usb: octeon-hcd: fix the FIFO-flush timeout computation

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cvmx_wait_tx_rx() computes its 100us deadline from
(u64)octeon_get_clock_rate - the address of the function, not its
return value; the parentheses have been missing since the
CVMX_WAIT_FOR_FIELD32 macro became a function. The cast makes it
compile silently, and the resulting deadline is effectively infinite.

On a healthy controller the flush bit clears on the first read and
nothing is noticed. On a controller whose PHY did not come up (for
example when the reference-clock configuration is wrong for the board),
txfflsh/rxfflsh never clear and probe spins forever in __delay() -
observed as a hard hang with a soft-lockup splat on a CN5020 board,
where the board watchdog then resets the system with no console output.

Call the function, restoring the 100us timeout the code always
intended.

Fixes: 3e195a80e0 ("Staging: octeon-usb: Replaces CVMX_WAIT_FOR_FIELD32 macro with a function")
Cc: stable@vger.kernel.org
Assisted-by: Claude:claude-opus-5
Signed-off-by: Orgad Shaneh <orgads@gmail.com>
Link: https://patch.msgid.link/20260901193100.1352110-1-orgads@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Orgad Shaneh 2026-09-01 19:30:27 +00:00 • committed by Greg Kroah-Hartman

parent 29480b05e6

commit 4c7a1b9f1f

1 changed files with 1 additions and 1 deletions

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drivers/usb/host/octeon-hcd.c

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