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Message-Id: <20230616203356.27343-3-raag.jadav@intel.com>
Date: Sat, 17 Jun 2023 02:03:55 +0530
From: Raag Jadav <raag.jadav@...el.com>
To: linus.walleij@...aro.org, mika.westerberg@...ux.intel.com,
andriy.shevchenko@...ux.intel.com
Cc: linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org,
mallikarjunappa.sangannavar@...el.com, pandith.n@...el.com,
Raag Jadav <raag.jadav@...el.com>
Subject: [PATCH for-next v1 2/3] pinctrl: baytrail: add warning for BYT_VAL_REG retrieval failure
Add warning for BYT_VAL_REG retrieval failure and continue such case
to avoid unintended reads/writes in pm_ops.
Signed-off-by: Raag Jadav <raag.jadav@...el.com>
---
drivers/pinctrl/intel/pinctrl-baytrail.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/drivers/pinctrl/intel/pinctrl-baytrail.c b/drivers/pinctrl/intel/pinctrl-baytrail.c
index 54d3c5c26944..97ead2c58b66 100644
--- a/drivers/pinctrl/intel/pinctrl-baytrail.c
+++ b/drivers/pinctrl/intel/pinctrl-baytrail.c
@@ -1758,6 +1758,10 @@ static int byt_gpio_suspend(struct device *dev)
vg->context.pads[i].conf0 = value;
reg = byt_gpio_reg(vg, pin, BYT_VAL_REG);
+ if (!reg) {
+ dev_warn(vg->dev, "Pin %i: can't retrieve VAL\n", i);
+ continue;
+ }
value = readl(reg) & BYT_VAL_RESTORE_MASK;
vg->context.pads[i].val = value;
}
@@ -1794,6 +1798,10 @@ static int byt_gpio_resume(struct device *dev)
}
reg = byt_gpio_reg(vg, pin, BYT_VAL_REG);
+ if (!reg) {
+ dev_warn(vg->dev, "Pin %i: can't retrieve VAL\n", i);
+ continue;
+ }
value = readl(reg);
if ((value & BYT_VAL_RESTORE_MASK) !=
vg->context.pads[i].val) {
--
2.17.1
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