diff options
| author | Gavin Shan | 2014-09-30 04:38:52 +0200 |
|---|---|---|
| committer | Michael Ellerman | 2014-09-30 09:15:07 +0200 |
| commit | 0d5ee5205e62908172bf5e1a5fd171ba262fdb75 (patch) | |
| tree | 427ac277b994176d914427ea2cb9a07d06fc4636 /arch/powerpc/kernel | |
| parent | powerpc/eeh: Add eeh_pe_state sysfs entry (diff) | |
| download | kernel-qcow2-linux-0d5ee5205e62908172bf5e1a5fd171ba262fdb75.tar.gz kernel-qcow2-linux-0d5ee5205e62908172bf5e1a5fd171ba262fdb75.tar.xz kernel-qcow2-linux-0d5ee5205e62908172bf5e1a5fd171ba262fdb75.zip | |
powerpc/eeh: Freeze PE before PE reset
The patch adds one more option (EEH_OPT_FREEZE_PE) to set_option()
method to proactively freeze PE, which will be issued before resetting
pass-throughed PE to drop MMIO access during reset because it's
always contributing to recursive EEH error.
Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/kernel')
| -rw-r--r-- | arch/powerpc/kernel/eeh.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/eeh.c b/arch/powerpc/kernel/eeh.c index db35c2722201..633f6bf965c3 100644 --- a/arch/powerpc/kernel/eeh.c +++ b/arch/powerpc/kernel/eeh.c @@ -1382,6 +1382,13 @@ int eeh_pe_reset(struct eeh_pe *pe, int option) break; case EEH_RESET_HOT: case EEH_RESET_FUNDAMENTAL: + /* + * Proactively freeze the PE to drop all MMIO access + * during reset, which should be banned as it's always + * cause recursive EEH error. + */ + eeh_ops->set_option(pe, EEH_OPT_FREEZE_PE); + ret = eeh_ops->reset(pe, option); break; default: |