Hi; I have written a driver based on DRM and created equivalent .ko file. The file I insmod are drm.ko, drm_kms_helper.ko and mydrm.ko. It calls my probe function and loads mydrm.ko, and also creates card0 in /dev folder. In user space I call the function ret = drmAvailable(). The result is as follows: It seems it calls preclose because drmAvailable calls close(fd) before exiting. drmAvailable also send the Version IOCTL to DRM. In My case it returns the error number of 0x19 = 25, which corresponds to ENOTTY. Please suggest me how to remove this error and make the ioctls successful. ++++drm_release +++++Shailendra: drm_platform_preclose -- Called +++ Shailendra: drm_platform_lastclose -- Called drmOpenDevice: buf = /dev/dri/card0 --drmOpenDevice: open result is 5, (OK) drmOpenDevice will return now with fd = 0x5 drmAvailable - before calling drmGetVersion API: drmGetVersion DRM_IOCTL_VERSION = 0xc0246400 drmIoctl fd = 0x5 request = 0xc0246400 errno = 0x19 Thanks and Regards Shailendra
