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* [PATCH] i2c: i2c-stm32f7: fix the get_irq error cases
@ 2019-05-15 15:09 ` Fabrice Gasnier
  0 siblings, 0 replies; 8+ messages in thread
From: Fabrice Gasnier @ 2019-05-15 15:09 UTC (permalink / raw)
  To: wsa, pierre-yves.mordret
  Cc: mcoquelin.stm32, alexandre.torgue, linux-i2c, linux-stm32,
	linux-arm-kernel, linux-kernel

During probe, return the "get_irq" error value instead of -EINVAL which
allows the driver to be deferred probed if needed.
Fix also the case where of_irq_get() returns a negative value.
Note :
On failure of_irq_get() returns 0 or a negative value while
platform_get_irq() returns a negative value.

Fixes: aeb068c57214 ("i2c: i2c-stm32f7: add driver")

Signed-off-by: Fabien Dessenne <fabien.dessenne@st.com>
Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com>
---
 drivers/i2c/busses/i2c-stm32f7.c | 26 ++++++++++++++------------
 1 file changed, 14 insertions(+), 12 deletions(-)

diff --git a/drivers/i2c/busses/i2c-stm32f7.c b/drivers/i2c/busses/i2c-stm32f7.c
index 4284fc9..14fb105 100644
--- a/drivers/i2c/busses/i2c-stm32f7.c
+++ b/drivers/i2c/busses/i2c-stm32f7.c
@@ -25,7 +25,6 @@
 #include <linux/module.h>
 #include <linux/of.h>
 #include <linux/of_address.h>
-#include <linux/of_irq.h>
 #include <linux/of_platform.h>
 #include <linux/platform_device.h>
 #include <linux/pinctrl/consumer.h>
@@ -1812,15 +1811,14 @@ static struct i2c_algorithm stm32f7_i2c_algo = {
 
 static int stm32f7_i2c_probe(struct platform_device *pdev)
 {
-	struct device_node *np = pdev->dev.of_node;
 	struct stm32f7_i2c_dev *i2c_dev;
 	const struct stm32f7_i2c_setup *setup;
 	struct resource *res;
-	u32 irq_error, irq_event, clk_rate, rise_time, fall_time;
+	u32 clk_rate, rise_time, fall_time;
 	struct i2c_adapter *adap;
 	struct reset_control *rst;
 	dma_addr_t phy_addr;
-	int ret;
+	int irq_error, irq_event, ret;
 
 	i2c_dev = devm_kzalloc(&pdev->dev, sizeof(*i2c_dev), GFP_KERNEL);
 	if (!i2c_dev)
@@ -1832,16 +1830,20 @@ static int stm32f7_i2c_probe(struct platform_device *pdev)
 		return PTR_ERR(i2c_dev->base);
 	phy_addr = (dma_addr_t)res->start;
 
-	irq_event = irq_of_parse_and_map(np, 0);
-	if (!irq_event) {
-		dev_err(&pdev->dev, "IRQ event missing or invalid\n");
-		return -EINVAL;
+	irq_event = platform_get_irq(pdev, 0);
+	if (irq_event < 0) {
+		if (irq_event != -EPROBE_DEFER)
+			dev_err(&pdev->dev, "Failed to get IRQ event: %d\n",
+				irq_event);
+		return irq_event;
 	}
 
-	irq_error = irq_of_parse_and_map(np, 1);
-	if (!irq_error) {
-		dev_err(&pdev->dev, "IRQ error missing or invalid\n");
-		return -EINVAL;
+	irq_error = platform_get_irq(pdev, 1);
+	if (irq_error < 0) {
+		if (irq_error != -EPROBE_DEFER)
+			dev_err(&pdev->dev, "Failed to get IRQ error: %d\n",
+				irq_error);
+		return irq_error;
 	}
 
 	i2c_dev->clk = devm_clk_get(&pdev->dev, NULL);
-- 
2.7.4


^ permalink raw reply related	[flat|nested] 8+ messages in thread
* [PATCH] i2c: i2c-stm32f7: fix the get_irq error cases
@ 2019-05-15 15:09 ` Fabrice Gasnier
  0 siblings, 0 replies; 8+ messages in thread
From: Fabrice Gasnier @ 2019-05-15 15:09 UTC (permalink / raw)
  To: wsa, pierre-yves.mordret
  Cc: mcoquelin.stm32, alexandre.torgue, linux-i2c, linux-stm32,
	linux-arm-kernel, linux-kernel

During probe, return the "get_irq" error value instead of -EINVAL which
allows the driver to be deferred probed if needed.
Fix also the case where of_irq_get() returns a negative value.
Note :
On failure of_irq_get() returns 0 or a negative value while
platform_get_irq() returns a negative value.

