3.16.61-rc1 review patch. If anyone has any objections, please let me know.
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From: Nicholas Mc Guire hofrat@osadl.org
commit d530b5f1ca0bb66958a2b714bebe40a1248b9c15 upstream.
drm_legacy_ctxbitmap_next() returns idr_alloc() which can return -ENOMEM, -EINVAL or -ENOSPC none of which are -1 . but the call sites of drm_legacy_ctxbitmap_next() seem to be assuming that the error case would be -1 (original return of drm_ctxbitmap_next() prior to 2.6.23 was actually -1). Thus reenable error handling by checking for < 0.
Signed-off-by: Nicholas Mc Guire hofrat@osadl.org Fixes: 62968144e673 ("drm: convert drm context code to use Linux idr") Signed-off-by: Sean Paul seanpaul@chromium.org Link: https://patchwork.freedesktop.org/patch/msgid/1531571532-22733-1-git-send-em... Signed-off-by: Ben Hutchings ben@decadent.org.uk --- drivers/gpu/drm/drm_context.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/gpu/drm/drm_context.c +++ b/drivers/gpu/drm/drm_context.c @@ -316,7 +316,7 @@ int drm_addctx(struct drm_device *dev, v ctx->handle = drm_ctxbitmap_next(dev); } DRM_DEBUG("%d\n", ctx->handle); - if (ctx->handle == -1) { + if (ctx->handle < 0) { DRM_DEBUG("Not enough free contexts.\n"); /* Should this return -EBUSY instead? */ return -ENOMEM;