dmaengine: ste_dma40: Fix probe runtime PM disable

Some d40_probe() error paths jump to destroy_cache before runtime PM has
been enabled for the DMA controller device. The label unconditionally calls
pm_runtime_disable(), which increments disable_depth even though this probe
attempt never enabled runtime PM.

Use devm_pm_runtime_set_active_enabled() to mark the controller active,
enable runtime PM and register balanced cleanup for probe failure. This
avoids both the disable-depth imbalance and ad-hoc probe state tracking.

The interrupt handler uses pm_runtime_get_if_active() and cannot
acknowledge a pending interrupt while runtime PM is disabled. Request the
IRQ only after enabling runtime PM so the handler cannot enter an
unacknowledged interrupt loop during probe.

Fixes: 0618c077a8c2 ("dmaengine: ste_dma40: Fix PM disable depth imbalance in d40_probe")
Reported-by: sashiko-bot@kernel.org
Closes: https://lore.kernel.org/dmaengine/20260618051539.15E201F000E9@smtp.kernel.org/
Assisted-by: LLM
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Signed-off-by: Linus Walleij <linusw@kernel.org>
Link: https://patch.msgid.link/20260927-dma40-fixes-v7-5-89f595e8851d@kernel.org
Signed-off-by: Vinod Koul <vkoul@kernel.org>

0 files changed, 0 insertions, 0 deletions