Fixes: aeb068c57214 ("i2c: i2c-stm32f7: add driver")

Signed-off-by: Fabien Dessenne <fabien.dessenne@st.com>
Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com>
---
 drivers/i2c/busses/i2c-stm32f7.c | 26 ++++++++++++++------------
 1 file changed, 14 insertions(+), 12 deletions(-)

diff --git a/drivers/i2c/busses/i2c-stm32f7.c b/drivers/i2c/busses/i2c-stm32f7.c
index 4284fc9..14fb105 100644
--- a/drivers/i2c/busses/i2c-stm32f7.c
+++ b/drivers/i2c/busses/i2c-stm32f7.c
@@ -25,7 +25,6 @@
 #include <linux/module.h>
 #include <linux/of.h>
 #include <linux/of_address.h>
-#include <linux/of_irq.h>
 #include <linux/of_platform.h>
 #include <linux/platform_device.h>
 #include <linux/pinctrl/consumer.h>
@@ -1812,15 +1811,14 @@ static struct i2c_algorithm stm32f7_i2c_algo = {
 
 static int stm32f7_i2c_probe(struct platform_device *pdev)
 {
-	struct device_node *np = pdev->dev.of_node;
 	struct stm32f7_i2c_dev *i2c_dev;
 	const struct stm32f7_i2c_setup *setup;
 	struct resource *res;
-	u32 irq_error, irq_event, clk_rate, rise_time, fall_time;
+	u32 clk_rate, rise_time, fall_time;
 	struct i2c_adapter *adap;
 	struct reset_control *rst;
 	dma_addr_t phy_addr;
-	int ret;
+	int irq_error, irq_event, ret;
 
 	i2c_dev = devm_kzalloc(&pdev->dev, sizeof(*i2c_dev), GFP_KERNEL);
 	if (!i2c_dev)
@@ -1832,16 +1830,20 @@ static int stm32f7_i2c_probe(struct platform_device *pdev)
 		return PTR_ERR(i2c_dev->base);
 	phy_addr = (dma_addr_t)res->start;
 
-	irq_event = irq_of_parse_and_map(np, 0);
-	if (!irq_event) {
-		dev_err(&pdev->dev, "IRQ event missing or invalid\n");
-		return -EINVAL;
+	irq_event = platform_get_irq(pdev, 0);
+	if (irq_event < 0) {
+		if (irq_event != -EPROBE_DEFER)
+			dev_err(&pdev->dev, "Failed to get IRQ event: %d\n",
+				irq_event);
+		return irq_event;
 	}
 
-	irq_error = irq_of_parse_and_map(np, 1);
-	if (!irq_error) {
-		dev_err(&pdev->dev, "IRQ error missing or invalid\n");
-		return -EINVAL;
+	irq_error = platform_get_irq(pdev, 1);
+	if (irq_error < 0) {
+		if (irq_error != -EPROBE_DEFER)
+			dev_err(&pdev->dev, "Failed to get IRQ error: %d\n",
+				irq_error);
+		return irq_error;
 	}
 
 	i2c_dev->clk = devm_clk_get(&pdev->dev, NULL);
-- 
2.7.4

^ permalink raw reply related	[flat|nested] 8+ messages in thread
* [PATCH] i2c: i2c-stm32f7: fix the get_irq error cases
@ 2019-05-15 15:09 ` Fabrice Gasnier
  0 siblings, 0 replies; 8+ messages in thread
From: Fabrice Gasnier @ 2019-05-15 15:09 UTC (permalink / raw)
  To: wsa, pierre-yves.mordret
  Cc: alexandre.torgue, linux-kernel, linux-i2c, mcoquelin.stm32,
	linux-stm32, linux-arm-kernel

During probe, return the "get_irq" error value instead of -EINVAL which
allows the driver to be deferred probed if needed.
Fix also the case where of_irq_get() returns a negative value.
Note :
On failure of_irq_get() returns 0 or a negative value while
platform_get_irq() returns a negative value.

