diff mbox series

[v2,3/4] net: ethernet: ti: am65-cpsw: Restore ALE only if any interface was up

Message ID 20221121142300.9320-4-rogerq@kernel.org (mailing list archive)
State Superseded
Delegated to: Netdev Maintainers
Headers show
Series net: ethernet: ti: am65-cpsw: Fix set channel operation | expand

Checks

Context Check Description
netdev/tree_selection success Guessed tree name to be net-next
netdev/fixes_present success Fixes tag not required for -next series
netdev/subject_prefix warning Target tree name not specified in the subject
netdev/cover_letter success Series has a cover letter
netdev/patch_count success Link
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 0 this patch: 0
netdev/cc_maintainers warning 1 maintainers not CCed: s-vadapalli@ti.com
netdev/build_clang success Errors and warnings before: 0 this patch: 0
netdev/module_param success Was 0 now: 0
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success Fixes tag looks correct
netdev/build_allmodconfig_warn success Errors and warnings before: 0 this patch: 0
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 23 lines checked
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0

Commit Message

Roger Quadros Nov. 21, 2022, 2:22 p.m. UTC 
There is no point in restoring ALE if all interfaces were down
prior to suspend as ALE will be cleared when any interface is
brought up.

So restore ALE only if any interface was up before system suspended.

Fixes: 1af3cb3702d0 ("net: ethernet: ti: am65-cpsw: Fix hardware switch mode on suspend/resume")
Signed-off-by: Roger Quadros <rogerq@kernel.org>
---
 drivers/net/ethernet/ti/am65-cpsw-nuss.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/drivers/net/ethernet/ti/am65-cpsw-nuss.c b/drivers/net/ethernet/ti/am65-cpsw-nuss.c
index 2acde5b14516..dda9afe5410c 100644
--- a/drivers/net/ethernet/ti/am65-cpsw-nuss.c
+++ b/drivers/net/ethernet/ti/am65-cpsw-nuss.c
@@ -2935,6 +2935,7 @@  static int am65_cpsw_nuss_resume(struct device *dev)
 	struct net_device *ndev;
 	int i, ret;
 	struct am65_cpsw_host *host_p = am65_common_get_host(common);
+	bool need_ale_restore = false;
 
 	ret = am65_cpsw_nuss_init_tx_chns(common);
 	if (ret)
@@ -2957,6 +2958,7 @@  static int am65_cpsw_nuss_resume(struct device *dev)
 			continue;
 
 		if (netif_running(ndev)) {
+			need_ale_restore = true;
 			rtnl_lock();
 			ret = am65_cpsw_nuss_ndo_slave_open(ndev);
 			rtnl_unlock();
@@ -2971,7 +2973,8 @@  static int am65_cpsw_nuss_resume(struct device *dev)
 	}
 
 	writel(host_p->vid_context, host_p->port_base + AM65_CPSW_PORT_VLAN_REG_OFFSET);
-	cpsw_ale_restore(common->ale, common->ale_context);
+	if (need_ale_restore)
+		cpsw_ale_restore(common->ale, common->ale_context);
 
 	return 0;
 }