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-rw-r--r--arch/powerpc/platforms/powernv/eeh-powernv.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/powernv/eeh-powernv.c b/arch/powerpc/platforms/powernv/eeh-powernv.c
index 6fb5522acd70..d2f19821d71d 100644
--- a/arch/powerpc/platforms/powernv/eeh-powernv.c
+++ b/arch/powerpc/platforms/powernv/eeh-powernv.c
@@ -1102,6 +1102,13 @@ static int pnv_eeh_reset(struct eeh_pe *pe, int option)
return -EIO;
}
+ /*
+ * If dealing with the root bus (or the bus underneath the
+ * root port), we reset the bus underneath the root port.
+ *
+ * The cxl driver depends on this behaviour for bi-modal card
+ * switching.
+ */
if (pci_is_root_bus(bus) ||
pci_is_root_bus(bus->parent))
return pnv_eeh_root_reset(hose, option);