49426e9fd2
EDK2 network stack is based on Managed Network Protocol which is layered on top of Simple Management Protocol and does background polling. This polling races with grub for received (and probably trasmitted) packets which causes either serious slowdown or complete failure to load files. Open SNP device exclusively. This destroys all child MNP instances and stops background polling. Exclusive open cannot be done when enumerating cards, as it would destroy PXE information we need to autoconfigure interface; and it cannot be done during autoconfiguration as we need to do it for non-PXE boot as well. So move SNP open to card ->open method and add matching ->close to clean up. Based on patch from Mark Salter <msalter@redhat.com> Also-By: Mark Salter <msalter@redhat.com> Closes: 41731
This is GRUB 2, the second version of the GRand Unified Bootloader. GRUB 2 is rewritten from scratch to make GNU GRUB cleaner, safer, more robust, more powerful, and more portable. See the file NEWS for a description of recent changes to GRUB 2. See the file INSTALL for instructions on how to build and install the GRUB 2 data and program files. Please visit the official web page of GRUB 2, for more information. The URL is <http://www.gnu.org/software/grub/grub.html>. More extensive documentation is available in the Info manual, accessible using 'info grub' after building and installing GRUB 2. Please look at the GRUB Wiki <http://grub.enbug.org> for testing procedures. There are a number of important user-visible differences from the first version of GRUB, now known as GRUB Legacy. For a summary, please see: info grub Introduction 'Changes from GRUB Legacy'