diff mbox series

[3/6] ntb_hw_switchtec: AND with the part_map for a valid tpart_vec

Message ID 20211224012334.89173-4-kelvin.cao@microchip.com (mailing list archive)
State Handled Elsewhere
Delegated to: Bjorn Helgaas
Headers show
Series Switchtec NTB Fixes and Improvements | expand

Commit Message

Kelvin Cao Dec. 24, 2021, 1:23 a.m. UTC 
From: Jeremy Pallotta <jmpallotta@gmail.com>

Some firmware versions return 1 in the target partition vector for
undefined partitions. AND with the part_map to give a valid tpart_vec.

Signed-off-by: Jeremy Pallotta <jmpallotta@gmail.com>
Signed-off-by: Kelvin Cao <kelvin.cao@microchip.com>
---
 drivers/ntb/hw/mscc/ntb_hw_switchtec.c | 1 +
 1 file changed, 1 insertion(+)
diff mbox series

Patch

diff --git a/drivers/ntb/hw/mscc/ntb_hw_switchtec.c b/drivers/ntb/hw/mscc/ntb_hw_switchtec.c
index ec9cb6c81eda..25302a384a7d 100644
--- a/drivers/ntb/hw/mscc/ntb_hw_switchtec.c
+++ b/drivers/ntb/hw/mscc/ntb_hw_switchtec.c
@@ -858,6 +858,7 @@  static int switchtec_ntb_init_sndev(struct switchtec_ntb *sndev)
 	tpart_vec |= ioread32(&sndev->mmio_ntb->ntp_info[self].target_part_low);
 
 	part_map = ioread64(&sndev->mmio_ntb->ep_map);
+	tpart_vec &= part_map;
 	part_map &= ~(1 << sndev->self_partition);
 
 	if (!tpart_vec) {