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SubjectRe: [PATCH v2 1/6] platform/x86: serial-multi-instantiate: Improve autodetection
From
Hi,

On 7/9/22 23:16, Andy Shevchenko wrote:
> Instead of calling specific resource counter, let just probe each
> of the type and see what it says. Return -ENOENT if no resources
> found.
>
> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

Thank you for your patch-series, I've applied the series to my
review-hans branch:
https://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86.git/log/?h=review-hans

Note it will show up in my review-hans branch once I've pushed my
local branch there, which might take a while.

Once I've run some tests on this branch the patches there will be
added to the platform-drivers-x86/for-next branch and eventually
will be included in the pdx86 pull-request to Linus for the next
merge-window.

Regards,

Hans



> ---
> v2: squashed patch 1, restored behaviour, added comment, dropped message (Hans)
> .../platform/x86/serial-multi-instantiate.c | 23 ++++++++++++-------
> 1 file changed, 15 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/platform/x86/serial-multi-instantiate.c b/drivers/platform/x86/serial-multi-instantiate.c
> index 1e8063b7c169..366087a9fce2 100644
> --- a/drivers/platform/x86/serial-multi-instantiate.c
> +++ b/drivers/platform/x86/serial-multi-instantiate.c
> @@ -100,7 +100,7 @@ static int smi_spi_probe(struct platform_device *pdev, struct acpi_device *adev,
> if (ret < 0)
> return ret;
> else if (!ret)
> - return -ENODEV;
> + return -ENOENT;
>
> count = ret;
>
> @@ -184,7 +184,7 @@ static int smi_i2c_probe(struct platform_device *pdev, struct acpi_device *adev,
> if (ret < 0)
> return ret;
> else if (!ret)
> - return -ENODEV;
> + return -ENOENT;
>
> count = ret;
>
> @@ -232,6 +232,7 @@ static int smi_probe(struct platform_device *pdev)
> const struct smi_node *node;
> struct acpi_device *adev;
> struct smi *smi;
> + int ret;
>
> adev = ACPI_COMPANION(dev);
> if (!adev)
> @@ -255,15 +256,21 @@ static int smi_probe(struct platform_device *pdev)
> case SMI_SPI:
> return smi_spi_probe(pdev, adev, smi, node->instances);
> case SMI_AUTO_DETECT:
> - if (i2c_acpi_client_count(adev) > 0)
> - return smi_i2c_probe(pdev, adev, smi, node->instances);
> - else
> - return smi_spi_probe(pdev, adev, smi, node->instances);
> + /*
> + * For backwards-compatibility with the existing nodes I2C
> + * is checked first and if such entries are found ONLY I2C
> + * devices are created. Since some existing nodes that were
> + * already handled by this driver could also contain unrelated
> + * SpiSerialBus nodes that were previously ignored, and this
> + * preserves that behavior.
> + */
> + ret = smi_i2c_probe(pdev, adev, smi, node->instances);
> + if (ret != -ENOENT)
> + return ret;
> + return smi_spi_probe(pdev, adev, smi, node->instances);
> default:
> return -EINVAL;
> }
> -
> - return 0; /* never reached */
> }
>
> static int smi_remove(struct platform_device *pdev)

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