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authorAlistair Popple <alistair@popple.id.au>2017-06-14 14:47:50 +1000
committerMichael Ellerman <mpe@ellerman.id.au>2017-06-14 15:23:19 +1000
commit377aa6b0efbaa29cfeecd8b9244641217f9544ca (patch)
tree298ad8b55f45348c5b17cbdb6f02381e6e4fc157 /arch
parentc6ee9619e2edd9912316f7e2eaf9ffa14fafe9f9 (diff)
downloadlinux-377aa6b0efbaa29cfeecd8b9244641217f9544ca.tar.bz2
powerpc/npu-dma: Remove spurious WARN_ON when a PCI device has no of_node
Commit 4c3b89effc28 ("powerpc/powernv: Add sanity checks to pnv_pci_get_{gpu|npu}_dev") introduced explicit warnings in pnv_pci_get_npu_dev() when a PCIe device has no associated device-tree node. However not all PCIe devices have an of_node and pnv_pci_get_npu_dev() gets indirectly called at least once for every PCIe device in the system. This results in spurious WARN_ON()'s so remove it. The same situation should not exist for pnv_pci_get_gpu_dev() as any NPU based PCIe device requires a device-tree node. Fixes: 4c3b89effc28 ("powerpc/powernv: Add sanity checks to pnv_pci_get_{gpu|npu}_dev") Reported-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Alistair Popple <alistair@popple.id.au> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch')
-rw-r--r--arch/powerpc/platforms/powernv/npu-dma.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/powerpc/platforms/powernv/npu-dma.c b/arch/powerpc/platforms/powernv/npu-dma.c
index 78fa9395b8c5..e6f444b46207 100644
--- a/arch/powerpc/platforms/powernv/npu-dma.c
+++ b/arch/powerpc/platforms/powernv/npu-dma.c
@@ -75,7 +75,8 @@ struct pci_dev *pnv_pci_get_npu_dev(struct pci_dev *gpdev, int index)
if (WARN_ON(!gpdev))
return NULL;
- if (WARN_ON(!gpdev->dev.of_node))
+ /* Not all PCI devices have device-tree nodes */
+ if (!gpdev->dev.of_node)
return NULL;
/* Get assoicated PCI device */