Fixes: aeb068c57214 ("i2c: i2c-stm32f7: add driver")

Signed-off-by: Fabien Dessenne <fabien.dessenne@st.com>
Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com>
---
 drivers/i2c/busses/i2c-stm32f7.c | 26 ++++++++++++++------------
 1 file changed, 14 insertions(+), 12 deletions(-)

diff --git a/drivers/i2c/busses/i2c-stm32f7.c b/drivers/i2c/busses/i2c-stm32f7.c
index 4284fc9..14fb105 100644
--- a/drivers/i2c/busses/i2c-stm32f7.c
+++ b/drivers/i2c/busses/i2c-stm32f7.c
@@ -25,7 +25,6 @@
 #include <linux/module.h>
 #include <linux/of.h>
 #include <linux/of_address.h>
-#include <linux/of_irq.h>
 #include <linux/of_platform.h>
 #include <linux/platform_device.h>
 #include <linux/pinctrl/consumer.h>
@@ -1812,15 +1811,14 @@ static struct i2c_algorithm stm32f7_i2c_algo = {
 
 static int stm32f7_i2c_probe(struct platform_device *pdev)
 {
-	struct device_node *np = pdev->dev.of_node;
 	struct stm32f7_i2c_dev *i2c_dev;
 	const struct stm32f7_i2c_setup *setup;
 	struct resource *res;
-	u32 irq_error, irq_event, clk_rate, rise_time, fall_time;
+	u32 clk_rate, rise_time, fall_time;
 	struct i2c_adapter *adap;
 	struct reset_control *rst;
 	dma_addr_t phy_addr;
-	int ret;
+	int irq_error, irq_event, ret;
 
 	i2c_dev = devm_kzalloc(&pdev->dev, sizeof(*i2c_dev), GFP_KERNEL);
 	if (!i2c_dev)
@@ -1832,16 +1830,20 @@ static int stm32f7_i2c_probe(struct platform_device *pdev)
 		return PTR_ERR(i2c_dev->base);
 	phy_addr = (dma_addr_t)res->start;
 
-	irq_event = irq_of_parse_and_map(np, 0);
-	if (!irq_event) {
-		dev_err(&pdev->dev, "IRQ event missing or invalid\n");
-		return -EINVAL;
+	irq_event = platform_get_irq(pdev, 0);
+	if (irq_event < 0) {
+		if (irq_event != -EPROBE_DEFER)
+			dev_err(&pdev->dev, "Failed to get IRQ event: %d\n",
+				irq_event);
+		return irq_event;
 	}
 
-	irq_error = irq_of_parse_and_map(np, 1);
-	if (!irq_error) {
-		dev_err(&pdev->dev, "IRQ error missing or invalid\n");
-		return -EINVAL;
+	irq_error = platform_get_irq(pdev, 1);
+	if (irq_error < 0) {
+		if (irq_error != -EPROBE_DEFER)
+			dev_err(&pdev->dev, "Failed to get IRQ error: %d\n",
+				irq_error);
+		return irq_error;
 	}
 
 	i2c_dev->clk = devm_clk_get(&pdev->dev, NULL);
-- 
2.7.4


_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

^ permalink raw reply related	[flat|nested] 8+ messages in thread
* Re: [PATCH] i2c: i2c-stm32f7: fix the get_irq error cases
  2019-05-15 15:09 ` Fabrice Gasnier
  (?)
@ 2019-05-16  7:35   ` Pierre Yves MORDRET
  -1 siblings, 0 replies; 8+ messages in thread
From: Pierre Yves MORDRET @ 2019-05-16  7:35 UTC (permalink / raw)
  To: Fabrice Gasnier, wsa
  Cc: mcoquelin.stm32, alexandre.torgue, linux-i2c, linux-stm32,
	linux-arm-kernel, linux-kernel

