Commit 35845a78 authored by Gavin Shan's avatar Gavin Shan Committed by Benjamin Herrenschmidt

powerpc/eeh: Can't recover from non-PE-reset case

When PCI_ERS_RESULT_CAN_RECOVER returned from device drivers, the
EEH core should enable I/O and DMA for the affected PE. However,
it was missed to have DMA enabled in eeh_handle_normal_event().
Besides, the frozen state of the affected PE should be cleared
after successful recovery, but we didn't.

The patch fixes both of the issues as above.
Signed-off-by: default avatarGavin Shan <gwshan@linux.vnet.ibm.com>
Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
parent 361f2a2a
...@@ -640,7 +640,6 @@ static void eeh_handle_normal_event(struct eeh_pe *pe) ...@@ -640,7 +640,6 @@ static void eeh_handle_normal_event(struct eeh_pe *pe)
result = PCI_ERS_RESULT_NEED_RESET; result = PCI_ERS_RESULT_NEED_RESET;
} else { } else {
pr_info("EEH: Notify device drivers to resume I/O\n"); pr_info("EEH: Notify device drivers to resume I/O\n");
result = PCI_ERS_RESULT_NONE;
eeh_pe_dev_traverse(pe, eeh_report_mmio_enabled, &result); eeh_pe_dev_traverse(pe, eeh_report_mmio_enabled, &result);
} }
} }
...@@ -652,11 +651,18 @@ static void eeh_handle_normal_event(struct eeh_pe *pe) ...@@ -652,11 +651,18 @@ static void eeh_handle_normal_event(struct eeh_pe *pe)
if (rc < 0) if (rc < 0)
goto hard_fail; goto hard_fail;
if (rc) if (rc) {
result = PCI_ERS_RESULT_NEED_RESET; result = PCI_ERS_RESULT_NEED_RESET;
else } else {
/*
* We didn't do PE reset for the case. The PE
* is still in frozen state. Clear it before
* resuming the PE.
*/
eeh_pe_state_clear(pe, EEH_PE_ISOLATED);
result = PCI_ERS_RESULT_RECOVERED; result = PCI_ERS_RESULT_RECOVERED;
} }
}
/* If any device has a hard failure, then shut off everything. */ /* If any device has a hard failure, then shut off everything. */
if (result == PCI_ERS_RESULT_DISCONNECT) { if (result == PCI_ERS_RESULT_DISCONNECT) {
......
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