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* [PATCH v4 1/2] PCI/ERR: Call pci_bus_reset() before calling ->slot_reset() callback
@ 2020-10-12  5:03 sathyanarayanan.nkuppuswamy
  2020-10-12  5:03 ` [PATCH v4 2/2] PCI/ERR: Split the fatal and non-fatal error recovery handling sathyanarayanan.nkuppuswamy
                   ` (2 more replies)
  0 siblings, 3 replies; 14+ messages in thread
From: sathyanarayanan.nkuppuswamy @ 2020-10-12  5:03 UTC (permalink / raw)
  To: bhelgaas, okaya
  Cc: linux-pci, linux-kernel, ashok.raj, sathyanarayanan.kuppuswamy

From: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>

Currently if report_error_detected() or report_mmio_enabled()
functions requests PCI_ERS_RESULT_NEED_RESET, current
pcie_do_recovery() implementation does not do the requested
explicit device reset, but instead just calls the
report_slot_reset() on all affected devices. Notifying about the
reset via report_slot_reset() without doing the actual device
reset is incorrect. So call pci_bus_reset() before triggering
->slot_reset() callback.

Signed-off-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
---
 drivers/pci/pcie/err.c | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/drivers/pci/pcie/err.c b/drivers/pci/pcie/err.c
index c543f419d8f9..067c58728b88 100644
--- a/drivers/pci/pcie/err.c
+++ b/drivers/pci/pcie/err.c
@@ -181,11 +181,7 @@ pci_ers_result_t pcie_do_recovery(struct pci_dev *dev,
 	}
 
 	if (status == PCI_ERS_RESULT_NEED_RESET) {
-		/*
-		 * TODO: Should call platform-specific
-		 * functions to reset slot before calling
-		 * drivers' slot_reset callbacks?
-		 */
+		pci_reset_bus(dev);
 		status = PCI_ERS_RESULT_RECOVERED;
 		pci_dbg(dev, "broadcast slot_reset message\n");
 		pci_walk_bus(bus, report_slot_reset, &status);
-- 
2.17.1


^ permalink raw reply	[flat|nested] 14+ messages in thread

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Thread overview: 14+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2020-10-12  5:03 [PATCH v4 1/2] PCI/ERR: Call pci_bus_reset() before calling ->slot_reset() callback sathyanarayanan.nkuppuswamy
2020-10-12  5:03 ` [PATCH v4 2/2] PCI/ERR: Split the fatal and non-fatal error recovery handling sathyanarayanan.nkuppuswamy
2020-10-12 14:50   ` Sinan Kaya
2020-10-13 11:56   ` Christoph Hellwig
2020-10-13 15:17     ` Kuppuswamy, Sathyanarayanan
2020-10-15  6:43       ` Christoph Hellwig
2020-10-15  6:49         ` Sathyanarayanan Kuppuswamy Natarajan
2020-10-14  5:44   ` Ethan Zhao
2020-10-14  5:51     ` Kuppuswamy, Sathyanarayanan
2020-10-12 14:51 ` [PATCH v4 1/2] PCI/ERR: Call pci_bus_reset() before calling ->slot_reset() callback Sinan Kaya
2020-10-12 21:05 ` Raj, Ashok
2020-10-12 21:47   ` Kuppuswamy, Sathyanarayanan
2020-10-14  8:00     ` Ethan Zhao
2020-10-14  8:19       ` Kuppuswamy, Sathyanarayanan

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