Hi

Reviewed-by: Pierre-Yves MORDRET <pierre-yves.mordret@st.com>

Thanks
Regards

On 5/15/19 5:09 PM, Fabrice Gasnier wrote:
> During probe, return the "get_irq" error value instead of -EINVAL which
> allows the driver to be deferred probed if needed.
> Fix also the case where of_irq_get() returns a negative value.
> Note :
> On failure of_irq_get() returns 0 or a negative value while
> platform_get_irq() returns a negative value.
> 
> Fixes: aeb068c57214 ("i2c: i2c-stm32f7: add driver")
> 
> Signed-off-by: Fabien Dessenne <fabien.dessenne@st.com>
> Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com>
> ---
>  drivers/i2c/busses/i2c-stm32f7.c | 26 ++++++++++++++------------
>  1 file changed, 14 insertions(+), 12 deletions(-)
> 
> diff --git a/drivers/i2c/busses/i2c-stm32f7.c b/drivers/i2c/busses/i2c-stm32f7.c
> index 4284fc9..14fb105 100644
> --- a/drivers/i2c/busses/i2c-stm32f7.c
> +++ b/drivers/i2c/busses/i2c-stm32f7.c
> @@ -25,7 +25,6 @@
>  #include <linux/module.h>
>  #include <linux/of.h>
>  #include <linux/of_address.h>
> -#include <linux/of_irq.h>
>  #include <linux/of_platform.h>
>  #include <linux/platform_device.h>
>  #include <linux/pinctrl/consumer.h>
> @@ -1812,15 +1811,14 @@ static struct i2c_algorithm stm32f7_i2c_algo = {
>  
>  static int stm32f7_i2c_probe(struct platform_device *pdev)
>  {
> -	struct device_node *np = pdev->dev.of_node;
>  	struct stm32f7_i2c_dev *i2c_dev;
>  	const struct stm32f7_i2c_setup *setup;
>  	struct resource *res;
> -	u32 irq_error, irq_event, clk_rate, rise_time, fall_time;
> +	u32 clk_rate, rise_time, fall_time;
>  	struct i2c_adapter *adap;
>  	struct reset_control *rst;
>  	dma_addr_t phy_addr;
> -	int ret;
> +	int irq_error, irq_event, ret;
>  
>  	i2c_dev = devm_kzalloc(&pdev->dev, sizeof(*i2c_dev), GFP_KERNEL);
>  	if (!i2c_dev)
> @@ -1832,16 +1830,20 @@ static int stm32f7_i2c_probe(struct platform_device *pdev)
>  		return PTR_ERR(i2c_dev->base);
>  	phy_addr = (dma_addr_t)res->start;
>  
> -	irq_event = irq_of_parse_and_map(np, 0);
> -	if (!irq_event) {
> -		dev_err(&pdev->dev, "IRQ event missing or invalid\n");
> -		return -EINVAL;
> +	irq_event = platform_get_irq(pdev, 0);
> +	if (irq_event < 0) {
> +		if (irq_event != -EPROBE_DEFER)
> +			dev_err(&pdev->dev, "Failed to get IRQ event: %d\n",
> +				irq_event);
> +		return irq_event;
>  	}
>  
> -	irq_error = irq_of_parse_and_map(np, 1);
> -	if (!irq_error) {
> -		dev_err(&pdev->dev, "IRQ error missing or invalid\n");
> -		return -EINVAL;
> +	irq_error = platform_get_irq(pdev, 1);
> +	if (irq_error < 0) {
> +		if (irq_error != -EPROBE_DEFER)
> +			dev_err(&pdev->dev, "Failed to get IRQ error: %d\n",
> +				irq_error);
> +		return irq_error;
>  	}
>  
>  	i2c_dev->clk = devm_clk_get(&pdev->dev, NULL);
> 

^ permalink raw reply	[flat|nested] 8+ messages in thread
* Re: [PATCH] i2c: i2c-stm32f7: fix the get_irq error cases
@ 2019-05-16  7:35   ` Pierre Yves MORDRET
  0 siblings, 0 replies; 8+ messages in thread
From: Pierre Yves MORDRET @ 2019-05-16  7:35 UTC (permalink / raw)
  To: Fabrice Gasnier, wsa
  Cc: mcoquelin.stm32, alexandre.torgue, linux-i2c, linux-stm32,
	linux-arm-kernel, linux-kernel

