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From 30772942cc1095c3129eecfa182e2c568e566b9d Mon Sep 17 00:00:00 2001
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From: Dan Carpenter <dan.carpenter@oracle.com>
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Date: Thu, 13 Oct 2016 11:54:31 +0300
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Subject: [PATCH] drm/vc4: Fix a couple error codes in vc4_cl_lookup_bos()
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If the allocation fails the current code returns success. If
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copy_from_user() fails it returns the number of bytes remaining instead
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of -EFAULT.
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Fixes: d5b1a78a772f ("drm/vc4: Add support for drawing 3D frames.")
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Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
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Reviewed-by: Eric Anholt <eric@anholt.net>
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---
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drivers/gpu/drm/vc4/vc4_gem.c | 9 +++++----
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1 file changed, 5 insertions(+), 4 deletions(-)
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diff --git a/drivers/gpu/drm/vc4/vc4_gem.c b/drivers/gpu/drm/vc4/vc4_gem.c
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index ae1609e..4050540 100644
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--- a/drivers/gpu/drm/vc4/vc4_gem.c
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+++ b/drivers/gpu/drm/vc4/vc4_gem.c
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@@ -548,14 +548,15 @@ vc4_cl_lookup_bos(struct drm_device *dev,
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handles = drm_malloc_ab(exec->bo_count, sizeof(uint32_t));
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if (!handles) {
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+ ret = -ENOMEM;
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DRM_ERROR("Failed to allocate incoming GEM handles\n");
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goto fail;
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}
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- ret = copy_from_user(handles,
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- (void __user *)(uintptr_t)args->bo_handles,
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- exec->bo_count * sizeof(uint32_t));
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- if (ret) {
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+ if (copy_from_user(handles,
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+ (void __user *)(uintptr_t)args->bo_handles,
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+ exec->bo_count * sizeof(uint32_t))) {
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+ ret = -EFAULT;
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DRM_ERROR("Failed to copy in GEM handles\n");
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goto fail;
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}
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--
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2.9.3
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