* [PATCH] phy: miphy28lp: kzalloc + kcalloc to single kzalloc
@ 2026-03-04 23:28 Rosen Penev
2026-03-06 4:27 ` Gustavo A. R. Silva
0 siblings, 1 reply; 3+ messages in thread
From: Rosen Penev @ 2026-03-04 23:28 UTC (permalink / raw)
To: linux-phy
Cc: Patrice Chotard, Vinod Koul, Neil Armstrong, Kees Cook,
Gustavo A. R. Silva, moderated list:ARM/STI ARCHITECTURE,
open list,
open list:KERNEL HARDENING (not covered by other areas):Keyword:b__counted_by(_le|_be)?b
Use flex array to simplify allocation.
Allows using __counted_by for extra runtime analysis.
Signed-off-by: Rosen Penev <rosenp@gmail.com>
---
drivers/phy/st/phy-miphy28lp.c | 12 +++++-------
1 file changed, 5 insertions(+), 7 deletions(-)
diff --git a/drivers/phy/st/phy-miphy28lp.c b/drivers/phy/st/phy-miphy28lp.c
index 43cef89af55e..fd931ede7162 100644
--- a/drivers/phy/st/phy-miphy28lp.c
+++ b/drivers/phy/st/phy-miphy28lp.c
@@ -224,8 +224,8 @@ struct miphy28lp_dev {
struct device *dev;
struct regmap *regmap;
struct mutex miphy_mutex;
- struct miphy28lp_phy **phys;
int nphys;
+ struct miphy28lp_phy *phys[] __counted_by(nphys);
};
enum miphy_sata_gen { SATA_GEN1, SATA_GEN2, SATA_GEN3 };
@@ -1168,16 +1168,14 @@ static int miphy28lp_probe(struct platform_device *pdev)
struct phy_provider *provider;
struct phy *phy;
int ret, port = 0;
+ size_t nphys;
- miphy_dev = devm_kzalloc(&pdev->dev, sizeof(*miphy_dev), GFP_KERNEL);
+ nphys = of_get_child_count(np);
+ miphy_dev = devm_kzalloc(&pdev->dev, struct_size(wiphy_dev, phys, nphys) ,GFP_KERNEL);
if (!miphy_dev)
return -ENOMEM;
- miphy_dev->nphys = of_get_child_count(np);
- miphy_dev->phys = devm_kcalloc(&pdev->dev, miphy_dev->nphys,
- sizeof(*miphy_dev->phys), GFP_KERNEL);
- if (!miphy_dev->phys)
- return -ENOMEM;
+ miphy_dev->nphys = nphys;
miphy_dev->regmap = syscon_regmap_lookup_by_phandle(np, "st,syscfg");
if (IS_ERR(miphy_dev->regmap)) {
--
2.53.0
--
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linux-phy@lists.infradead.org
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^ permalink raw reply related [flat|nested] 3+ messages in thread
* Re: [PATCH] phy: miphy28lp: kzalloc + kcalloc to single kzalloc
2026-03-04 23:28 [PATCH] phy: miphy28lp: kzalloc + kcalloc to single kzalloc Rosen Penev
@ 2026-03-06 4:27 ` Gustavo A. R. Silva
2026-03-06 19:36 ` Rosen Penev
0 siblings, 1 reply; 3+ messages in thread
From: Gustavo A. R. Silva @ 2026-03-06 4:27 UTC (permalink / raw)
To: Rosen Penev, linux-phy
Cc: Patrice Chotard, Vinod Koul, Neil Armstrong, Kees Cook,
Gustavo A. R. Silva, moderated list:ARM/STI ARCHITECTURE,
open list,
open list:KERNEL HARDENING (not covered by other areas):Keyword:b__counted_by(_le|_be)?b
On 3/5/26 08:28, Rosen Penev wrote:
> Use flex array to simplify allocation.
>
> Allows using __counted_by for extra runtime analysis.
>
> Signed-off-by: Rosen Penev <rosenp@gmail.com>
> ---
> drivers/phy/st/phy-miphy28lp.c | 12 +++++-------
> 1 file changed, 5 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/phy/st/phy-miphy28lp.c b/drivers/phy/st/phy-miphy28lp.c
> index 43cef89af55e..fd931ede7162 100644
> --- a/drivers/phy/st/phy-miphy28lp.c
> +++ b/drivers/phy/st/phy-miphy28lp.c
> @@ -224,8 +224,8 @@ struct miphy28lp_dev {
> struct device *dev;
> struct regmap *regmap;
> struct mutex miphy_mutex;
> - struct miphy28lp_phy **phys;
> int nphys;
> + struct miphy28lp_phy *phys[] __counted_by(nphys);
> };
>
> enum miphy_sata_gen { SATA_GEN1, SATA_GEN2, SATA_GEN3 };
> @@ -1168,16 +1168,14 @@ static int miphy28lp_probe(struct platform_device *pdev)
> struct phy_provider *provider;
> struct phy *phy;
> int ret, port = 0;
> + size_t nphys;
>
> - miphy_dev = devm_kzalloc(&pdev->dev, sizeof(*miphy_dev), GFP_KERNEL);
> + nphys = of_get_child_count(np);
> + miphy_dev = devm_kzalloc(&pdev->dev, struct_size(wiphy_dev, phys, nphys) ,TGFP_KERNEL);
This is bad... it looks like you didn't build any of these patches.
