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authorYunQiang Su <ysu@wavecomp.com>2019-01-08 13:45:10 +0800
committerPaul Burton <paul.burton@mips.com>2019-01-10 10:57:13 -0800
commita214720cbf50cd8c3f76bbb9c3f5c283910e9d33 (patch)
tree81901df2b274ae6008c52d9ec5175a0bcaaf6984 /arch
parent321c46b91550adc03054125fa7a1639390608e1a (diff)
Disable MSI also when pcie-octeon.pcie_disable on
Octeon has an boot-time option to disable pcie. Since MSI depends on PCI-E, we should also disable MSI also with this option is on in order to avoid inadvertently accessing PCIe registers. Signed-off-by: YunQiang Su <ysu@wavecomp.com> Signed-off-by: Paul Burton <paul.burton@mips.com> Cc: pburton@wavecomp.com Cc: linux-mips@vger.kernel.org Cc: aaro.koskinen@iki.fi Cc: stable@vger.kernel.org # v3.3+
Diffstat (limited to 'arch')
-rw-r--r--arch/mips/pci/msi-octeon.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/arch/mips/pci/msi-octeon.c b/arch/mips/pci/msi-octeon.c
index 2a5bb849b10e..288b58b00dc8 100644
--- a/arch/mips/pci/msi-octeon.c
+++ b/arch/mips/pci/msi-octeon.c
@@ -369,7 +369,9 @@ int __init octeon_msi_initialize(void)
int irq;
struct irq_chip *msi;
- if (octeon_dma_bar_type == OCTEON_DMA_BAR_TYPE_PCIE) {
+ if (octeon_dma_bar_type == OCTEON_DMA_BAR_TYPE_INVALID) {
+ return 0;
+ } else if (octeon_dma_bar_type == OCTEON_DMA_BAR_TYPE_PCIE) {
msi_rcv_reg[0] = CVMX_PEXP_NPEI_MSI_RCV0;
msi_rcv_reg[1] = CVMX_PEXP_NPEI_MSI_RCV1;
msi_rcv_reg[2] = CVMX_PEXP_NPEI_MSI_RCV2;