Commit 98ece19f authored May 14, 2020 by Tero Kristo Committed by Tony Lindgren May 19, 2020

soc: ti: omap-prm: use atomic iopoll instead of sleeping one



The reset handling APIs for omap-prm can be invoked PM runtime which
runs in atomic context. For this to work properly, switch to atomic
iopoll version instead of the current which can sleep. Otherwise,
this throws a "BUG: scheduling while atomic" warning. Issue is seen
rather easily when CONFIG_PREEMPT is enabled.

Signed-off-by: Tero Kristo <t-kristo@ti.com>
Acked-by: Santosh Shilimkar <ssantosh@kernel.org>
Signed-off-by: Tony Lindgren <tony@atomide.com>

parent fb6823a6

drivers/soc/ti/omap_prm.c

+4 −4

Original line number	Diff line number	Diff line
		@@ -256,7 +256,7 @@ static int omap_reset_deassert(struct reset_controller_dev *rcdev,
		goto exit;

		/* wait for the status to be set */
		ret = readl_relaxed_poll_timeout(reset->prm->base +
		ret = readl_relaxed_poll_timeout_atomic(reset->prm->base +
		reset->prm->data->rstst,
		v, v & BIT(st_bit), 1,
		OMAP_RESET_MAX_WAIT);

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