Re: [PATCH 0/5] MR355: win32u: Move more display mode logic out of graphics drivers.

[Zhiyi Zhang (＠zhiyi)]

Zhiyi Zhang (@zhiyi) commented about dlls/winex11.drv/display.c:
> return FALSE;
>      }
>
> -    memcpy(devmode, (BYTE *)cached_modes + (sizeof(*cached_modes) + cached_modes[0].dmDriverExtra) * n, sizeof(*devmode));
> +    mode = *(DEVMODEW *)((BYTE *)cached_modes + (sizeof(*cached_modes) + cached_modes[0].dmDriverExtra) * n);
>      pthread_mutex_unlock( &settings_mutex );
>
> -done:
> -    /* Set generic fields */
> -    devmode->dmSize = FIELD_OFFSET(DEVMODEW, dmICMMethod);
> -    devmode->dmDriverExtra = 0;
> -    devmode->dmSpecVersion = DM_SPECVERSION;
> -    devmode->dmDriverVersion = DM_SPECVERSION;
> -    lstrcpyW(devmode->dmDeviceName, dev_name);
> +    memcpy( &devmode->dmFields, &mode.dmFields, devmode->dmSize - offsetof(DEVMODEW, dmFields) );
>      return TRUE;

You should move this memcpy() before pthread_mutex_unlock().

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https://gitlab.winehq.org/wine/wine/-/merge_requests/355#note_3092