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SubjectRe: [PATCH] i2c: i2c-stm32f7: fix the get_irq error cases
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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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