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platform/x86: x86-android-tablets: Fix serdev instantiation no longer working

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After commit b286f4e87e32 ("serial: core: Move tty and serdev to be
children of serial core port device") x86_instantiate_serdev() no longer
works due to the serdev-controller-device moving in the device hierarchy
from (e.g.) /sys/devices/pci0000:00/8086228A:00/serial0 to
/sys/devices/pci0000:00/8086228A:00/8086228A:00:0/8086228A:00:0.0/serial0

Use the new get_serdev_controller() helper function to fix this.

Fixes: b286f4e87e32 ("serial: core: Move tty and serdev to be children of serial core port device")
Cc: Tony Lindgren <tony@atomide.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20240216201721.239791-4-hdegoede@redhat.com
This commit is contained in:
Hans de Goede 2024-02-16 21:17:20 +01:00
parent dc5afd720f
commit 812a79b52b
1 changed files with 9 additions and 26 deletions
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35
drivers/platform/x86/x86-android-tablets/core.c
View File

@ -21,6 +21,7 @@
#include <linux/string.h>
#include "x86-android-tablets.h"
#include "../serdev_helpers.h"
static struct platform_device *x86_android_tablet_device;
@ -232,38 +233,20 @@ static __init int x86_instantiate_spi_dev(const struct x86_dev_info *dev_info, i
static __init int x86_instantiate_serdev(const struct x86_serdev_info *info, int idx)
{
struct acpi_device *ctrl_adev, *serdev_adev;
struct acpi_device *serdev_adev;
struct serdev_device *serdev;
struct device *ctrl_dev;
int ret = -ENODEV;
ctrl_adev = acpi_dev_get_first_match_dev(info->ctrl_hid, info->ctrl_uid, -1);
if (!ctrl_adev) {
pr_err("error could not get %s/%s ctrl adev\n",
info->ctrl_hid, info->ctrl_uid);
return -ENODEV;
}
ctrl_dev = get_serdev_controller(info->ctrl_hid, info->ctrl_uid, 0,
info->ctrl_devname);
if (IS_ERR(ctrl_dev))
return PTR_ERR(ctrl_dev);
serdev_adev = acpi_dev_get_first_match_dev(info->serdev_hid, NULL, -1);
if (!serdev_adev) {
pr_err("error could not get %s serdev adev\n", info->serdev_hid);
goto put_ctrl_adev;
}
/* get_first_physical_node() returns a weak ref, no need to put() it */
ctrl_dev = acpi_get_first_physical_node(ctrl_adev);
if (!ctrl_dev) {
pr_err("error could not get %s/%s ctrl physical dev\n",
info->ctrl_hid, info->ctrl_uid);
goto put_serdev_adev;
}
/* ctrl_dev now points to the controller's parent, get the controller */
ctrl_dev = device_find_child_by_name(ctrl_dev, info->ctrl_devname);
if (!ctrl_dev) {
pr_err("error could not get %s/%s %s ctrl dev\n",
info->ctrl_hid, info->ctrl_uid, info->ctrl_devname);
goto put_serdev_adev;
goto put_ctrl_dev;
}
serdev = serdev_device_alloc(to_serdev_controller(ctrl_dev));
@ -286,8 +269,8 @@ static __init int x86_instantiate_serdev(const struct x86_serdev_info *info, int
put_serdev_adev:
acpi_dev_put(serdev_adev);
put_ctrl_adev:
acpi_dev_put(ctrl_adev);
put_ctrl_dev:
put_device(ctrl_dev);
return ret;
}