* [PATCH net-next v2 0/2] rswitch: Add PM ops
@ 2023-10-13 12:19 Yoshihiro Shimoda
2023-10-13 12:19 ` [PATCH net-next v2 1/2] rswitch: Use unsigned int for array index Yoshihiro Shimoda
2023-10-13 12:19 ` [PATCH net-next v2 2/2] rswitch: Add PM ops Yoshihiro Shimoda
0 siblings, 2 replies; 5+ messages in thread
From: Yoshihiro Shimoda @ 2023-10-13 12:19 UTC (permalink / raw)
To: s.shtylyov, davem, edumazet, kuba, pabeni
Cc: netdev, linux-renesas-soc, Yoshihiro Shimoda
This patch is based on the latest net-next.git / next branch.
After applied this patch with the following patches, the system can
enter/exit Suspend to Idle without any error:
https://git.kernel.org/pub/scm/linux/kernel/git/phy/linux-phy.git/commit/?h=next&id=aa4c0bbf820ddb9dd8105a403aa12df57b9e5129
https://git.kernel.org/pub/scm/linux/kernel/git/phy/linux-phy.git/commit/?h=next&id=1a5361189b7acac15b9b086b2300a11b7aa84c06
Changes from v1:
https://lore.kernel.org/all/20231012121618.267315-1-yoshihiro.shimoda.uh@renesas.com/
- Based on the latest net-next.git / main branch. So, the following patches
are already merged.
https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/?id=510b18cf23b9bd8a982ef7f1fb19f3968a2bf787
https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/?id=053f13f67be6d02781730c9ac71abde6e9140610
- Add a new patch to use unsigned int for array index in the patch 1/2.
- Use unsigned int for array index in the patch 2/2.
- Use DEFINE_SIMPLE_DEV_PM_OPS() and drop __maybe_unused tags in the patch 2/2.
- Use pm_sleep_ptr() in the patch 2/2.
Yoshihiro Shimoda (2):
rswitch: Use unsigned int for array index
rswitch: Add PM ops
drivers/net/ethernet/renesas/rswitch.c | 51 ++++++++++++++++++++++++--
drivers/net/ethernet/renesas/rswitch.h | 2 +-
2 files changed, 49 insertions(+), 4 deletions(-)
--
2.25.1
^ permalink raw reply [flat|nested] 5+ messages in thread
* [PATCH net-next v2 1/2] rswitch: Use unsigned int for array index
2023-10-13 12:19 [PATCH net-next v2 0/2] rswitch: Add PM ops Yoshihiro Shimoda
@ 2023-10-13 12:19 ` Yoshihiro Shimoda
2023-10-16 19:56 ` Simon Horman
2023-10-13 12:19 ` [PATCH net-next v2 2/2] rswitch: Add PM ops Yoshihiro Shimoda
1 sibling, 1 reply; 5+ messages in thread
From: Yoshihiro Shimoda @ 2023-10-13 12:19 UTC (permalink / raw)
To: s.shtylyov, davem, edumazet, kuba, pabeni
Cc: netdev, linux-renesas-soc, Yoshihiro Shimoda
The array index should not be negative, so modify the condition of
rswitch_for_each_enabled_port_continue_reverse() macro, and then
use unsigned int instead.
