diff options
| author | YueHaibing <yuehaibing@huawei.com> | 2018-12-29 10:49:07 +0800 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2019-01-07 11:26:31 +0100 |
| commit | c39191feed4540fed98badeb484833dcf659bb96 (patch) | |
| tree | 7ecf7ff83106a2a7acc9375bda5ecfc8e829b56c /drivers/gpu/drm/drm_context.c | |
| parent | 227ad6d957898a88b1746e30234ece64d305f066 (diff) | |
| download | linux-c39191feed4540fed98badeb484833dcf659bb96.tar.bz2 | |
drm: Fix error handling in drm_legacy_addctx
'ctx->handle' is unsigned, it never less than zero.
This patch use int 'tmp_handle' to handle the err condition.
Fixes: 62968144e673 ("drm: convert drm context code to use Linux idr")
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20181229024907.12852-1-yuehaibing@huawei.com
Diffstat (limited to 'drivers/gpu/drm/drm_context.c')
| -rw-r--r-- | drivers/gpu/drm/drm_context.c | 15 |
1 files changed, 9 insertions, 6 deletions
diff --git a/drivers/gpu/drm/drm_context.c b/drivers/gpu/drm/drm_context.c index 506663c69b0a..6e8e1a9fcae3 100644 --- a/drivers/gpu/drm/drm_context.c +++ b/drivers/gpu/drm/drm_context.c @@ -361,23 +361,26 @@ int drm_legacy_addctx(struct drm_device *dev, void *data, { struct drm_ctx_list *ctx_entry; struct drm_ctx *ctx = data; + int tmp_handle; if (!drm_core_check_feature(dev, DRIVER_KMS_LEGACY_CONTEXT) && !drm_core_check_feature(dev, DRIVER_LEGACY)) return -EOPNOTSUPP; - ctx->handle = drm_legacy_ctxbitmap_next(dev); - if (ctx->handle == DRM_KERNEL_CONTEXT) { + tmp_handle = drm_legacy_ctxbitmap_next(dev); + if (tmp_handle == DRM_KERNEL_CONTEXT) { /* Skip kernel's context and get a new one. */ - ctx->handle = drm_legacy_ctxbitmap_next(dev); + tmp_handle = drm_legacy_ctxbitmap_next(dev); } - DRM_DEBUG("%d\n", ctx->handle); - if (ctx->handle < 0) { + DRM_DEBUG("%d\n", tmp_handle); + if (tmp_handle < 0) { DRM_DEBUG("Not enough free contexts.\n"); /* Should this return -EBUSY instead? */ - return -ENOMEM; + return tmp_handle; } + ctx->handle = tmp_handle; + ctx_entry = kmalloc(sizeof(*ctx_entry), GFP_KERNEL); if (!ctx_entry) { DRM_DEBUG("out of memory\n"); |