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(parent: 5ba6e29) | patch
efivarfs: Implement exclusive access for {get,set}_variable
authorJeremy Kerr <jeremy.kerr@canonical.com>
Thu, 11 Oct 2012 13:19:11 +0000 (21:19 +0800)
committerMatt Fleming <matt.fleming@intel.com>
Tue, 30 Oct 2012 10:39:24 +0000 (10:39 +0000)
commitf5f6a60ad52fc786c517303590f1efaea614c69b
treebb8d8ed9304fea80c240273406385a4e04c2182ftree | snapshot
parent5ba6e2919b9e18a051e5bdd6c21f52ee4976513fcommit | diff
efivarfs: Implement exclusive access for {get,set}_variable

Currently, efivarfs does not enforce exclusion over the get_variable and
set_variable operations. Section 7.1 of UEFI requires us to only allow a
single processor to enter {get,set}_variable services at once.

This change acquires the efivars->lock over calls to these operations
from the efivarfs paths.

Signed-off-by: Jeremy Kerr <jeremy.kerr@canonical.com>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
drivers/firmware/efivars.c diff | blob | history
Domain: System / Uncategorized;