Add support for instantiating platform-devs, note this also makes some
small changes to the i2c_client instantiating code to make the 2 flows
identical.
Specifically for the pdevs flow pdev_count must only be set after
allocating the pdevs array, to avoid a NULL ptr deref in
x86_android_tablet_cleanup() and the i2c_clients flow is updated
to work the same way.
Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx>
---
drivers/platform/x86/x86-android-tablets.c | 36 ++++++++++++++++++----
1 file changed, 30 insertions(+), 6 deletions(-)
diff --git a/drivers/platform/x86/x86-android-tablets.c b/drivers/platform/x86/x86-android-tablets.c
index 44138882bc9f..4bcad05d4039 100644
--- a/drivers/platform/x86/x86-android-tablets.c
+++ b/drivers/platform/x86/x86-android-tablets.c
@@ -20,6 +20,7 @@
#include <linux/irqdomain.h>
#include <linux/module.h>
#include <linux/mod_devicetable.h>
+#include <linux/platform_device.h>
#include <linux/string.h>
/* For gpio_get_desc() which is EXPORT_SYMBOL_GPL() */
#include "../../gpio/gpiolib.h"
@@ -128,7 +129,9 @@ struct x86_i2c_client_info {
struct x86_dev_info {
const struct x86_i2c_client_info *i2c_client_info;
+ const struct platform_device_info *pdev_info;
int i2c_client_count;
+ int pdev_count;
};
/*
@@ -269,7 +272,9 @@ static const struct dmi_system_id x86_android_tablet_ids[] __initconst = {
MODULE_DEVICE_TABLE(dmi, x86_android_tablet_ids);
static int i2c_client_count;
+static int pdev_count;
static struct i2c_client **i2c_clients;
+static struct platform_device **pdevs;
static __init int x86_instantiate_i2c_client(const struct x86_dev_info *dev_info,
int idx)
@@ -309,6 +314,11 @@ static void x86_android_tablet_cleanup(void)
{
int i;
+ for (i = 0; i < pdev_count; i++)
+ platform_device_unregister(pdevs[i]);
+
+ kfree(pdevs);
+
for (i = 0; i < i2c_client_count; i++)
i2c_unregister_device(i2c_clients[i]);
@@ -327,21 +337,35 @@ static __init int x86_android_tablet_init(void)
dev_info = id->driver_data;
- i2c_client_count = dev_info->i2c_client_count;
-
- i2c_clients = kcalloc(i2c_client_count, sizeof(*i2c_clients), GFP_KERNEL);
+ i2c_clients = kcalloc(dev_info->i2c_client_count, sizeof(*i2c_clients), GFP_KERNEL);
if (!i2c_clients)
return -ENOMEM;
- for (i = 0; i < dev_info->i2c_client_count; i++) {
+ i2c_client_count = dev_info->i2c_client_count;
+ for (i = 0; i < i2c_client_count; i++) {
ret = x86_instantiate_i2c_client(dev_info, i);
if (ret < 0) {
x86_android_tablet_cleanup();
- break;
+ return ret;
+ }
+ }
+
+ pdevs = kcalloc(dev_info->pdev_count, sizeof(*pdevs), GFP_KERNEL);
+ if (!pdevs) {
+ x86_android_tablet_cleanup();
+ return -ENOMEM;
+ }
+
+ pdev_count = dev_info->pdev_count;
+ for (i = 0; i < pdev_count; i++) {
+ pdevs[i] = platform_device_register_full(&dev_info->pdev_info[i]);
+ if (IS_ERR(pdevs[i])) {
+ x86_android_tablet_cleanup();
+ return PTR_ERR(pdevs[i]);
}
}
- return ret;
+ return 0;
}
module_init(x86_android_tablet_init);
--
2.33.1
