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platform/x86: wmi: move struct wmi_device_id to mod_devicetable.h

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In preparation for adding WMI support to MODULE_DEVICE_TABLE() move the
definition of struct wmi_device_id to mod_devicetable.h and inline
guid_string in the struct.

Changing guid_string to an inline char array changes the loop conditions
when looping over an array of struct wmi_device_id. Therefore update
wmi_dev_match()'s loop to check for an empty guid_string instead of a
NULL pointer.

Signed-off-by: Mattias Jacobsson <2pi@mok.nu>
[dvhart: Move UUID_STRING_LEN define to this patch]
Signed-off-by: Darren Hart (VMware) <dvhart@infradead.org>
This commit is contained in:
Mattias Jacobsson 2019-02-19 20:59:49 +01:00 committed by Darren Hart (VMware)
parent 841f1b8fb4
commit eacc95eae6
4 changed files with 15 additions and 5 deletions
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2
drivers/platform/x86/wmi.c
View File

@ -771,7 +771,7 @@ static int wmi_dev_match(struct device *dev, struct device_driver *driver)
if (id == NULL)
return 0;
while (id->guid_string) {
while (*id->guid_string) {
uuid_le driver_guid;
if (WARN_ON(uuid_le_to_bin(id->guid_string, &driver_guid)))

12
include/linux/mod_devicetable.h
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@ -779,4 +779,16 @@ struct typec_device_id {
kernel_ulong_t driver_data;
};
/* WMI */
#define WMI_MODULE_PREFIX "wmi:"
/**
* struct wmi_device_id - WMI device identifier
* @guid_string: 36 char string of the form fa50ff2b-f2e8-45de-83fa-65417f2f49ba
*/
struct wmi_device_id {
const char guid_string[UUID_STRING_LEN+1];
};
#endif /* LINUX_MOD_DEVICETABLE_H */

5
include/linux/wmi.h
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@ -18,6 +18,7 @@
#include <linux/device.h>
#include <linux/acpi.h>
#include <linux/mod_devicetable.h>
#include <uapi/linux/wmi.h>
struct wmi_device {
@ -39,10 +40,6 @@ extern union acpi_object *wmidev_block_query(struct wmi_device *wdev,
extern int set_required_buffer_size(struct wmi_device *wdev, u64 length);
struct wmi_device_id {
const char *guid_string;
};
struct wmi_driver {
struct device_driver driver;
const struct wmi_device_id *id_table;

1
scripts/mod/file2alias.c
View File

@ -37,6 +37,7 @@ typedef unsigned char __u8;
typedef struct {
__u8 b[16];
} uuid_le;
#define UUID_STRING_LEN 36
/* Big exception to the "don't include kernel headers into userspace, which
* even potentially has different endianness and word sizes, since