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From:   William Breathitt Gray <vilhelm.gray@gmail.com>
To:     jic23@kernel.org
Cc:     linux-stm32@st-md-mailman.stormreply.com, kernel@pengutronix.de,
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        gwendal@chromium.org, alexandre.belloni@bootlin.com,
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        linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
        syednwaris@gmail.com, patrick.havelange@essensium.com,
        fabrice.gasnier@st.com, mcoquelin.stm32@gmail.com,
        alexandre.torgue@st.com, o.rempel@pengutronix.de,
        jarkko.nikula@linux.intel.com,
        William Breathitt Gray <vilhelm.gray@gmail.com>,
        Fabrice Gasnier <fabrice.gasnier@foss.st.com>
Subject: [PATCH v13 03/17] counter: Standardize to ERANGE for limit exceeded errors
Date:   Tue, 13 Jul 2021 18:53:07 +0900
Message-Id: <275a0de80b2eb272f5dc1641c511ed601c9f5848.1626165765.git.vilhelm.gray@gmail.com>
In-Reply-To: <cover.1626165764.git.vilhelm.gray@gmail.com>
References: <cover.1626165764.git.vilhelm.gray@gmail.com>
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ERANGE is a semantically better error code to return when an argument
value falls outside the supported limit range of a device.

Cc: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Cc: Oleksij Rempel <o.rempel@pengutronix.de>
Cc: Maxime Coquelin <mcoquelin.stm32@gmail.com>
Cc: Alexandre Torgue <alexandre.torgue@st.com>
Acked-by: Syed Nayyar Waris <syednwaris@gmail.com>
Reviewed-by: David Lechner <david@lechnology.com>
Reviewed-by: Fabrice Gasnier <fabrice.gasnier@foss.st.com>
Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com>
---
 drivers/counter/104-quad-8.c        | 6 +++---
 drivers/counter/intel-qep.c         | 2 +-
 drivers/counter/interrupt-cnt.c     | 3 +++
 drivers/counter/stm32-lptimer-cnt.c | 2 +-
 4 files changed, 8 insertions(+), 5 deletions(-)

diff --git a/drivers/counter/104-quad-8.c b/drivers/counter/104-quad-8.c
index b358b2b2b883..d54efdb8d393 100644
--- a/drivers/counter/104-quad-8.c
+++ b/drivers/counter/104-quad-8.c
@@ -154,7 +154,7 @@ static int quad8_count_write(struct counter_device *counter,
 
 	/* Only 24-bit values are supported */
 	if (val > 0xFFFFFF)
-		return -EINVAL;
+		return -ERANGE;
 
 	mutex_lock(&priv->lock);
 
@@ -669,7 +669,7 @@ static ssize_t quad8_count_preset_write(struct counter_device *counter,
 
 	/* Only 24-bit values are supported */
 	if (preset > 0xFFFFFF)
-		return -EINVAL;
+		return -ERANGE;
 
 	mutex_lock(&priv->lock);
 
@@ -714,7 +714,7 @@ static ssize_t quad8_count_ceiling_write(struct counter_device *counter,
 
 	/* Only 24-bit values are supported */
 	if (ceiling > 0xFFFFFF)
-		return -EINVAL;
+		return -ERANGE;
 
 	mutex_lock(&priv->lock);
 
diff --git a/drivers/counter/intel-qep.c b/drivers/counter/intel-qep.c
index 8d7ae28fbd67..85dd328ae1f6 100644
--- a/drivers/counter/intel-qep.c
+++ b/drivers/counter/intel-qep.c
@@ -320,7 +320,7 @@ static ssize_t spike_filter_ns_write(struct counter_device *counter,
 	}
 
 	if (length > INTEL_QEPFLT_MAX_COUNT(length))
-		return -EINVAL;
+		return -ERANGE;
 
 	mutex_lock(&qep->lock);
 	if (qep->enabled) {
diff --git a/drivers/counter/interrupt-cnt.c b/drivers/counter/interrupt-cnt.c
index 5df7cd13d4c7..66cac4900327 100644
--- a/drivers/counter/interrupt-cnt.c
+++ b/drivers/counter/interrupt-cnt.c
@@ -107,6 +107,9 @@ static int interrupt_cnt_write(struct counter_device *counter,
 {
 	struct interrupt_cnt_priv *priv = counter->priv;
 
+	if (val != (typeof(priv->count.counter))val)
+		return -ERANGE;
+
 	atomic_set(&priv->count, val);
 
 	return 0;
diff --git a/drivers/counter/stm32-lptimer-cnt.c b/drivers/counter/stm32-lptimer-cnt.c
index 78f383b77bd2..49aeb9e393f3 100644
--- a/drivers/counter/stm32-lptimer-cnt.c
+++ b/drivers/counter/stm32-lptimer-cnt.c
@@ -283,7 +283,7 @@ static ssize_t stm32_lptim_cnt_ceiling_write(struct counter_device *counter,
 		return ret;
 
 	if (ceiling > STM32_LPTIM_MAX_ARR)
-		return -EINVAL;
+		return -ERANGE;
 
 	priv->ceiling = ceiling;
 
-- 
2.32.0