixes in xhci_disable_slot which will be used to handle USB transaction error on address command.
v2->v3: - Add checking virt dev for test mode in PATCH 1/5.
v3->v4: - Resolve xhci->mutex locking issue in 5/5.
Lu Baolu (5): usb: xhci: Disable slot even virt-dev is null usb: xhci: Fix potential memory leak in xhci_disable_slot() usb: xhci: Fix memory leak when xhci_disable_slot() returns error usb: xhci: Return error when host is dead in xhci_disable_slot() usb: xhci: Handle USB transaction error on address command
drivers/usb/host/xhci-hub.c | 5 ++++- drivers/usb/host/xhci.c | 54 +++++++++++++++++++-------------------------- drivers/usb/host/xhci.h | 3 +-- 3 files changed, 28 insertions(+), 34 deletions(-)
-- 2.7.4
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