[PATCH v2] irqchip/ls-scfg-msi: Use device_get_match_data()

[PATCH v2] irqchip/ls-scfg-msi: Use device_get_match_data()

[Rob Herring]

Use preferred device_get_match_data() instead of of_match_device() to
get the driver match data in a single step without the unnecessary
intermediate match pointer. With this, adjust the includes to
explicitly include the correct headers. That also serves as
preparation to remove implicit includes within the DT headers.
of_platform.h currently includes platform_device.h among others.

Signed-off-by: Rob Herring <robh@kernel.org>
---
v2:
 - Expand commit message
---
 drivers/irqchip/irq-ls-scfg-msi.c | 12 +++++-------
 1 file changed, 5 insertions(+), 7 deletions(-)

diff --git a/drivers/irqchip/irq-ls-scfg-msi.c b/drivers/irqchip/irq-ls-scfg-msi.c
index f31a262fe438..15cf80b46322 100644
--- a/drivers/irqchip/irq-ls-scfg-msi.c
+++ b/drivers/irqchip/irq-ls-scfg-msi.c
@@ -17,7 +17,8 @@
 #include <linux/irqdomain.h>
 #include <linux/of_irq.h>
 #include <linux/of_pci.h>
-#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+#include <linux/property.h>
 #include <linux/spinlock.h>
 
 #define MSI_IRQS_PER_MSIR	32
@@ -334,20 +335,17 @@ MODULE_DEVICE_TABLE(of, ls_scfg_msi_id);
 
 static int ls_scfg_msi_probe(struct platform_device *pdev)
 {
-	const struct of_device_id *match;
 	struct ls_scfg_msi *msi_data;
 	struct resource *res;
 	int i, ret;
 
-	match = of_match_device(ls_scfg_msi_id, &pdev->dev);
-	if (!match)
-		return -ENODEV;
-
 	msi_data = devm_kzalloc(&pdev->dev, sizeof(*msi_data), GFP_KERNEL);
 	if (!msi_data)
 		return -ENOMEM;
 
-	msi_data->cfg = (struct ls_scfg_msi_cfg *) match->data;
+	msi_data->cfg = (struct ls_scfg_msi_cfg *)device_get_match_data(&pdev->dev);
+	if (!msi_data->cfg)
+		return -ENODEV;
 
 	msi_data->regs = devm_platform_get_and_ioremap_resource(pdev, 0, &res);
 	if (IS_ERR(msi_data->regs)) {
-- 
2.42.0

Re: [PATCH v2] irqchip/ls-scfg-msi: Use device_get_match_data()

[Vladimir Oltean]

On Fri, Oct 20, 2023 at 08:02:56AM -0500, Rob Herring wrote:
> Use preferred device_get_match_data() instead of of_match_device() to
> get the driver match data in a single step without the unnecessary
> intermediate match pointer. With this, adjust the includes to
> explicitly include the correct headers. That also serves as
> preparation to remove implicit includes within the DT headers.
> of_platform.h currently includes platform_device.h among others.
> 
> Signed-off-by: Rob Herring <robh@kernel.org>
> ---

Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Tested-by: Vladimir Oltean <vladimir.oltean@nxp.com>

> v2:
>  - Expand commit message
> ---
>  drivers/irqchip/irq-ls-scfg-msi.c | 12 +++++-------
>  1 file changed, 5 insertions(+), 7 deletions(-)
> 
> diff --git a/drivers/irqchip/irq-ls-scfg-msi.c b/drivers/irqchip/irq-ls-scfg-msi.c
> index f31a262fe438..15cf80b46322 100644
> --- a/drivers/irqchip/irq-ls-scfg-msi.c
> +++ b/drivers/irqchip/irq-ls-scfg-msi.c
> @@ -17,7 +17,8 @@
>  #include <linux/irqdomain.h>
>  #include <linux/of_irq.h>
>  #include <linux/of_pci.h>
> -#include <linux/of_platform.h>
> +#include <linux/platform_device.h>
> +#include <linux/property.h>
>  #include <linux/spinlock.h>
>  
>  #define MSI_IRQS_PER_MSIR	32
> @@ -334,20 +335,17 @@ MODULE_DEVICE_TABLE(of, ls_scfg_msi_id);
>  
>  static int ls_scfg_msi_probe(struct platform_device *pdev)
>  {
> -	const struct of_device_id *match;
>  	struct ls_scfg_msi *msi_data;
>  	struct resource *res;
>  	int i, ret;
>  
> -	match = of_match_device(ls_scfg_msi_id, &pdev->dev);
> -	if (!match)
> -		return -ENODEV;
> -
>  	msi_data = devm_kzalloc(&pdev->dev, sizeof(*msi_data), GFP_KERNEL);
>  	if (!msi_data)
>  		return -ENOMEM;
>  
> -	msi_data->cfg = (struct ls_scfg_msi_cfg *) match->data;
> +	msi_data->cfg = (struct ls_scfg_msi_cfg *)device_get_match_data(&pdev->dev);

