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usb: xhci: fix ring expansion regression in 6.13-rc1

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The source and destination rings were incorrectly assigned during the ring
linking process. The "source" ring, which contains the new segments,
was not spliced into the "destination" ring, leading to incorrect ring
expansion.

Fixes: fe688e5006 ("usb: xhci: refactor xhci_link_rings() to use source and destination rings")
Reported-by: Jeff Chua <jeff.chua.linux@gmail.com>
Closes: https://lore.kernel.org/lkml/CAAJw_ZtppNqC9XA=-WVQDr+vaAS=di7jo15CzSqONeX48H75MA@mail.gmail.com/
Signed-off-by: Niklas Neronin <niklas.neronin@linux.intel.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Link: https://lore.kernel.org/r/20241217102122.2316814-3-mathias.nyman@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Niklas Neronin 2024-12-17 12:21:22 +02:00 • committed by Greg Kroah-Hartman
parent e21ebe51af
commit b9252f80b8
1 changed files with 1 additions and 1 deletions
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2
drivers/usb/host/xhci-mem.c
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@ -436,7 +436,7 @@ int xhci_ring_expansion(struct xhci_hcd *xhci, struct xhci_ring *ring,
goto free_segments;
}
xhci_link_rings(xhci, ring, &new_ring);
xhci_link_rings(xhci, &new_ring, ring);
trace_xhci_ring_expansion(ring);
xhci_dbg_trace(xhci, trace_xhci_dbg_ring_expansion,
"ring expansion succeed, now has %d segments",