Hi

Reviewed-by: Pierre-Yves MORDRET <pierre-yves.mordret@st.com>

Thanks
Regards

On 5/15/19 5:09 PM, Fabrice Gasnier wrote:
> During probe, return the "get_irq" error value instead of -EINVAL which
> allows the driver to be deferred probed if needed.
> Fix also the case where of_irq_get() returns a negative value.
> Note :
> On failure of_irq_get() returns 0 or a negative value while
> platform_get_irq() returns a negative value.
> 
> Fixes: aeb068c57214 ("i2c: i2c-stm32f7: add driver")
> 
> Signed-off-by: Fabien Dessenne <fabien.dessenne@st.com>
> Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com>
> ---
>  drivers/i2c/busses/i2c-stm32f7.c | 26 ++++++++++++++------------
>  1 file changed, 14 insertions(+), 12 deletions(-)
> 
> diff --git a/drivers/i2c/busses/i2c-stm32f7.c b/drivers/i2c/busses/i2c-stm32f7.c
> index 4284fc9..14fb105 100644
> --- a/drivers/i2c/busses/i2c-stm32f7.c
> +++ b/drivers/i2c/busses/i2c-stm32f7.c
> @@ -25,7 +25,6 @@
>  #include <linux/module.h>
>  #include <linux/of.h>
>  #include <linux/of_address.h>
> -#include <linux/of_irq.h>
>  #include <linux/of_platform.h>
>  #include <linux/platform_device.h>
>  #include <linux/pinctrl/consumer.h>
> @@ -1812,15 +1811,14 @@ static struct i2c_algorithm stm32f7_i2c_algo = {
>  
>  static int stm32f7_i2c_probe(struct platform_device *pdev)
>  {
> -	struct device_node *np = pdev->dev.of_node;
>  	struct stm32f7_i2c_dev *i2c_dev;
>  	const struct stm32f7_i2c_setup *setup;
>  	struct resource *res;
> -	u32 irq_error, irq_event, clk_rate, rise_time, fall_time;
> +	u32 clk_rate, rise_time, fall_time;
>  	struct i2c_adapter *adap;
>  	struct reset_control *rst;
>  	dma_addr_t phy_addr;
> -	int ret;
> +	int irq_error, irq_event, ret;
>  
>  	i2c_dev = devm_kzalloc(&pdev->dev, sizeof(*i2c_dev), GFP_KERNEL);
>  	if (!i2c_dev)
> @@ -1832,16 +1830,20 @@ static int stm32f7_i2c_probe(struct platform_device *pdev)
>  		return PTR_ERR(i2c_dev->base);
>  	phy_addr = (dma_addr_t)res->start;
>  
> -	irq_event = irq_of_parse_and_map(np, 0);
> -	if (!irq_event) {
> -		dev_err(&pdev->dev, "IRQ event missing or invalid\n");
> -		return -EINVAL;
> +	irq_event = platform_get_irq(pdev, 0);
> +	if (irq_event < 0) {
> +		if (irq_event != -EPROBE_DEFER)
> +			dev_err(&pdev->dev, "Failed to get IRQ event: %d\n",
> +				irq_event);
> +		return irq_event;
>  	}
>  
> -	irq_error = irq_of_parse_and_map(np, 1);
> -	if (!irq_error) {
> -		dev_err(&pdev->dev, "IRQ error missing or invalid\n");
> -		return -EINVAL;
> +	irq_error = platform_get_irq(pdev, 1);
> +	if (irq_error < 0) {
> +		if (irq_error != -EPROBE_DEFER)
> +			dev_err(&pdev->dev, "Failed to get IRQ error: %d\n",
> +				irq_error);
> +		return irq_error;
>  	}
>  
>  	i2c_dev->clk = devm_clk_get(&pdev->dev, NULL);
> 

^ permalink raw reply	[flat|nested] 8+ messages in thread
* Re: [PATCH] i2c: i2c-stm32f7: fix the get_irq error cases
@ 2019-05-16  7:35   ` Pierre Yves MORDRET
  0 siblings, 0 replies; 8+ messages in thread
From: Pierre Yves MORDRET @ 2019-05-16  7:35 UTC (permalink / raw)
  To: Fabrice Gasnier, wsa
  Cc: alexandre.torgue, linux-kernel, linux-i2c, mcoquelin.stm32,
	linux-stm32, linux-arm-kernel

