commitb64a1cbef6upstream. This reverts commitebd43516d3. We should not be sleeping inside spin_lock. Fixes:ebd43516d3("Staging: panel: usleep_range is preferred over udelay") Cc: Sirnam Swetha <theonly.ultimate@gmail.com> Signed-off-by: Sudip Mukherjee <sudip@vectorindia.org> Reported-by: Huang, Ying <ying.huang@intel.com> Tested-by: Huang, Ying <ying.huang@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>