diff mbox

drm/pl111: Fix module probe bug

Message ID 20180503134053.24945-1-linus.walleij@linaro.org (mailing list archive)
State New, archived
Headers show

Commit Message

Linus Walleij May 3, 2018, 1:40 p.m. UTC
Commit a30933c27602 ("drm/pl111: Support the Versatile Express")
Added a second module using the builtin_platform_driver() call,
which works fine as long as you do not try to build the PL111
driver as a module, because a module can only have one initcall
and cause the following build bug:

(...) multiple definition of `init_module' (...)

Reported-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Liviu Dudau <liviu.dudau@arm.com>
Cc: Pawel Moll <pawel.moll@arm.com>
Cc: Eric Anholt <eric@anholt.net>
Cc: Robin Murphy <robin.murphy@arm.com>
Fixes: a30933c27602 ("drm/pl111: Support the Versatile Express")
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
 drivers/gpu/drm/pl111/pl111_versatile.c | 7 +++++++
 drivers/gpu/drm/pl111/pl111_vexpress.c  | 5 ++++-
 drivers/gpu/drm/pl111/pl111_vexpress.h  | 7 +++++++
 3 files changed, 18 insertions(+), 1 deletion(-)

Comments

Daniel Vetter May 3, 2018, 1:43 p.m. UTC | #1
On Thu, May 03, 2018 at 03:40:53PM +0200, Linus Walleij wrote:
> Commit a30933c27602 ("drm/pl111: Support the Versatile Express")
> Added a second module using the builtin_platform_driver() call,
> which works fine as long as you do not try to build the PL111
> driver as a module, because a module can only have one initcall
> and cause the following build bug:
> 
> (...) multiple definition of `init_module' (...)
> 
> Reported-by: Daniel Vetter <daniel.vetter@ffwll.ch>
> Cc: Liviu Dudau <liviu.dudau@arm.com>
> Cc: Pawel Moll <pawel.moll@arm.com>
> Cc: Eric Anholt <eric@anholt.net>
> Cc: Robin Murphy <robin.murphy@arm.com>
> Fixes: a30933c27602 ("drm/pl111: Support the Versatile Express")
> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

lgtm. Please also reenable the pl111 driver in the drm-rerere branch, you
can simple revert 17c11b73c2ea6a21eaad5c1f5d358054c9e2c2f6.

Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>

> ---
>  drivers/gpu/drm/pl111/pl111_versatile.c | 7 +++++++
>  drivers/gpu/drm/pl111/pl111_vexpress.c  | 5 ++++-
>  drivers/gpu/drm/pl111/pl111_vexpress.h  | 7 +++++++
>  3 files changed, 18 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/pl111/pl111_versatile.c b/drivers/gpu/drm/pl111/pl111_versatile.c
> index 78ddf8534fd2..2f0daab30973 100644
> --- a/drivers/gpu/drm/pl111/pl111_versatile.c
> +++ b/drivers/gpu/drm/pl111/pl111_versatile.c
> @@ -326,6 +326,13 @@ int pl111_versatile_init(struct device *dev, struct pl111_drm_dev_private *priv)
>  	if (versatile_clcd_type == VEXPRESS_CLCD_V2M) {
>  		struct platform_device *pdev;
>  
> +		/* Registers a driver for the muxfpga */
> +		ret = vexpress_muxfpga_init();
> +		if (ret) {
> +			dev_err(dev, "unable to intialized muxfpga driver\n");
> +			return ret;
> +		}
> +
>  		/* Call into deep Vexpress configuration API */
>  		pdev = of_find_device_by_node(np);
>  		if (!pdev) {
> diff --git a/drivers/gpu/drm/pl111/pl111_vexpress.c b/drivers/gpu/drm/pl111/pl111_vexpress.c
> index c9fee625faf1..508878c9bd52 100644
> --- a/drivers/gpu/drm/pl111/pl111_vexpress.c
> +++ b/drivers/gpu/drm/pl111/pl111_vexpress.c
> @@ -122,4 +122,7 @@ static struct platform_driver vexpress_muxfpga_driver = {
>  	.probe = vexpress_muxfpga_probe,
>  };
>  
> -builtin_platform_driver(vexpress_muxfpga_driver);
> +int vexpress_muxfpga_init(void)
> +{
> +	return platform_driver_register(&vexpress_muxfpga_driver);
> +}
> diff --git a/drivers/gpu/drm/pl111/pl111_vexpress.h b/drivers/gpu/drm/pl111/pl111_vexpress.h
> index 49876417f7b6..40fbe42369dc 100644
> --- a/drivers/gpu/drm/pl111/pl111_vexpress.h
> +++ b/drivers/gpu/drm/pl111/pl111_vexpress.h
> @@ -10,6 +10,8 @@ int pl111_vexpress_clcd_init(struct device *dev,
>  			     struct pl111_drm_dev_private *priv,
>  			     struct regmap *map);
>  
> +int vexpress_muxfpga_init(void);
> +
>  #else
>  
>  static int inline pl111_vexpress_clcd_init(struct device *dev,
> @@ -19,4 +21,9 @@ static int inline pl111_vexpress_clcd_init(struct device *dev,
>  	return -ENODEV;
>  }
>  
> +static inline int vexpress_muxfpga_init(void)
> +{
> +	return 0;
> +}
> +
>  #endif
> -- 
> 2.17.0
> 
> _______________________________________________
> dri-devel mailing list
> dri-devel@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/dri-devel
Linus Walleij May 3, 2018, 2:06 p.m. UTC | #2
On Thu, May 3, 2018 at 3:43 PM, Daniel Vetter <daniel@ffwll.ch> wrote:
> On Thu, May 03, 2018 at 03:40:53PM +0200, Linus Walleij wrote:
>> Commit a30933c27602 ("drm/pl111: Support the Versatile Express")
>> Added a second module using the builtin_platform_driver() call,
>> which works fine as long as you do not try to build the PL111
>> driver as a module, because a module can only have one initcall
>> and cause the following build bug:
>>
>> (...) multiple definition of `init_module' (...)
>>
>> Reported-by: Daniel Vetter <daniel.vetter@ffwll.ch>
>> Cc: Liviu Dudau <liviu.dudau@arm.com>
>> Cc: Pawel Moll <pawel.moll@arm.com>
>> Cc: Eric Anholt <eric@anholt.net>
>> Cc: Robin Murphy <robin.murphy@arm.com>
>> Fixes: a30933c27602 ("drm/pl111: Support the Versatile Express")
>> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
>
> lgtm. Please also reenable the pl111 driver in the drm-rerere branch, you
> can simple revert 17c11b73c2ea6a21eaad5c1f5d358054c9e2c2f6.
>
> Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>

