From 1b96342880f3eab3b157df7b512855d34d667b7d Mon Sep 17 00:00:00 2001 From: Tony Lindgren Date: Tue, 31 May 2016 14:17:06 -0700 Subject: [PATCH] pinctrl: single: Fix missing flush of posted write for a wakeirq With many repeated suspend resume cycles, the pin specific wakeirq may not always work on omaps. This is because the write to enable the pin interrupt may not have reached the device over the interconnect before suspend happens. Let's fix the issue with a flush of posted write with a readback. Cc: stable@vger.kernel.org Reported-by: Nishanth Menon Signed-off-by: Tony Lindgren Signed-off-by: Linus Walleij --- drivers/pinctrl/pinctrl-single.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/pinctrl/pinctrl-single.c b/drivers/pinctrl/pinctrl-single.c index cf9bafa10acfb..bfdf720db270d 100644 --- a/drivers/pinctrl/pinctrl-single.c +++ b/drivers/pinctrl/pinctrl-single.c @@ -1580,6 +1580,9 @@ static inline void pcs_irq_set(struct pcs_soc_data *pcs_soc, else mask &= ~soc_mask; pcs->write(mask, pcswi->reg); + + /* flush posted write */ + mask = pcs->read(pcswi->reg); raw_spin_unlock(&pcs->lock); } -- 2.39.5