Thread (59 messages) flat view 59 messages, 5 authors, 2016-05-12

Re: [PATCH v9 26/26] powerpc/powernv: Exclude root bus in pnv_pci_reset_secondary_bus()

From: Michael Ellerman <mpe@ellerman.id.au>
Date: 2016-05-12 11:35:10

On Thu, 2016-05-12 at 13:48 +1000, Gavin Shan wrote:
On Tue, May 03, 2016 at 03:41:45PM +1000, Gavin Shan wrote:
quoted
The function pnv_pci_reset_secondary_bus() is called like below.
It's impossible for call the function on root bus. So it's safe
to remove the root bus case in the function. No functional changes
introduced.

  pci_parent_bus_reset() / pci_bus_reset() / pci_try_reset_bus()
  pci_reset_bridge_secondary_bus()
  pcibios_reset_secondary_bus()
  pnv_pci_reset_secondary_bus()

Signed-off-by: Gavin Shan <redacted>
Reviewed-by: Daniel Axtens <redacted>
Reviewed-by: Alexey Kardashevskiy <redacted>
---
arch/powerpc/platforms/powernv/eeh-powernv.c | 12 ++----------
1 file changed, 2 insertions(+), 10 deletions(-)
diff --git a/arch/powerpc/platforms/powernv/eeh-powernv.c b/arch/powerpc/platforms/powernv/eeh-powernv.c
index 9226df1..593b8dc 100644
--- a/arch/powerpc/platforms/powernv/eeh-powernv.c
+++ b/arch/powerpc/platforms/powernv/eeh-powernv.c
@@ -868,16 +868,8 @@ static int pnv_eeh_bridge_reset(struct pci_dev *dev, int option)
void pnv_pci_reset_secondary_bus(struct pci_dev *dev)
{
-	struct pci_controller *hose;
-
-	if (pci_is_root_bus(dev->bus)) {
-		hose = pci_bus_to_host(dev->bus);
-		pnv_eeh_root_reset(hose, EEH_RESET_HOT);
-		pnv_eeh_root_reset(hose, EEH_RESET_DEACTIVATE);
-	} else {
-		pnv_eeh_bridge_reset(dev, EEH_RESET_HOT);
-		pnv_eeh_bridge_reset(dev, EEH_RESET_DEACTIVATE);
-	}
+	pnv_eeh_bridge_reset(dev, EEH_RESET_HOT);
+	pnv_eeh_bridge_reset(dev, EEH_RESET_DEACTIVATE);
}
Michael, please revert this one as it is already in linux-ppc-next
branch. Sorry for the overhead.
Done.

https://git.kernel.org/cgit/linux/kernel/git/powerpc/linux.git/commit/?h=next&id=848912e547c4569445a61203a7df402646a88c25

cheers
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