linux-stable/drivers/firmware
Ard Biesheuvel d1a8d66b91 efi/libstub: Call get_memory_map() to obtain map and desc sizes
This fixes two minor issues in the implementation of get_memory_map():
- Currently, it assumes that sizeof(efi_memory_desc_t) == desc_size,
  which is usually true, but not mandated by the spec. (This was added
  intentionally to allow future additions to the definition of
  efi_memory_desc_t). The way the loop is implemented currently, the
  added slack space may be insufficient if desc_size is larger, which in
  some corner cases could result in the loop never terminating.
- It allocates 32 efi_memory_desc_t entries first (again, using the size
  of the struct instead of desc_size), and frees and reallocates if it
  turns out to be insufficient. Few implementations of UEFI have such small
  memory maps, which results in a unnecessary allocate/free pair on each
  invocation.

Fix this by calling the get_memory_map() boot service first with a '0'
input value for map size to retrieve the map size and desc size from the
firmware and only then perform the allocation, using desc_size rather
than sizeof(efi_memory_desc_t).

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
2015-01-20 22:13:33 +00:00
..
efi efi/libstub: Call get_memory_map() to obtain map and desc sizes 2015-01-20 22:13:33 +00:00
google firmware: google memconsole driver fixes 2014-02-15 11:30:28 -08:00
dcdbas.c initconst: Fix initconst mistake in dcdbas 2014-02-13 18:14:54 -08:00
dcdbas.h
dell_rbu.c sysfs: add struct file* to bin_attr callbacks 2010-05-21 09:37:31 -07:00
dmi-id.c dmi-id: fix a memory leak in dmi_id_init error path 2010-08-05 13:53:34 -07:00
dmi-sysfs.c firmware: dmi-sysfs: Remove "dmi" directory on module exit 2013-12-08 18:23:42 -08:00
dmi_scan.c firmware/dmi_scan: generalize for use by other archs 2014-01-23 16:36:57 -08:00
edd.c [SCSI] edd: Treat "XPRS" host bus type the same as "PCI" 2011-10-31 13:26:19 +04:00
iscsi_ibft.c iscsi_ibft: Fix finding Broadcom specific ibft sign 2014-05-13 14:54:14 -04:00
iscsi_ibft_find.c efi: Make 'efi_enabled' a function to query EFI facilities 2013-01-30 11:51:59 -08:00
Kconfig ACPI and power management updates for 3.14-rc1 2014-01-24 15:51:02 -08:00
Makefile x86/efi: Don't select EFI from certain special ACPI drivers 2013-12-19 21:32:46 +01:00
memmap.c drivers/firmware/memmap.c: don't create memmap sysfs of same firmware_map_entry 2014-10-09 22:26:00 -04:00
pcdp.c pcdp: use early_ioremap/early_iounmap to access pcdp table 2012-07-30 17:25:11 -07:00
pcdp.h Update broken web addresses in the kernel. 2010-10-18 11:03:14 +02:00