linux/drivers/firmware
Seiji Aguchi d80a361d77 efi_pstore: Check remaining space with QueryVariableInfo() before writing data
[Issue]

As discussed in a thread below, Running out of space in EFI isn't a well-tested scenario.
And we wouldn't expect all firmware to handle it gracefully.
http://marc.info/?l=linux-kernel&m=134305325801789&w=2

On the other hand, current efi_pstore doesn't check a remaining space of storage at writing time.
Therefore, efi_pstore may not work if it tries to write a large amount of data.

[Patch Description]

To avoid handling the situation above, this patch checks if there is a space enough to log with
QueryVariableInfo() before writing data.

Signed-off-by: Seiji Aguchi <seiji.aguchi@hds.com>
Acked-by: Mike Waychison <mikew@google.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2012-11-26 16:01:46 -08:00
..
google firmware: google: fix gsmi.c build warning 2011-12-09 16:23:49 -08:00
dcdbas.c dcdbas: force SMI to happen when expected 2011-03-02 13:42:10 +01:00
dcdbas.h
dell_rbu.c sysfs: add struct file* to bin_attr callbacks 2010-05-21 09:37:31 -07:00
dmi_scan.c dmi: Feed DMI table to /dev/random driver 2012-07-24 13:16:41 -04:00
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: Fix unaligned memory accesses in dmi-sysfs 2011-02-25 16:10:03 -08:00
edd.c [SCSI] edd: Treat "XPRS" host bus type the same as "PCI" 2011-10-31 13:26:19 +04:00
efivars.c efi_pstore: Check remaining space with QueryVariableInfo() before writing data 2012-11-26 16:01:46 -08:00
iscsi_ibft_find.c ibft: Fix finding IBFT ACPI table on UEFI 2011-12-13 09:08:31 -05:00
iscsi_ibft.c switch ->is_visible() to returning umode_t 2012-01-03 22:54:55 -05:00
Kconfig ASoC: Move SigmaDSP firmware loader to ASoC 2011-11-29 12:01:10 +00:00
Makefile ASoC: Move SigmaDSP firmware loader to ASoC 2011-11-29 12:01:10 +00:00
memmap.c firmware/memmap: avoid type conflicts with the generic memmap_init() 2012-10-19 14:07:47 -07:00
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