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commitbf72b4b7bbupstream. In vmw_compat_shader_add(), the return value check of vmw_shader_alloc() is not proper. Modify the check for the return pointer 'res'. Found by code review and compiled on ubuntu 20.04. Fixes:18e4a4669c("drm/vmwgfx: Fix compat shader namespace") Cc: stable@vger.kernel.org Signed-off-by: Haoxiang Li <lihaoxiang@isrc.iscas.ac.cn> Signed-off-by: Zack Rusin <zack.rusin@broadcom.com> Link: https://patch.msgid.link/20251224091105.1569464-1-lihaoxiang@isrc.iscas.ac.cn Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>