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
---
drivers/net/ethernet/renesas/rswitch.c | 8 +++++---
drivers/net/ethernet/renesas/rswitch.h | 2 +-
2 files changed, 6 insertions(+), 4 deletions(-)
diff --git a/drivers/net/ethernet/renesas/rswitch.c b/drivers/net/ethernet/renesas/rswitch.c
index 112e605f104a..7640144db79b 100644
--- a/drivers/net/ethernet/renesas/rswitch.c
+++ b/drivers/net/ethernet/renesas/rswitch.c
@@ -1405,7 +1405,8 @@ static void rswitch_ether_port_deinit_one(struct rswitch_device *rdev)
static int rswitch_ether_port_init_all(struct rswitch_private *priv)
{
- int i, err;
+ unsigned int i;
+ int err;
rswitch_for_each_enabled_port(priv, i) {
err = rswitch_ether_port_init_one(priv->rdev[i]);
@@ -1786,7 +1787,8 @@ static void rswitch_device_free(struct rswitch_private *priv, int index)
static int rswitch_init(struct rswitch_private *priv)
{
- int i, err;
+ unsigned int i;
+ int err;
for (i = 0; i < RSWITCH_NUM_PORTS; i++)
rswitch_etha_init(priv, i);
@@ -1959,7 +1961,7 @@ static int renesas_eth_sw_probe(struct platform_device *pdev)
static void rswitch_deinit(struct rswitch_private *priv)
{
- int i;
+ unsigned int i;
rswitch_gwca_hw_deinit(priv);
rcar_gen4_ptp_unregister(priv->ptp_priv);
diff --git a/drivers/net/ethernet/renesas/rswitch.h b/drivers/net/ethernet/renesas/rswitch.h
index 04f49a7a5843..27c9d3872c0e 100644
--- a/drivers/net/ethernet/renesas/rswitch.h
+++ b/drivers/net/ethernet/renesas/rswitch.h
@@ -20,7 +20,7 @@
else
#define rswitch_for_each_enabled_port_continue_reverse(priv, i) \
- for (i--; i >= 0; i--) \
+ for (; i-- > 0; ) \
if (priv->rdev[i]->disabled) \
continue; \
else
--
2.25.1
^ permalink raw reply related [flat|nested] 5+ messages in thread
* [PATCH net-next v2 2/2] rswitch: Add PM ops
2023-10-13 12:19 [PATCH net-next v2 0/2] rswitch: Add PM ops Yoshihiro Shimoda
2023-10-13 12:19 ` [PATCH net-next v2 1/2] rswitch: Use unsigned int for array index Yoshihiro Shimoda
@ 2023-10-13 12:19 ` Yoshihiro Shimoda
1 sibling, 0 replies; 5+ messages in thread
From: Yoshihiro Shimoda @ 2023-10-13 12:19 UTC (permalink / raw)
To: s.shtylyov, davem, edumazet, kuba, pabeni
Cc: netdev, linux-renesas-soc, Yoshihiro Shimoda
Add PM ops for Suspend to Idle. When the system suspended,
the Ethernet Serdes's clock will be stopped. So, this driver needs
to re-initialize the Ethernet Serdes by phy_init() in
renesas_eth_sw_resume(). Otherwise, timeout happened in phy_power_on().
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
---
drivers/net/ethernet/renesas/rswitch.c | 43 ++++++++++++++++++++++++++
1 file changed, 43 insertions(+)
diff --git a/drivers/net/ethernet/renesas/rswitch.c b/drivers/net/ethernet/renesas/rswitch.c
index 7640144db79b..34b7ce6b771e 100644
--- a/drivers/net/ethernet/renesas/rswitch.c
+++ b/drivers/net/ethernet/renesas/rswitch.c
@@ -17,6 +17,7 @@
#include <linux/of_net.h>
#include <linux/phy/phy.h>
#include <linux/platform_device.h>
+#include <linux/pm.h>
#include <linux/pm_runtime.h>
#include <linux/rtnetlink.h>
#include <linux/slab.h>
@@ -1315,6 +1316,7 @@ static int rswitch_phy_device_init(struct rswitch_device *rdev)
if (!phydev)
goto out;
__set_bit(rdev->etha->phy_interface, phydev->host_interfaces);
+ phydev->mac_managed_pm = true;
phydev = of_phy_connect(rdev->ndev, phy, rswitch_adjust_link, 0,
rdev->etha->phy_interface);
@@ -1995,11 +1997,52 @@ static void renesas_eth_sw_remove(struct platform_device *pdev)
platform_set_drvdata(pdev, NULL);
}
+static int renesas_eth_sw_suspend(struct device *dev)
+{
+ struct rswitch_private *priv = dev_get_drvdata(dev);
+ struct net_device *ndev;
+ unsigned int i;
+
+ rswitch_for_each_enabled_port(priv, i) {
+ ndev = priv->rdev[i]->ndev;
+ if (netif_running(ndev)) {
+ netif_device_detach(ndev);
+ rswitch_stop(ndev);
+ }
+ if (priv->rdev[i]->serdes->init_count)
+ phy_exit(priv->rdev[i]->serdes);
+ }
+
+ return 0;
+}
+
+static int renesas_eth_sw_resume(struct device *dev)
+{
+ struct rswitch_private *priv = dev_get_drvdata(dev);
+ struct net_device *ndev;
+ unsigned int i;
+
+ rswitch_for_each_enabled_port(priv, i) {
+ phy_init(priv->rdev[i]->serdes);
+ ndev = priv->rdev[i]->ndev;
+ if (netif_running(ndev)) {
+ rswitch_open(ndev);
