iio: proximity: Fix use-after-free in hx9023s_send_cfg()

Reorder the assignment of fw_size to happen before release_firmware()
to avoid accessing the firmware structure after it's been freed.

Fixes: e9ed97b ("iio: proximity: hx9023s: Added firmware file parsing functionality")
Closes: https://scan7.scan.coverity.com/#/project-view/52337/11354?selectedIssue=1602791
Signed-off-by: Dheeraj Reddy Jonnalagadda <[email protected]>
Reviewed-by: David Lechner <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Jonathan Cameron <[email protected]>

Author: Dheeraj Reddy Jonnalagadda

drivers/iio/proximity/hx9023s.c

@@ -1036,12 +1036,13 @@ static int hx9023s_send_cfg(const struct firmware *fw, struct hx9023s_data *data
 		return -ENOMEM;
 
 	memcpy(bin->data, fw->data, fw->size);
-	release_firmware(fw);
 
 	bin->fw_size = fw->size;
 	bin->fw_ver = bin->data[FW_VER_OFFSET];
 	bin->reg_count = get_unaligned_le16(bin->data + FW_REG_CNT_OFFSET);
 
+	release_firmware(fw);
+
 	return hx9023s_bin_load(data, bin);
 }