Commits
Josh Collier committed 07c5ba91240
IB/hfi1: Add debugfs to control expansion ROM write protect Some kernels now enable CONFIG_IO_STRICT_DEVMEM which prevents multiple handles to PCI resource0. In order to continue to support expansion ROM updates while the driver is loaded, the driver must now provide an interface to control the expansion ROM write protection. This patch adds an exprom_wp debugfs interface that allows the hfi1_eprom user tool to disable the expansion ROM write protection by opening the file and writing a '1'. The write protection is released when writing a '0' or automatically re-enabled when the file handle is closed. The current implementation will only allow one handle to be opened at a time across all hfi1 devices. Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com> Signed-off-by: Josh Collier <josh.d.collier@intel.com> Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>