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[PATCHv2,02/20] PCI: Fix faulty logic in pci_reset_bus()

Message ID 20180905203546.21921-3-keith.busch@intel.com (mailing list archive)
State New, archived
Delegated to: Bjorn Helgaas
Headers show
Series PCI, error handling and hot plug | expand

Commit Message

Keith Busch Sept. 5, 2018, 8:35 p.m. UTC 
From: Dennis Dalessandro <dennis.dalessandro@intel.com>

The pci_rest_bus() function calls into pci_probe_reset_slot() to determine
whether to call the slot or bus reset. The check has faulty logic in that
it does not account for pci_probe_reset_slot() being able to return an
errno. Fix by only calling the slot reset when the function returns 0.
Treat < 1 and > 1 the same.

Cc: Sinan Kaya <okaya@codeaurora.org>
Fixes: 811c5cb37df4 ("PCI: Unify try slot and bus reset API")
Reviewed-by: Michael J. Ruhl <michael.j.ruhl@intel.com>
Reviewed-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
---
 drivers/pci/pci.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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Patch

diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index 29ff9619b5fa..30b260332a10 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -5200,7 +5200,7 @@  static int __pci_reset_bus(struct pci_bus *bus)
  */
 int pci_reset_bus(struct pci_dev *pdev)
 {
-	return pci_probe_reset_slot(pdev->slot) ?
+	return (!pci_probe_reset_slot(pdev->slot)) ?
 	    __pci_reset_slot(pdev->slot) : __pci_reset_bus(pdev->bus);
 }
 EXPORT_SYMBOL_GPL(pci_reset_bus);