-Gustavo
> if (!miphy_dev)
> return -ENOMEM;
>
> - miphy_dev->nphys = of_get_child_count(np);
> - miphy_dev->phys = devm_kcalloc(&pdev->dev, miphy_dev->nphys,
> - sizeof(*miphy_dev->phys), GFP_KERNEL);
> - if (!miphy_dev->phys)
> - return -ENOMEM;
> + miphy_dev->nphys = nphys;
>
> miphy_dev->regmap = syscon_regmap_lookup_by_phandle(np, "st,syscfg");
> if (IS_ERR(miphy_dev->regmap)) {
--
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linux-phy@lists.infradead.org
https://lists.infradead.org/mailman/listinfo/linux-phy
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [PATCH] phy: miphy28lp: kzalloc + kcalloc to single kzalloc
2026-03-06 4:27 ` Gustavo A. R. Silva
@ 2026-03-06 19:36 ` Rosen Penev
0 siblings, 0 replies; 3+ messages in thread
From: Rosen Penev @ 2026-03-06 19:36 UTC (permalink / raw)
To: Gustavo A. R. Silva
Cc: linux-phy, Patrice Chotard, Vinod Koul, Neil Armstrong, Kees Cook,
Gustavo A. R. Silva, moderated list:ARM/STI ARCHITECTURE,
open list,
open list:KERNEL HARDENING (not covered by other areas):Keyword:b__counted_by(_le|_be)?b
On Fri, Mar 6, 2026 at 11:28 AM Gustavo A. R. Silva
<gustavo@embeddedor.com> wrote:
>
>
>
> On 3/5/26 08:28, Rosen Penev wrote:
> > Use flex array to simplify allocation.
> >
> > Allows using __counted_by for extra runtime analysis.
> >
> > Signed-off-by: Rosen Penev <rosenp@gmail.com>
> > ---
> > drivers/phy/st/phy-miphy28lp.c | 12 +++++-------
> > 1 file changed, 5 insertions(+), 7 deletions(-)
> >
> > diff --git a/drivers/phy/st/phy-miphy28lp.c b/drivers/phy/st/phy-miphy28lp.c
> > index 43cef89af55e..fd931ede7162 100644
> > --- a/drivers/phy/st/phy-miphy28lp.c
> > +++ b/drivers/phy/st/phy-miphy28lp.c
> > @@ -224,8 +224,8 @@ struct miphy28lp_dev {
> > struct device *dev;
> > struct regmap *regmap;
> > struct mutex miphy_mutex;
> > - struct miphy28lp_phy **phys;
> > int nphys;
> > + struct miphy28lp_phy *phys[] __counted_by(nphys);
> > };
> >
> > enum miphy_sata_gen { SATA_GEN1, SATA_GEN2, SATA_GEN3 };
> > @@ -1168,16 +1168,14 @@ static int miphy28lp_probe(struct platform_device *pdev)
> > struct phy_provider *provider;
> > struct phy *phy;
> > int ret, port = 0;
> > + size_t nphys;
> >
> > - miphy_dev = devm_kzalloc(&pdev->dev, sizeof(*miphy_dev), GFP_KERNEL);
> > + nphys = of_get_child_count(np);
> > + miphy_dev = devm_kzalloc(&pdev->dev, struct_size(wiphy_dev, phys, nphys) ,TGFP_KERNEL);
>
> This is bad... it looks like you didn't build any of these patches.
Missing COMPILE_TEST on this driver. Will fix.
>
> -Gustavo
>
> > if (!miphy_dev)
> > return -ENOMEM;
> >
> > - miphy_dev->nphys = of_get_child_count(np);
> > - miphy_dev->phys = devm_kcalloc(&pdev->dev, miphy_dev->nphys,
> > - sizeof(*miphy_dev->phys), GFP_KERNEL);
> > - if (!miphy_dev->phys)
> > - return -ENOMEM;
> > + miphy_dev->nphys = nphys;
> >
> > miphy_dev->regmap = syscon_regmap_lookup_by_phandle(np, "st,syscfg");
> > if (IS_ERR(miphy_dev->regmap)) {
>
--
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linux-phy@lists.infradead.org
https://lists.infradead.org/mailman/listinfo/linux-phy
^ permalink raw reply [flat|nested] 3+ messages in thread
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2026-03-04 23:28 [PATCH] phy: miphy28lp: kzalloc + kcalloc to single kzalloc Rosen Penev
2026-03-06 4:27 ` Gustavo A. R. Silva
2026-03-06 19:36 ` Rosen Penev
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