Hi

Reviewed-by: Pierre-Yves MORDRET <pierre-yves.mordret@st.com>

Thanks
Regards

On 5/15/19 5:09 PM, Fabrice Gasnier wrote:
> During probe, return the "get_irq" error value instead of -EINVAL which
> allows the driver to be deferred probed if needed.
> Fix also the case where of_irq_get() returns a negative value.
> Note :
> On failure of_irq_get() returns 0 or a negative value while
> platform_get_irq() returns a negative value.
> 
> Fixes: aeb068c57214 ("i2c: i2c-stm32f7: add driver")
> 
> Signed-off-by: Fabien Dessenne <fabien.dessenne@st.com>
> Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com>
> ---
>  drivers/i2c/busses/i2c-stm32f7.c | 26 ++++++++++++++------------
>  1 file changed, 14 insertions(+), 12 deletions(-)
> 
> diff --git a/drivers/i2c/busses/i2c-stm32f7.c b/drivers/i2c/busses/i2c-stm32f7.c
> index 4284fc9..14fb105 100644
> --- a/drivers/i2c/busses/i2c-stm32f7.c
> +++ b/drivers/i2c/busses/i2c-stm32f7.c
> @@ -25,7 +25,6 @@
>  #include <linux/module.h>
>  #include <linux/of.h>
>  #include <linux/of_address.h>
> -#include <linux/of_irq.h>
>  #include <linux/of_platform.h>
>  #include <linux/platform_device.h>
>  #include <linux/pinctrl/consumer.h>
> @@ -1812,15 +1811,14 @@ static struct i2c_algorithm stm32f7_i2c_algo = {
>  
>  static int stm32f7_i2c_probe(struct platform_device *pdev)
>  {
> -	struct device_node *np = pdev->dev.of_node;
>  	struct stm32f7_i2c_dev *i2c_dev;
>  	const struct stm32f7_i2c_setup *setup;
>  	struct resource *res;
> -	u32 irq_error, irq_event, clk_rate, rise_time, fall_time;
> +	u32 clk_rate, rise_time, fall_time;
>  	struct i2c_adapter *adap;
>  	struct reset_control *rst;
>  	dma_addr_t phy_addr;
> -	int ret;
> +	int irq_error, irq_event, ret;
>  
>  	i2c_dev = devm_kzalloc(&pdev->dev, sizeof(*i2c_dev), GFP_KERNEL);
>  	if (!i2c_dev)
> @@ -1832,16 +1830,20 @@ static int stm32f7_i2c_probe(struct platform_device *pdev)
>  		return PTR_ERR(i2c_dev->base);
>  	phy_addr = (dma_addr_t)res->start;
>  
> -	irq_event = irq_of_parse_and_map(np, 0);
> -	if (!irq_event) {
> -		dev_err(&pdev->dev, "IRQ event missing or invalid\n");
> -		return -EINVAL;
> +	irq_event = platform_get_irq(pdev, 0);
> +	if (irq_event < 0) {
> +		if (irq_event != -EPROBE_DEFER)
> +			dev_err(&pdev->dev, "Failed to get IRQ event: %d\n",
> +				irq_event);
> +		return irq_event;
>  	}
>  
> -	irq_error = irq_of_parse_and_map(np, 1);
> -	if (!irq_error) {
> -		dev_err(&pdev->dev, "IRQ error missing or invalid\n");
> -		return -EINVAL;
> +	irq_error = platform_get_irq(pdev, 1);
> +	if (irq_error < 0) {
> +		if (irq_error != -EPROBE_DEFER)
> +			dev_err(&pdev->dev, "Failed to get IRQ error: %d\n",
> +				irq_error);
> +		return irq_error;
>  	}
>  
>  	i2c_dev->clk = devm_clk_get(&pdev->dev, NULL);
> 

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^ permalink raw reply	[flat|nested] 8+ messages in thread
* Re: [PATCH] i2c: i2c-stm32f7: fix the get_irq error cases
  2019-05-15 15:09 ` Fabrice Gasnier
                   ` (2 preceding siblings ...)
  (?)
@ 2019-05-16  9:22 ` Marc Gonzalez
  2019-05-16 13:20   ` Fabrice Gasnier
  -1 siblings, 1 reply; 8+ messages in thread
From: Marc Gonzalez @ 2019-05-16  9:22 UTC (permalink / raw)
  To: Fabrice Gasnier; +Cc: Marc Zyngier, Linux ARM, Wolfram Sang

On 15/05/2019 17:09, Fabrice Gasnier wrote:

