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

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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>
This commit is contained in:
Tero Kristo 2020-05-14 10:37:18 +03:00 committed by Tony Lindgren
parent fb6823a6f9
commit 98ece19f24
1 changed files with 4 additions and 4 deletions
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8
drivers/soc/ti/omap_prm.c
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@ -256,10 +256,10 @@ 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 +
reset->prm->data->rstst,
v, v & BIT(st_bit), 1,
OMAP_RESET_MAX_WAIT);
ret = readl_relaxed_poll_timeout_atomic(reset->prm->base +
reset->prm->data->rstst,
v, v & BIT(st_bit), 1,
OMAP_RESET_MAX_WAIT);
if (ret)
pr_err("%s: timedout waiting for %s:%lu\n", __func__,
reset->prm->data->name, id);