I wanted to suggest to drop the unnecessary cast of the void pointer.
But the driver keeps msi_data->cfg as a non-const pointer, and that
causes a warning that is otherwise suppressed by this cast. So eliminating
the type cast and keeping "cfg" as const is definitely a separate change.

> +	if (!msi_data->cfg)
> +		return -ENODEV;
>  
>  	msi_data->regs = devm_platform_get_and_ioremap_resource(pdev, 0, &res);
>  	if (IS_ERR(msi_data->regs)) {
> -- 
> 2.42.0
>

[tip: irq/core] irqchip/ls-scfg-msi: Use device_get_match_data()

[tip-bot2 for Rob Herring]

The following commit has been merged into the irq/core branch of tip:

Commit-ID:     08d4c174828d868d314d2475fbcaa1393f0bbba9
Gitweb:        https://git.kernel.org/tip/08d4c174828d868d314d2475fbcaa1393f0bbba9
Author:        Rob Herring <robh@kernel.org>
AuthorDate:    Fri, 20 Oct 2023 08:02:56 -05:00
Committer:     Thomas Gleixner <tglx@linutronix.de>
CommitterDate: Fri, 27 Oct 2023 09:15:44 +02:00

irqchip/ls-scfg-msi: Use device_get_match_data()

Use preferred device_get_match_data() instead of of_match_device() to
get the driver match data in a single step without the unnecessary
intermediate match pointer.

With this, adjust the includes to explicitly include the correct
headers. That also serves as preparation to remove implicit includes within
the DT headers.  of_platform.h currently includes platform_device.h among
others.

Signed-off-by: Rob Herring <robh@kernel.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Link: https://lore.kernel.org/r/20231020130255.2954415-3-robh@kernel.org

---
 drivers/irqchip/irq-ls-scfg-msi.c | 12 +++++-------
 1 file changed, 5 insertions(+), 7 deletions(-)

diff --git a/drivers/irqchip/irq-ls-scfg-msi.c b/drivers/irqchip/irq-ls-scfg-msi.c
index f31a262..15cf80b 100644
--- a/drivers/irqchip/irq-ls-scfg-msi.c
+++ b/drivers/irqchip/irq-ls-scfg-msi.c
@@ -17,7 +17,8 @@
 #include <linux/irqdomain.h>
 #include <linux/of_irq.h>
 #include <linux/of_pci.h>
-#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+#include <linux/property.h>
 #include <linux/spinlock.h>
 
 #define MSI_IRQS_PER_MSIR	32
@@ -334,20 +335,17 @@ MODULE_DEVICE_TABLE(of, ls_scfg_msi_id);
 
 static int ls_scfg_msi_probe(struct platform_device *pdev)
 {
-	const struct of_device_id *match;
 	struct ls_scfg_msi *msi_data;
 	struct resource *res;
 	int i, ret;
 
-	match = of_match_device(ls_scfg_msi_id, &pdev->dev);
-	if (!match)
-		return -ENODEV;
-
 	msi_data = devm_kzalloc(&pdev->dev, sizeof(*msi_data), GFP_KERNEL);
 	if (!msi_data)
 		return -ENOMEM;
 
-	msi_data->cfg = (struct ls_scfg_msi_cfg *) match->data;
+	msi_data->cfg = (struct ls_scfg_msi_cfg *)device_get_match_data(&pdev->dev);
+	if (!msi_data->cfg)
+		return -ENODEV;
 
 	msi_data->regs = devm_platform_get_and_ioremap_resource(pdev, 0, &res);
 	if (IS_ERR(msi_data->regs)) {