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| author | Rob Clark <robdclark@chromium.org> | 2022-08-07 10:28:48 -0700 |
|---|---|---|
| committer | Rob Clark <robdclark@chromium.org> | 2022-08-28 08:32:11 -0700 |
| commit | 6d29709de8028cfd5a827d02f93a5076ba632563 (patch) | |
| tree | 494bf22109a6d951de0593f0d79162e43a3060e7 /drivers/gpu/drm/msm/msm_drv.c | |
| parent | d95c196ddb6ccd2445760b003e6e8a43cd5e84ba (diff) | |
| download | linux-6d29709de8028cfd5a827d02f93a5076ba632563.tar.bz2 | |
drm/msm: Add fault-injection support
Intended as a way to trigger error paths in mesa.
Signed-off-by: Rob Clark <robdclark@chromium.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Patchwork: https://patchwork.freedesktop.org/patch/496710/
Link: https://lore.kernel.org/r/20220807172848.2432845-1-robdclark@gmail.com
Diffstat (limited to 'drivers/gpu/drm/msm/msm_drv.c')
| -rw-r--r-- | drivers/gpu/drm/msm/msm_drv.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/gpu/drm/msm/msm_drv.c b/drivers/gpu/drm/msm/msm_drv.c index 1ca4a92ba96e..b564ff685f67 100644 --- a/drivers/gpu/drm/msm/msm_drv.c +++ b/drivers/gpu/drm/msm/msm_drv.c @@ -6,6 +6,7 @@ */ #include <linux/dma-mapping.h> +#include <linux/fault-inject.h> #include <linux/kthread.h> #include <linux/sched/mm.h> #include <linux/uaccess.h> @@ -78,6 +79,11 @@ static bool modeset = true; MODULE_PARM_DESC(modeset, "Use kernel modesetting [KMS] (1=on (default), 0=disable)"); module_param(modeset, bool, 0600); +#ifdef CONFIG_FAULT_INJECTION +DECLARE_FAULT_ATTR(fail_gem_alloc); +DECLARE_FAULT_ATTR(fail_gem_iova); +#endif + static irqreturn_t msm_irq(int irq, void *arg) { struct drm_device *dev = arg; @@ -701,6 +707,9 @@ static int msm_ioctl_gem_new(struct drm_device *dev, void *data, flags |= MSM_BO_WC; } + if (should_fail(&fail_gem_alloc, args->size)) + return -ENOMEM; + return msm_gem_new_handle(dev, file, args->size, args->flags, &args->handle, NULL); } @@ -762,6 +771,9 @@ static int msm_ioctl_gem_info_iova(struct drm_device *dev, if (!priv->gpu) return -EINVAL; + if (should_fail(&fail_gem_iova, obj->size)) + return -ENOMEM; + /* * Don't pin the memory here - just get an address so that userspace can * be productive @@ -783,6 +795,9 @@ static int msm_ioctl_gem_info_set_iova(struct drm_device *dev, if (priv->gpu->aspace == ctx->aspace) return -EOPNOTSUPP; + if (should_fail(&fail_gem_iova, obj->size)) + return -ENOMEM; + return msm_gem_set_iova(obj, ctx->aspace, iova); } |