lspci needs a full path and its different for RHEL and Debian

roles/mellanox_drivers/tasks/main.yml

@@ -2,10 +2,17 @@
 
 - name: "Force this role to fail if no Mellanox hardware is present"
   #Exclude the role via tags ans ansible-playbook --skip-tags mlx
-  shell: "lspci | grep Mellanox"
+  shell: "/usr/sbin/lspci | grep Mellanox"
   check_mode: yes
+  when: ansible_os_family == "RedHat"
+
+
+- name: "Force this role to fail if no Mellanox hardware is present"
+  #Exclude the role via tags ans ansible-playbook --skip-tags mlx
+  shell: "/usr/bin/lspci | grep Mellanox"
+  check_mode: yes
+  when: ansible_os_family == "Debian"
 
-#- include_vars: mellanoxVars.yml
 
 - name: yum install dependencies
   yum:  name=perl,pciutils,gtk2,atk,cairo,gcc-gfortran,libxml2-python,tcsh,libnl,lsof,tcl,tk,kernel-devel,python-devel,createrepo,rpm-build