backend/session: allow wlr_session_find_gpus to return an error
Sometimes wlr_session_find_gpus will encounter an error. This is different from finding zero GPUs. On error, wlr_session_find_gpus already returns -1. However, this is casted to size_t, so callers uncorrectly assume this is a success. Instead, make wlr_session_find_gpus return a ssize_t and allow callers to handle the error accordingly.
This commit is contained in:
parent
7febdc7334
commit
e8d56ca415
|
@ -150,11 +150,16 @@ static struct wlr_backend *attempt_noop_backend(struct wl_display *display) {
|
||||||
static struct wlr_backend *attempt_drm_backend(struct wl_display *display,
|
static struct wlr_backend *attempt_drm_backend(struct wl_display *display,
|
||||||
struct wlr_backend *backend, struct wlr_session *session) {
|
struct wlr_backend *backend, struct wlr_session *session) {
|
||||||
struct wlr_device *gpus[8];
|
struct wlr_device *gpus[8];
|
||||||
size_t num_gpus = wlr_session_find_gpus(session, 8, gpus);
|
ssize_t num_gpus = wlr_session_find_gpus(session, 8, gpus);
|
||||||
struct wlr_backend *primary_drm = NULL;
|
if (num_gpus < 0) {
|
||||||
|
wlr_log(WLR_ERROR, "Failed to find GPUs");
|
||||||
|
return NULL;
|
||||||
|
}
|
||||||
|
|
||||||
wlr_log(WLR_INFO, "Found %zu GPUs", num_gpus);
|
wlr_log(WLR_INFO, "Found %zu GPUs", num_gpus);
|
||||||
|
|
||||||
for (size_t i = 0; i < num_gpus; ++i) {
|
struct wlr_backend *primary_drm = NULL;
|
||||||
|
for (size_t i = 0; i < (size_t)num_gpus; ++i) {
|
||||||
struct wlr_backend *drm = wlr_drm_backend_create(display, session,
|
struct wlr_backend *drm = wlr_drm_backend_create(display, session,
|
||||||
gpus[i], primary_drm);
|
gpus[i], primary_drm);
|
||||||
if (!drm) {
|
if (!drm) {
|
||||||
|
|
|
@ -278,12 +278,12 @@ out_dev:
|
||||||
return NULL;
|
return NULL;
|
||||||
}
|
}
|
||||||
|
|
||||||
static size_t explicit_find_gpus(struct wlr_session *session,
|
static ssize_t explicit_find_gpus(struct wlr_session *session,
|
||||||
size_t ret_len, struct wlr_device *ret[static ret_len], const char *str) {
|
size_t ret_len, struct wlr_device *ret[static ret_len], const char *str) {
|
||||||
char *gpus = strdup(str);
|
char *gpus = strdup(str);
|
||||||
if (!gpus) {
|
if (!gpus) {
|
||||||
wlr_log_errno(WLR_ERROR, "Allocation failed");
|
wlr_log_errno(WLR_ERROR, "Allocation failed");
|
||||||
return 0;
|
return -1;
|
||||||
}
|
}
|
||||||
|
|
||||||
size_t i = 0;
|
size_t i = 0;
|
||||||
|
@ -345,7 +345,7 @@ static void find_gpus_handle_add(struct wl_listener *listener, void *data) {
|
||||||
/* Tries to find the primary GPU by checking for the "boot_vga" attribute.
|
/* Tries to find the primary GPU by checking for the "boot_vga" attribute.
|
||||||
* If it's not found, it returns the first valid GPU it finds.
|
* If it's not found, it returns the first valid GPU it finds.
|
||||||
*/
|
*/
|
||||||
size_t wlr_session_find_gpus(struct wlr_session *session,
|
ssize_t wlr_session_find_gpus(struct wlr_session *session,
|
||||||
size_t ret_len, struct wlr_device **ret) {
|
size_t ret_len, struct wlr_device **ret) {
|
||||||
const char *explicit = getenv("WLR_DRM_DEVICES");
|
const char *explicit = getenv("WLR_DRM_DEVICES");
|
||||||
if (explicit) {
|
if (explicit) {
|
||||||
|
|
|
@ -96,7 +96,7 @@ void wlr_session_close_file(struct wlr_session *session,
|
||||||
*/
|
*/
|
||||||
bool wlr_session_change_vt(struct wlr_session *session, unsigned vt);
|
bool wlr_session_change_vt(struct wlr_session *session, unsigned vt);
|
||||||
|
|
||||||
size_t wlr_session_find_gpus(struct wlr_session *session,
|
ssize_t wlr_session_find_gpus(struct wlr_session *session,
|
||||||
size_t ret_len, struct wlr_device **ret);
|
size_t ret_len, struct wlr_device **ret);
|
||||||
|
|
||||||
#endif
|
#endif
|
||||||
|
|
Loading…
Reference in New Issue