tree 6dbac31d998730f59fb219e310e4d769732453a5
parent e5051c055926e9d8d153f5811c56e88bf204ae99
author Niklas Neronin <niklas.neronin@linux.intel.com> 1758112747 -0400
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1758791630 +0200

usb: xhci: remove option to change a default ring's TRB cycle bit

[ Upstream commit e1b0fa863907a61e86acc19ce2d0633941907c8e ]

The TRB cycle bit indicates TRB ownership by the Host Controller (HC) or
Host Controller Driver (HCD). New rings are initialized with 'cycle_state'
equal to one, and all its TRBs' cycle bits are set to zero. When handling
ring expansion, set the source ring cycle bits to the same value as the
destination ring.

Move the cycle bit setting from xhci_segment_alloc() to xhci_link_rings(),
and remove the 'cycle_state' argument from xhci_initialize_ring_info().
The xhci_segment_alloc() function uses kzalloc_node() to allocate segments,
ensuring that all TRB cycle bits are initialized to zero.

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/20241106101459.775897-12-mathias.nyman@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Stable-dep-of: a5c98e8b1398 ("xhci: dbc: Fix full DbC transfer ring after several reconnects")
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>