From 2b7758f506b7af10910c4f9d12e4424821280734 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 commit 0ac3c0a4025f41748a083bdd4970cb3ede802b15 upstream. 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. Reported-by: Nishanth Menon Signed-off-by: Tony Lindgren Signed-off-by: Linus Walleij Signed-off-by: Greg Kroah-Hartman --- 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 fa2dcbcdb921a..c2f616f515c30 100644 --- a/drivers/pinctrl/pinctrl-single.c +++ b/drivers/pinctrl/pinctrl-single.c @@ -1616,6 +1616,9 @@ 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); } -- 2.47.2