The function eeh_pe_reset_and_recover() is used to recover EEH
error when the passthrough device are transferred to guest and
backwards, meaning the device's driver is vfio-pci or none.
When the driver is vfio-pci that provides error_detected() error
handler only, the handler simply stops the guest and it's not
expected behaviour. On the other hand, no error handlers will
be called if we don't have a bound driver.
This ignores all error handlers provided by device driver in
eeh_pe_reset_and_recover() to avoid the exceptional behaviour.
Fixes: 5cfb20b9 ("powerpc/eeh: Emulate EEH recovery for VFIO devices")
Cc: sta...@vger.kernel.org #v3.18+
Signed-off-by: Gavin Shan <gws...@linux.vnet.ibm.com>
Reviewed-by: Russell Currey <rus...@russell.cc>
---
arch/powerpc/kernel/eeh_driver.c | 11 +----------
1 file changed, 1 insertion(+), 10 deletions(-)
diff --git a/arch/powerpc/kernel/eeh_driver.c b/arch/powerpc/kernel/eeh_driver.c
index fb6207d..1c7d703 100644
--- a/arch/powerpc/kernel/eeh_driver.c
+++ b/arch/powerpc/kernel/eeh_driver.c
@@ -552,7 +552,7 @@ static int eeh_clear_pe_frozen_state(struct eeh_pe *pe,
int eeh_pe_reset_and_recover(struct eeh_pe *pe)
{
- int result, ret;
+ int ret;
/* Bail if the PE is being recovered */
if (pe->state & EEH_PE_RECOVERING)
@@ -564,9 +564,6 @@ int eeh_pe_reset_and_recover(struct eeh_pe *pe)
/* Save states */
eeh_pe_dev_traverse(pe, eeh_dev_save_state, NULL);
- /* Report error */
- eeh_pe_dev_traverse(pe, eeh_report_error, &result);
-
/* Issue reset */
ret = eeh_reset_pe(pe);
if (ret) {
@@ -581,15 +578,9 @@ int eeh_pe_reset_and_recover(struct eeh_pe *pe)
return ret;
}
- /* Notify completion of reset */
- eeh_pe_dev_traverse(pe, eeh_report_reset, &result);
-
/* Restore device state */
eeh_pe_dev_traverse(pe, eeh_dev_restore_state, NULL);
- /* Resume */
- eeh_pe_dev_traverse(pe, eeh_report_resume, NULL);
-
/* Clear recovery mode */
eeh_pe_state_clear(pe, EEH_PE_RECOVERING);
--
2.1.0
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