Author: Amitoj Kaur Chawla <amitoj1606@gmail.com> debugfs_create_file returns NULL on error so an IS_ERR test is incorrect here and a NULL check is required. The Coccinelle semantic patch used to make this change is as follows: @@ expression e; @@ e = debugfs_create_file(…); if( – IS_ERR(e) + !e ) { } Signed-off-by: Amitoj Kaur Chawla Cc: …