+ netif_device_attach(ndev);
+ }
+ }
+
+ return 0;
+}
+
+static DEFINE_SIMPLE_DEV_PM_OPS(renesas_eth_sw_pm_ops, renesas_eth_sw_suspend,
+ renesas_eth_sw_resume);
+
static struct platform_driver renesas_eth_sw_driver_platform = {
.probe = renesas_eth_sw_probe,
.remove_new = renesas_eth_sw_remove,
.driver = {
.name = "renesas_eth_sw",
+ .pm = pm_sleep_ptr(&renesas_eth_sw_pm_ops),
.of_match_table = renesas_eth_sw_of_table,
}
};
--
2.25.1
^ permalink raw reply related [flat|nested] 5+ messages in thread
* Re: [PATCH net-next v2 1/2] rswitch: Use unsigned int for array index
2023-10-13 12:19 ` [PATCH net-next v2 1/2] rswitch: Use unsigned int for array index Yoshihiro Shimoda
@ 2023-10-16 19:56 ` Simon Horman
2023-10-17 1:54 ` Yoshihiro Shimoda
0 siblings, 1 reply; 5+ messages in thread
From: Simon Horman @ 2023-10-16 19:56 UTC (permalink / raw)
To: Yoshihiro Shimoda
Cc: s.shtylyov, davem, edumazet, kuba, pabeni, netdev,
linux-renesas-soc, Geert Uytterhoeven
+ Geert Uytterhoeven
On Fri, Oct 13, 2023 at 09:19:35PM +0900, Yoshihiro Shimoda wrote:
> The array index should not be negative, so modify the condition of
> rswitch_for_each_enabled_port_continue_reverse() macro, and then
> use unsigned int instead.
>
> Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
> ---
> drivers/net/ethernet/renesas/rswitch.c | 8 +++++---
> drivers/net/ethernet/renesas/rswitch.h | 2 +-
> 2 files changed, 6 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/net/ethernet/renesas/rswitch.c b/drivers/net/ethernet/renesas/rswitch.c
> index 112e605f104a..7640144db79b 100644
> --- a/drivers/net/ethernet/renesas/rswitch.c
> +++ b/drivers/net/ethernet/renesas/rswitch.c
> @@ -1405,7 +1405,8 @@ static void rswitch_ether_port_deinit_one(struct rswitch_device *rdev)
>
> static int rswitch_ether_port_init_all(struct rswitch_private *priv)
> {
> - int i, err;
> + unsigned int i;
> + int err;
>
> rswitch_for_each_enabled_port(priv, i) {
> err = rswitch_ether_port_init_one(priv->rdev[i]);
> @@ -1786,7 +1787,8 @@ static void rswitch_device_free(struct rswitch_private *priv, int index)
>
> static int rswitch_init(struct rswitch_private *priv)
> {
> - int i, err;
> + unsigned int i;
> + int err;
>
> for (i = 0; i < RSWITCH_NUM_PORTS; i++)
> rswitch_etha_init(priv, i);
Hi Shimoda-san,
Immediately below this hunk, the following code appears.
if (err < 0) {
for (i--; i >= 0; i--)
rswitch_device_free(priv, i);
goto err_device_alloc;
}
I suspect that the for loop should be updated in a similar way to
that in rswitch_for_each_enabled_port_continue_reverse as,
now that i is unsigned, i >= 0 will always be true.
As flagged by Smatch and Coccinelle.
Otherwise this patch-set looks good to me.
> @@ -1959,7 +1961,7 @@ static int renesas_eth_sw_probe(struct platform_device *pdev)
>
> static void rswitch_deinit(struct rswitch_private *priv)
> {
> - int i;
> + unsigned int i;
>
> rswitch_gwca_hw_deinit(priv);
> rcar_gen4_ptp_unregister(priv->ptp_priv);
> diff --git a/drivers/net/ethernet/renesas/rswitch.h b/drivers/net/ethernet/renesas/rswitch.h
> index 04f49a7a5843..27c9d3872c0e 100644
> --- a/drivers/net/ethernet/renesas/rswitch.h
> +++ b/drivers/net/ethernet/renesas/rswitch.h
> @@ -20,7 +20,7 @@
> else
>
> #define rswitch_for_each_enabled_port_continue_reverse(priv, i) \
> - for (i--; i >= 0; i--) \
> + for (; i-- > 0; ) \
> if (priv->rdev[i]->disabled) \
> continue; \
> else
--
pw-bot: changes-requested
^ permalink raw reply [flat|nested] 5+ messages in thread
* RE: [PATCH net-next v2 1/2] rswitch: Use unsigned int for array index
2023-10-16 19:56 ` Simon Horman
@ 2023-10-17 1:54 ` Yoshihiro Shimoda
0 siblings, 0 replies; 5+ messages in thread
From: Yoshihiro Shimoda @ 2023-10-17 1:54 UTC (permalink / raw)
To: Simon Horman
Cc: s.shtylyov, davem, edumazet, kuba, pabeni, netdev,
linux-renesas-soc, Geert Uytterhoeven
Hi Simon-san,
> From: Simon Horman, Sent: Tuesday, October 17, 2023 4:56 AM
>
> + Geert Uytterhoeven
>
> On Fri, Oct 13, 2023 at 09:19:35PM +0900, Yoshihiro Shimoda wrote:
> > The array index should not be negative, so modify the condition of
> > rswitch_for_each_enabled_port_continue_reverse() macro, and then
> > use unsigned int instead.
