diff mbox series

[v5,3/7] PCI: rcar: Fix calculating mask for PCIEPAMR register

Message ID 20200228154122.14164-4-prabhakar.mahadev-lad.rj@bp.renesas.com
State New
Headers show
Series [v5,1/7] PCI: rcar: Rename pcie-rcar.c to pcie-rcar-host.c | expand

Commit Message

Lad, Prabhakar Feb. 28, 2020, 3:41 p.m. UTC
The mask value was calculated incorrectly for PCIEPAMR register if the
size was less than 128 bytes. Fix this issue by adding a check on size.

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
---
 drivers/pci/controller/pcie-rcar.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/drivers/pci/controller/pcie-rcar.c b/drivers/pci/controller/pcie-rcar.c
index 41275f9..90d47b21 100644
--- a/drivers/pci/controller/pcie-rcar.c
+++ b/drivers/pci/controller/pcie-rcar.c
@@ -75,7 +75,10 @@  void rcar_pcie_set_outbound(int win, void __iomem *base,
 	 * keeps things pretty simple.
 	 */
 	size = resource_size(res);
-	mask = (roundup_pow_of_two(size) / SZ_128) - 1;
+	if (size > 128)
+		mask = (roundup_pow_of_two(size) / SZ_128) - 1;
+	else
+		mask = 0x0;
 	rcar_pci_write_reg(base, mask << 7, PCIEPAMR(win));
 
 	if (res->flags & IORESOURCE_IO)