[PATCH RFC net-next 5/5] net: ionic: Set msi_addr_mask to IONIC_ADDR_LEN-bit everywhere

[Vivian Wang]

The code was originally written using no_64bit_msi, which restricts the
device to 32-bit MSI addresses.

Since msi_addr_mask is introduced, use DMA_BIT_MASK(IONIC_ADDR_LEN)
instead of DMA_BIT_MASK(32) here for msi_addr_mask, describing the
restriction more precisely and allowing these devices to work on
platforms with MSI doorbell address above 32-bit space, as long as it is
within the hardware's addressable space.

Also remove #ifdef CONFIG_PPC64 wrapped around it, since this is a
hardware restriction and not a platform one.

Signed-off-by: Vivian Wang <wangruikang@xxxxxxxxxxx>

---

RFC because net-next is closed

pensando maintainers: I don't know if this is the actual restriction,
and do not have any Pensando device to test this. Please help with
checking this.  Thanks.
---
 drivers/net/ethernet/pensando/ionic/ionic_bus_pci.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/pensando/ionic/ionic_bus_pci.c b/drivers/net/ethernet/pensando/ionic/ionic_bus_pci.c
index 0671deae9a28..16133537c535 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_bus_pci.c
+++ b/drivers/net/ethernet/pensando/ionic/ionic_bus_pci.c
@@ -329,10 +329,8 @@ static int ionic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 		goto err_out;
 	}
 
-#ifdef CONFIG_PPC64
 	/* Ensure MSI/MSI-X interrupts lie within addressable physical memory */
-	pdev->msi_addr_mask = DMA_BIT_MASK(32);
-#endif
+	pdev->msi_addr_mask = DMA_BIT_MASK(IONIC_ADDR_LEN);
 
 	err = ionic_setup_one(ionic);
 	if (err)

-- 
2.51.2