25.05.2020 22:54, Dmitry Osipenko пишет: > The mapping operations of the Tegra SMMU driver are subjected to a race > condition issues because SMMU Address Space isn't allocated and freed > atomically, while it should be. This patch makes the mapping operations > atomic, it fixes an accidentally released Host1x Address Space problem > which happens while running multiple graphics tests in parallel on > Tegra30, i.e. by having multiple threads racing with each other in the > Host1x's submission and completion code paths, performing IOVA mappings > and unmappings in parallel. > > Cc: <stable@xxxxxxxxxxxxxxx> > Signed-off-by: Dmitry Osipenko <digetx@xxxxxxxxx> > --- > > Changelog: > > v2: - Now using mutex instead of spinlock. > > - The _locked postfix is replaced with the underscores prefix. > Hello Thierry and Joerg! Guys, are you okay with the v2 variant? Will be great if we could fix the issue ASAP since it's quite unpleasant. Thanks in advance!
