[2/3] ntb_hw_switchtec: Skip unnecessary re-setup of shared memory window for crosslink case
diff mbox series

Message ID 1555944178-1957-3-git-send-email-wesley.sheng@microchip.com
State Accepted
Commit f0f43e766bdb314b3816ac891fb18cea5de4123d
Headers show
  • Redundant steps removal and bug fix of ntb_hw_switchtec
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Commit Message

Wesley Sheng April 22, 2019, 2:42 p.m. UTC
In case of NTB crosslink topology, the setting of shared memory window in
the virtual partition doesn't reset on peer's reboot. So skip the
unnecessary re-setup of shared memory window for that case.

Signed-off-by: Wesley Sheng <wesley.sheng@microchip.com>
Reviewed-by: Logan Gunthorpe <logang@deltatee.com>
 drivers/ntb/hw/mscc/ntb_hw_switchtec.c | 3 +++
 1 file changed, 3 insertions(+)

diff mbox series

diff --git a/drivers/ntb/hw/mscc/ntb_hw_switchtec.c b/drivers/ntb/hw/mscc/ntb_hw_switchtec.c
index 947ed0b..6cf15c18 100644
--- a/drivers/ntb/hw/mscc/ntb_hw_switchtec.c
+++ b/drivers/ntb/hw/mscc/ntb_hw_switchtec.c
@@ -1459,6 +1459,9 @@  static int switchtec_ntb_reinit_peer(struct switchtec_ntb *sndev)
 	int rc;
+	if (crosslink_is_enabled(sndev))
+		return 0;
 	dev_info(&sndev->stdev->dev, "reinitialize shared memory window\n");
 	rc = config_rsvd_lut_win(sndev, sndev->mmio_peer_ctrl, 0,