Thanks Daniel, hope I can count that Review tag for v2 as well.

Will apply and push later tonight unless I have done more mistakes.

Yours,
Linus Walleij
diff mbox

Patch

diff --git a/drivers/gpu/drm/pl111/pl111_versatile.c b/drivers/gpu/drm/pl111/pl111_versatile.c
index 78ddf8534fd2..2f0daab30973 100644
--- a/drivers/gpu/drm/pl111/pl111_versatile.c
+++ b/drivers/gpu/drm/pl111/pl111_versatile.c
@@ -326,6 +326,13 @@  int pl111_versatile_init(struct device *dev, struct pl111_drm_dev_private *priv)
 	if (versatile_clcd_type == VEXPRESS_CLCD_V2M) {
 		struct platform_device *pdev;
 
+		/* Registers a driver for the muxfpga */
+		ret = vexpress_muxfpga_init();
+		if (ret) {
+			dev_err(dev, "unable to intialized muxfpga driver\n");
+			return ret;
+		}
+
 		/* Call into deep Vexpress configuration API */
 		pdev = of_find_device_by_node(np);
 		if (!pdev) {
diff --git a/drivers/gpu/drm/pl111/pl111_vexpress.c b/drivers/gpu/drm/pl111/pl111_vexpress.c
index c9fee625faf1..508878c9bd52 100644
--- a/drivers/gpu/drm/pl111/pl111_vexpress.c
+++ b/drivers/gpu/drm/pl111/pl111_vexpress.c
@@ -122,4 +122,7 @@  static struct platform_driver vexpress_muxfpga_driver = {
 	.probe = vexpress_muxfpga_probe,
 };
 
-builtin_platform_driver(vexpress_muxfpga_driver);
+int vexpress_muxfpga_init(void)
+{
+	return platform_driver_register(&vexpress_muxfpga_driver);
+}
diff --git a/drivers/gpu/drm/pl111/pl111_vexpress.h b/drivers/gpu/drm/pl111/pl111_vexpress.h
index 49876417f7b6..40fbe42369dc 100644
--- a/drivers/gpu/drm/pl111/pl111_vexpress.h
+++ b/drivers/gpu/drm/pl111/pl111_vexpress.h
@@ -10,6 +10,8 @@  int pl111_vexpress_clcd_init(struct device *dev,
 			     struct pl111_drm_dev_private *priv,
 			     struct regmap *map);
 
+int vexpress_muxfpga_init(void);
+
 #else
 
 static int inline pl111_vexpress_clcd_init(struct device *dev,
@@ -19,4 +21,9 @@  static int inline pl111_vexpress_clcd_init(struct device *dev,
 	return -ENODEV;
 }
 
+static inline int vexpress_muxfpga_init(void)
+{
+	return 0;
+}
+
 #endif