> During probe, return the "get_irq" error value instead of -EINVAL which
> allows the driver to be deferred probed if needed.
> Fix also the case where of_irq_get() returns a negative value.
> Note :
> On failure of_irq_get() returns 0 or a negative value while
> platform_get_irq() returns a negative value.
> 
> Fixes: aeb068c57214 ("i2c: i2c-stm32f7: add driver")
> 
> Signed-off-by: Fabien Dessenne <fabien.dessenne@st.com>
> Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com>
> ---
>  drivers/i2c/busses/i2c-stm32f7.c | 26 ++++++++++++++------------
>  1 file changed, 14 insertions(+), 12 deletions(-)
> 
> diff --git a/drivers/i2c/busses/i2c-stm32f7.c b/drivers/i2c/busses/i2c-stm32f7.c
> index 4284fc9..14fb105 100644
> --- a/drivers/i2c/busses/i2c-stm32f7.c
> +++ b/drivers/i2c/busses/i2c-stm32f7.c
> @@ -25,7 +25,6 @@
>  #include <linux/module.h>
>  #include <linux/of.h>
>  #include <linux/of_address.h>
> -#include <linux/of_irq.h>
>  #include <linux/of_platform.h>
>  #include <linux/platform_device.h>
>  #include <linux/pinctrl/consumer.h>
> @@ -1812,15 +1811,14 @@ static struct i2c_algorithm stm32f7_i2c_algo = {
>  
>  static int stm32f7_i2c_probe(struct platform_device *pdev)
>  {
> -	struct device_node *np = pdev->dev.of_node;
>  	struct stm32f7_i2c_dev *i2c_dev;
>  	const struct stm32f7_i2c_setup *setup;
>  	struct resource *res;
> -	u32 irq_error, irq_event, clk_rate, rise_time, fall_time;
> +	u32 clk_rate, rise_time, fall_time;
>  	struct i2c_adapter *adap;
>  	struct reset_control *rst;
>  	dma_addr_t phy_addr;
> -	int ret;
> +	int irq_error, irq_event, ret;
>  
>  	i2c_dev = devm_kzalloc(&pdev->dev, sizeof(*i2c_dev), GFP_KERNEL);
>  	if (!i2c_dev)
> @@ -1832,16 +1830,20 @@ static int stm32f7_i2c_probe(struct platform_device *pdev)
>  		return PTR_ERR(i2c_dev->base);
>  	phy_addr = (dma_addr_t)res->start;
>  
> -	irq_event = irq_of_parse_and_map(np, 0);
> -	if (!irq_event) {
> -		dev_err(&pdev->dev, "IRQ event missing or invalid\n");
> -		return -EINVAL;
> +	irq_event = platform_get_irq(pdev, 0);
> +	if (irq_event < 0) {
> +		if (irq_event != -EPROBE_DEFER)
> +			dev_err(&pdev->dev, "Failed to get IRQ event: %d\n",
> +				irq_event);
> +		return irq_event;
>  	}
>  
> -	irq_error = irq_of_parse_and_map(np, 1);
> -	if (!irq_error) {
> -		dev_err(&pdev->dev, "IRQ error missing or invalid\n");
> -		return -EINVAL;
> +	irq_error = platform_get_irq(pdev, 1);
> +	if (irq_error < 0) {
> +		if (irq_error != -EPROBE_DEFER)
> +			dev_err(&pdev->dev, "Failed to get IRQ error: %d\n",
> +				irq_error);
> +		return irq_error;

As far as I understand, if platform_get_irq() returns 0, that is an error
as well.

https://patchwork.kernel.org/patch/10006651/
https://yarchive.net/comp/linux/zero.html

Regards.

_______________________________________________
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linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

^ permalink raw reply	[flat|nested] 8+ messages in thread
* Re: [PATCH] i2c: i2c-stm32f7: fix the get_irq error cases
  2019-05-16  9:22 ` Marc Gonzalez
@ 2019-05-16 13:20   ` Fabrice Gasnier
  0 siblings, 0 replies; 8+ messages in thread
From: Fabrice Gasnier @ 2019-05-16 13:20 UTC (permalink / raw)
  To: Marc Gonzalez; +Cc: Marc Zyngier, Linux ARM, Wolfram Sang

