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linux: Parse HID_FIRMWARE_VERSION from uevent for release_number #847

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Nov 12, 2026
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linux: Parse HID_FIRMWARE_VERSION from uevent for release_number #847

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14 changes: 11 additions & 3 deletions linux/hid.c
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Original file line number Diff line number Diff line change
Expand Up @@ -585,7 +585,8 @@ static int get_hid_report_descriptor_from_hidraw(hid_device *dev, struct hidraw_
*/
static int parse_uevent_info(const char *uevent, unsigned *bus_type,
unsigned short *vendor_id, unsigned short *product_id,
char **serial_number_utf8, char **product_name_utf8)
char **serial_number_utf8, char **product_name_utf8,
unsigned short *version)
{
char tmp[1024];

Expand Down Expand Up @@ -638,6 +639,11 @@ static int parse_uevent_info(const char *uevent, unsigned *bus_type,
free(*serial_number_utf8);
*serial_number_utf8 = strdup(value);
found_serial = 1;
} else if (strcmp(key, "HID_FIRMWARE_VERSION") == 0) {
/* Available since Linux 7.1 when supplied by the kernel driver:
* https://git.kernel.org/torvalds/c/6ca9029c823b7853e980585e757343e0e84227cd
*/
*version = (unsigned short)strtol(value, NULL, 16);
}

next_line:
Expand All @@ -664,6 +670,7 @@ static struct hid_device_info * create_device_info_for_device(struct udev_device
char *serial_number_utf8 = NULL;
char *product_name_utf8 = NULL;
unsigned bus_type;
unsigned short hid_version = 0;
int result;
struct hidraw_report_descriptor report_desc;

Expand All @@ -686,7 +693,8 @@ static struct hid_device_info * create_device_info_for_device(struct udev_device
&dev_vid,
&dev_pid,
&serial_number_utf8,
&product_name_utf8);
&product_name_utf8,
&hid_version);

if (!result) {
/* parse_uevent_info() failed for at least one field. */
Expand Down Expand Up @@ -725,7 +733,7 @@ static struct hid_device_info * create_device_info_for_device(struct udev_device
cur_dev->serial_number = utf8_to_wchar_t(serial_number_utf8);

/* Release Number */
cur_dev->release_number = 0x0;
cur_dev->release_number = hid_version;

/* Interface Number */
cur_dev->interface_number = -1;
Expand Down
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