Remove log_libusb_error()

This helper did not help a lot, and prevented the client to choose the
log level and the prefix error message.

app/src/usb/aoa_hid.c

@@ -45,11 +45,6 @@ sc_hid_event_destroy(struct sc_hid_event *hid_event) {
     free(hid_event->buffer);
 }
 
-static inline void
-log_libusb_error(enum libusb_error errcode) {
-    LOGW("libusb error: %s", libusb_strerror(errcode));
-}
-
 bool
 sc_aoa_init(struct sc_aoa *aoa, struct sc_usb *usb,
             struct sc_acksync *acksync) {
@@ -99,7 +94,7 @@ sc_aoa_register_hid(struct sc_aoa *aoa, uint16_t accessory_id,
                                          request, value, index, buffer, length,
                                          DEFAULT_TIMEOUT);
     if (result < 0) {
-        log_libusb_error((enum libusb_error) result);
+        LOGE("REGISTER_HID: libusb error: %s", libusb_strerror(result));
         return false;
     }
 
@@ -135,7 +130,7 @@ sc_aoa_set_hid_report_desc(struct sc_aoa *aoa, uint16_t accessory_id,
                                          request, value, index, buffer, length,
                                          DEFAULT_TIMEOUT);
     if (result < 0) {
-        log_libusb_error((enum libusb_error) result);
+        LOGE("SET_HID_REPORT_DESC: libusb error: %s", libusb_strerror(result));
         return false;
     }
 
@@ -177,7 +172,7 @@ sc_aoa_send_hid_event(struct sc_aoa *aoa, const struct sc_hid_event *event) {
                                          request, value, index, buffer, length,
                                          DEFAULT_TIMEOUT);
     if (result < 0) {
-        log_libusb_error((enum libusb_error) result);
+        LOGE("SEND_HID_EVENT: libusb error: %s", libusb_strerror(result));
         return false;
     }
 
@@ -199,7 +194,7 @@ sc_aoa_unregister_hid(struct sc_aoa *aoa, const uint16_t accessory_id) {
                                          request, value, index, buffer, length,
                                          DEFAULT_TIMEOUT);
     if (result < 0) {
-        log_libusb_error((enum libusb_error) result);
+        LOGE("UNREGISTER_HID: libusb error: %s", libusb_strerror(result));
         return false;
     }
 

app/src/usb/usb.c

@@ -4,11 +4,6 @@
 
 #include "util/log.h"
 
-static inline void
-log_libusb_error(enum libusb_error errcode) {
-    LOGW("libusb error: %s", libusb_strerror(errcode));
-}
-
 static char *
 read_string(libusb_device_handle *handle, uint8_t desc_index) {
     char buffer[128];
@@ -96,7 +91,7 @@ sc_usb_find_devices(struct sc_usb *usb, const char *serial,
     libusb_device **list;
     ssize_t count = libusb_get_device_list(usb->context, &list);
     if (count < 0) {
-        log_libusb_error((enum libusb_error) count);
+        LOGE("List USB devices: libusb error: %s", libusb_strerror(count));
         return -1;
     }
 
@@ -118,7 +113,7 @@ sc_usb_open_handle(libusb_device *device) {
     libusb_device_handle *handle;
     int result = libusb_open(device, &handle);
     if (result < 0) {
-        log_libusb_error((enum libusb_error) result);
+        LOGE("Open device: libusb error: %s", libusb_strerror(result));
         return NULL;
     }
     return handle;
@@ -183,8 +178,7 @@ sc_usb_register_callback(struct sc_usb *usb) {
     struct libusb_device_descriptor desc;
     int result = libusb_get_device_descriptor(device, &desc);
     if (result < 0) {
-        log_libusb_error((enum libusb_error) result);
-        LOGW("Could not read USB device descriptor");
+        LOGE("Device descriptor: libusb error: %s", libusb_strerror(result));
         return false;
     }
 
@@ -198,8 +192,8 @@ sc_usb_register_callback(struct sc_usb *usb) {
                                               sc_usb_libusb_callback, usb,
                                               &usb->callback_handle);
     if (result < 0) {
-        log_libusb_error((enum libusb_error) result);
-        LOGW("Could not register USB callback");
+        LOGE("Register hotplog callback: libusb error: %s",
+             libusb_strerror(result));
         return false;
     }