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Commit b2ce37d8 authored by Mathias Nyman's avatar Mathias Nyman Committed by Greg Kroah-Hartman
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usb: Flush altsetting 0 endpoints before reinitializating them after reset.



commit 89bb3dc13ac29a563f4e4c555e422882f64742bd upstream.

usb core avoids sending a Set-Interface altsetting 0 request after device
reset, and instead relies on calling usb_disable_interface() and
usb_enable_interface() to flush and reset host-side of those endpoints.

xHCI hosts allocate and set up endpoint ring buffers and host_ep->hcpriv
during usb_hcd_alloc_bandwidth() callback, which in this case is called
before flushing the endpoint in usb_disable_interface().

Call usb_disable_interface() before usb_hcd_alloc_bandwidth() to ensure
URBs are flushed before new ring buffers for the endpoints are allocated.

Otherwise host driver will attempt to find and remove old stale URBs
from a freshly allocated new ringbuffer.

Cc: stable <stable@kernel.org>
Fixes: 4fe0387a ("USB: don't send Set-Interface after reset")
Signed-off-by: default avatarMathias Nyman <mathias.nyman@linux.intel.com>
Link: https://lore.kernel.org/r/20250514132520.225345-1-mathias.nyman@linux.intel.com


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent ae57ce58
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