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HID: intel-ish-hid: fix wrong driver_data usage

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Currently, in suspend() and resume(), ishtp client drivers are using
driver_data to get "struct ishtp_cl_device" object which is set by
bus driver. It's wrong since the driver_data should not be owned bus.
driver_data should be owned by the corresponding ishtp client driver.
Due to this, some ishtp client driver like cros_ec_ishtp which uses
its driver_data to transfer its data to its child doesn't work correctly.

So this patch removes setting driver_data in bus drier and instead of
using driver_data to get "struct ishtp_cl_device", since "struct device"
is embedded in "struct ishtp_cl_device", we introduce a helper function
that returns "struct ishtp_cl_device" from "struct device".

Signed-off-by: Hyungwoo Yang <hyungwoo.yang@intel.com>
Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This commit is contained in:
Hyungwoo Yang 2019-06-05 21:52:27 -07:00 committed by Jiri Kosina
parent 0a95fc733d
commit b12bbdc5dd
3 changed files with 17 additions and 3 deletions
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4
drivers/hid/intel-ish-hid/ishtp-hid-client.c
View File

@ -899,7 +899,7 @@ static int hid_ishtp_cl_reset(struct ishtp_cl_device *cl_device)
*/
static int hid_ishtp_cl_suspend(struct device *device)
{
struct ishtp_cl_device *cl_device = dev_get_drvdata(device);
struct ishtp_cl_device *cl_device = ishtp_dev_to_cl_device(device);
struct ishtp_cl *hid_ishtp_cl = ishtp_get_drvdata(cl_device);
struct ishtp_cl_data *client_data = ishtp_get_client_data(hid_ishtp_cl);
@ -920,7 +920,7 @@ static int hid_ishtp_cl_suspend(struct device *device)
*/
static int hid_ishtp_cl_resume(struct device *device)
{
struct ishtp_cl_device *cl_device = dev_get_drvdata(device);
struct ishtp_cl_device *cl_device = ishtp_dev_to_cl_device(device);
struct ishtp_cl *hid_ishtp_cl = ishtp_get_drvdata(cl_device);
struct ishtp_cl_data *client_data = ishtp_get_client_data(hid_ishtp_cl);

15
drivers/hid/intel-ish-hid/ishtp/bus.c
View File

@ -479,7 +479,6 @@ static struct ishtp_cl_device *ishtp_bus_add_device(struct ishtp_device *dev,
}
ishtp_device_ready = true;
dev_set_drvdata(&device->dev, device);
return device;
}
@ -647,6 +646,20 @@ void *ishtp_get_drvdata(struct ishtp_cl_device *cl_device)
}
EXPORT_SYMBOL(ishtp_get_drvdata);
/**
* ishtp_dev_to_cl_device() - get ishtp_cl_device instance from device instance
* @device: device instance
*
* Get ish_cl_device instance which embeds device instance in it.
*
* Return: pointer to ishtp_cl_device instance
*/
struct ishtp_cl_device *ishtp_dev_to_cl_device(struct device *device)
{
return to_ishtp_cl_device(device);
}
EXPORT_SYMBOL(ishtp_dev_to_cl_device);
/**
* ishtp_bus_new_client() - Create a new client
* @dev: ISHTP device instance

1
include/linux/intel-ish-client-if.h
View File

@ -103,6 +103,7 @@ void ishtp_put_device(struct ishtp_cl_device *cl_dev);
void ishtp_get_device(struct ishtp_cl_device *cl_dev);
void ishtp_set_drvdata(struct ishtp_cl_device *cl_device, void *data);
void *ishtp_get_drvdata(struct ishtp_cl_device *cl_device);
struct ishtp_cl_device *ishtp_dev_to_cl_device(struct device *dev);
int ishtp_register_event_cb(struct ishtp_cl_device *device,
void (*read_cb)(struct ishtp_cl_device *));
struct ishtp_fw_client *ishtp_fw_cl_get_client(struct ishtp_device *dev,