On 5/16/19 11:22 AM, Marc Gonzalez wrote:
> On 15/05/2019 17:09, Fabrice Gasnier wrote:
> 
>> During probe, return the "get_irq" error value instead of -EINVAL which
>> allows the driver to be deferred probed if needed.
>> Fix also the case where of_irq_get() returns a negative value.
>> Note :
>> On failure of_irq_get() returns 0 or a negative value while
>> platform_get_irq() returns a negative value.
>>
>> Fixes: aeb068c57214 ("i2c: i2c-stm32f7: add driver")
>>
>> Signed-off-by: Fabien Dessenne <fabien.dessenne@st.com>
>> Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com>
>> ---
>>  drivers/i2c/busses/i2c-stm32f7.c | 26 ++++++++++++++------------
>>  1 file changed, 14 insertions(+), 12 deletions(-)
>>
>> diff --git a/drivers/i2c/busses/i2c-stm32f7.c b/drivers/i2c/busses/i2c-stm32f7.c
>> index 4284fc9..14fb105 100644
>> --- a/drivers/i2c/busses/i2c-stm32f7.c
>> +++ b/drivers/i2c/busses/i2c-stm32f7.c
>> @@ -25,7 +25,6 @@
>>  #include <linux/module.h>
>>  #include <linux/of.h>
>>  #include <linux/of_address.h>
>> -#include <linux/of_irq.h>
>>  #include <linux/of_platform.h>
>>  #include <linux/platform_device.h>
>>  #include <linux/pinctrl/consumer.h>
>> @@ -1812,15 +1811,14 @@ static struct i2c_algorithm stm32f7_i2c_algo = {
>>  
>>  static int stm32f7_i2c_probe(struct platform_device *pdev)
>>  {
>> -	struct device_node *np = pdev->dev.of_node;
>>  	struct stm32f7_i2c_dev *i2c_dev;
>>  	const struct stm32f7_i2c_setup *setup;
>>  	struct resource *res;
>> -	u32 irq_error, irq_event, clk_rate, rise_time, fall_time;
>> +	u32 clk_rate, rise_time, fall_time;
>>  	struct i2c_adapter *adap;
>>  	struct reset_control *rst;
>>  	dma_addr_t phy_addr;
>> -	int ret;
>> +	int irq_error, irq_event, ret;
>>  
>>  	i2c_dev = devm_kzalloc(&pdev->dev, sizeof(*i2c_dev), GFP_KERNEL);
>>  	if (!i2c_dev)
>> @@ -1832,16 +1830,20 @@ static int stm32f7_i2c_probe(struct platform_device *pdev)
>>  		return PTR_ERR(i2c_dev->base);
>>  	phy_addr = (dma_addr_t)res->start;
>>  
>> -	irq_event = irq_of_parse_and_map(np, 0);
>> -	if (!irq_event) {
>> -		dev_err(&pdev->dev, "IRQ event missing or invalid\n");
>> -		return -EINVAL;
>> +	irq_event = platform_get_irq(pdev, 0);
>> +	if (irq_event < 0) {
>> +		if (irq_event != -EPROBE_DEFER)
>> +			dev_err(&pdev->dev, "Failed to get IRQ event: %d\n",
>> +				irq_event);
>> +		return irq_event;
>>  	}
>>  
>> -	irq_error = irq_of_parse_and_map(np, 1);
>> -	if (!irq_error) {
>> -		dev_err(&pdev->dev, "IRQ error missing or invalid\n");
>> -		return -EINVAL;
>> +	irq_error = platform_get_irq(pdev, 1);
>> +	if (irq_error < 0) {
>> +		if (irq_error != -EPROBE_DEFER)
>> +			dev_err(&pdev->dev, "Failed to get IRQ error: %d\n",
>> +				irq_error);
>> +		return irq_error;
> 
> As far as I understand, if platform_get_irq() returns 0, that is an error
> as well.
> 
> https://patchwork.kernel.org/patch/10006651/

Hi Marc,

Thanks for pointing this out.
I'll fix it in v2, based on this, e.g. basically:
if (irq <= 0)
	return irq ? irq : -ENODEV;

Best Regards,
Fabrice

> https://yarchive.net/comp/linux/zero.html
> 
> Regards.
> 
> _______________________________________________
> linux-arm-kernel mailing list
> linux-arm-kernel@lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
> 

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^ permalink raw reply	[flat|nested] 8+ messages in thread
end of thread, other threads:[~2019-05-16 13:20 UTC | newest]

Thread overview: 8+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2019-05-15 15:09 [PATCH] i2c: i2c-stm32f7: fix the get_irq error cases Fabrice Gasnier
2019-05-15 15:09 ` Fabrice Gasnier
2019-05-15 15:09 ` Fabrice Gasnier
2019-05-16  7:35 ` Pierre Yves MORDRET
2019-05-16  7:35   ` Pierre Yves MORDRET
2019-05-16  7:35   ` Pierre Yves MORDRET
2019-05-16  9:22 ` Marc Gonzalez
2019-05-16 13:20   ` Fabrice Gasnier

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