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SubjectRe: [PATCH] platform/x86: asus-wmi: corrections to egpu safety check


On Mon, Aug 28 2023 at 11:58:51 AM +02:00:00, Hans de Goede
<hdegoede@redhat.com> wrote:
> Hi Luke,
>
> On 8/28/23 01:15, Luke D. Jones wrote:
>> An incorrect if statement was preventing the enablement of the egpu.
>>
>> Fixes: 1bddf53ccac0 ("platform/x86: asus-wmi: don't allow eGPU
>> switching if eGPU not connected")
>> Signed-off-by: Luke D. Jones <luke@ljones.dev>
>
> Not sure which tree/branch this is based on but the commit-id for
> your Fixes:
> is not correct.
>
> in my tree this is commit d49f4d1a30ac (platform/x86: asus-wmi: don't
> allow
> eGPU switching if eGPU not connected") .
>
>
>
>> ---
>> drivers/platform/x86/asus-wmi.c | 15 +++++++--------
>> 1 file changed, 7 insertions(+), 8 deletions(-)
>>
>> diff --git a/drivers/platform/x86/asus-wmi.c
>> b/drivers/platform/x86/asus-wmi.c
>> index 6db2d18a61e0..b51586986450 100644
>> --- a/drivers/platform/x86/asus-wmi.c
>> +++ b/drivers/platform/x86/asus-wmi.c
>> @@ -731,19 +731,18 @@ static ssize_t egpu_enable_store(struct
>> device *dev,
>> return -EINVAL;
>>
>> result = asus_wmi_get_devstate_simple(asus,
>> ASUS_WMI_DEVID_EGPU_CONNECTED);
>
> And this does not apply, because the:
>
> result = asus_wmi_get_devstate_simple()
>
> you have here has been fixed in my tree to be
>
> err = asus_wmi_get_devstate_simple()
>

Fixed.

> to match the error checks below which actually check "err" not
> "result"
> I guess that a fix for this being squashed into my tree is also what
> has resulted in the different commit ids.
>
> Please rebase on top of:
>
> https://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86.git/log/?h=for-next
>
> and submit a new version.
>
> And please also Cc: platform-driver-x86@vger.kernel.org for the next
> version.

Thank you for the review Hans.

>
>> - if (err < 0)
>> - return err;
>> - if (err < 1) {
>> - err = -ENODEV;
>> - pr_warn("Failed to set egpu disable: %d\n", err);
>> + if (err < 0) {
>> + pr_warn("Failed to get egpu connection status: %d\n", err);
>> return err;
>> }
>>
>> if (asus->gpu_mux_mode_available) {
>> result = asus_wmi_get_devstate_simple(asus,
>> ASUS_WMI_DEVID_GPU_MUX);
>> - if (result < 0)
>> + if (result < 0) {
>> /* An error here may signal greater failure of GPU handling */
>> + pr_warn("Failed to get gpu mux status: %d\n", err);
>> return result;
>> + }
>> if (!result && enable) {
>> err = -ENODEV;
>> pr_warn("Can not enable eGPU when the MUX is in dGPU mode:
>> %d\n", err);
>> @@ -753,12 +752,12 @@ static ssize_t egpu_enable_store(struct
>> device *dev,
>>
>> err = asus_wmi_set_devstate(ASUS_WMI_DEVID_EGPU, enable, &result);
>> if (err) {
>> - pr_warn("Failed to set egpu disable: %d\n", err);
>> + pr_warn("Failed to set egpu state: %d\n", err);
>> return err;
>> }
>>
>> if (result > 1) {
>> - pr_warn("Failed to set egpu disable (retval): 0x%x\n", result);
>> + pr_warn("Failed to set egpu state (retval): 0x%x\n", result);
>> return -EIO;
>> }
>>
>


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