> >
> > Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
> > ---
> > drivers/net/ethernet/renesas/rswitch.c | 8 +++++---
> > drivers/net/ethernet/renesas/rswitch.h | 2 +-
> > 2 files changed, 6 insertions(+), 4 deletions(-)
> >
> > diff --git a/drivers/net/ethernet/renesas/rswitch.c b/drivers/net/ethernet/renesas/rswitch.c
> > index 112e605f104a..7640144db79b 100644
> > --- a/drivers/net/ethernet/renesas/rswitch.c
> > +++ b/drivers/net/ethernet/renesas/rswitch.c
> > @@ -1405,7 +1405,8 @@ static void rswitch_ether_port_deinit_one(struct rswitch_device *rdev)
> >
> > static int rswitch_ether_port_init_all(struct rswitch_private *priv)
> > {
> > - int i, err;
> > + unsigned int i;
> > + int err;
> >
> > rswitch_for_each_enabled_port(priv, i) {
> > err = rswitch_ether_port_init_one(priv->rdev[i]);
> > @@ -1786,7 +1787,8 @@ static void rswitch_device_free(struct rswitch_private *priv, int index)
> >
> > static int rswitch_init(struct rswitch_private *priv)
> > {
> > - int i, err;
> > + unsigned int i;
> > + int err;
> >
> > for (i = 0; i < RSWITCH_NUM_PORTS; i++)
> > rswitch_etha_init(priv, i);
>
> Hi Shimoda-san,
>
> Immediately below this hunk, the following code appears.
>
> if (err < 0) {
> for (i--; i >= 0; i--)
> rswitch_device_free(priv, i);
> goto err_device_alloc;
> }
>
> I suspect that the for loop should be updated in a similar way to
> that in rswitch_for_each_enabled_port_continue_reverse as,
> now that i is unsigned, i >= 0 will always be true.
>
> As flagged by Smatch and Coccinelle.
Thank you for your comment! I should have checked the patch-set by such tools...
Anyway, I'll submit v3 patches.
> Otherwise this patch-set looks good to me.
Thank you for your review!
Best regards,
Yoshihiro Shimoda
> > @@ -1959,7 +1961,7 @@ static int renesas_eth_sw_probe(struct platform_device *pdev)
> >
> > static void rswitch_deinit(struct rswitch_private *priv)
> > {
> > - int i;
> > + unsigned int i;
> >
> > rswitch_gwca_hw_deinit(priv);
> > rcar_gen4_ptp_unregister(priv->ptp_priv);
> > diff --git a/drivers/net/ethernet/renesas/rswitch.h b/drivers/net/ethernet/renesas/rswitch.h
> > index 04f49a7a5843..27c9d3872c0e 100644
> > --- a/drivers/net/ethernet/renesas/rswitch.h
> > +++ b/drivers/net/ethernet/renesas/rswitch.h
> > @@ -20,7 +20,7 @@
> > else
> >
> > #define rswitch_for_each_enabled_port_continue_reverse(priv, i) \
> > - for (i--; i >= 0; i--) \
> > + for (; i-- > 0; ) \
> > if (priv->rdev[i]->disabled) \
> > continue; \
> > else
>
> --
> pw-bot: changes-requested
^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2023-10-17 1:54 UTC | newest]
Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed)
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2023-10-13 12:19 [PATCH net-next v2 0/2] rswitch: Add PM ops Yoshihiro Shimoda
2023-10-13 12:19 ` [PATCH net-next v2 1/2] rswitch: Use unsigned int for array index Yoshihiro Shimoda
2023-10-16 19:56 ` Simon Horman
2023-10-17 1:54 ` Yoshihiro Shimoda
2023-10-13 12:19 ` [PATCH net-next v2 2/2] rswitch: Add PM ops Yoshihiro Shimoda
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