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drm/i915: add a helper to free the members of i915_params

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Abstract the one user in anticipation of more. Set the dangling pointers
to NULL while at it.

Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/8637d1e5049dc003718772f19d664aeaf9540856.1545920737.git.jani.nikula@intel.com
This commit is contained in:
Jani Nikula 2018-12-27 16:33:38 +02:00
parent 4081cef923
commit 16cabb12f2
3 changed files with 18 additions and 8 deletions
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9
drivers/gpu/drm/i915/i915_gpu_error.c
View file

@ -963,17 +963,10 @@ static void i915_error_object_free(struct drm_i915_error_object *obj)
kfree(obj);
}
static __always_inline void free_param(const char *type, void *x)
{
if (!__builtin_strcmp(type, "char *"))
kfree(*(void **)x);
}
static void cleanup_params(struct i915_gpu_state *error)
{
#define FREE(T, x, ...) free_param(#T, &error->params.x);
I915_PARAMS_FOR_EACH(FREE);
#undef FREE
i915_params_free(&error->params);
}
static void cleanup_uc_state(struct i915_gpu_state *error)

16
drivers/gpu/drm/i915/i915_params.c
View file

@ -217,3 +217,19 @@ void i915_params_copy(struct i915_params *dest, const struct i915_params *src)
I915_PARAMS_FOR_EACH(DUP);
#undef DUP
}
static __always_inline void free_param(const char *type, void *x)
{
if (!__builtin_strcmp(type, "char *")) {
kfree(*(void **)x);
*(void **)x = NULL;
}
}
/* free the allocated members, *not* the passed in params itself */
void i915_params_free(struct i915_params *params)
{
#define FREE(T, x, ...) free_param(#T, &params->x);
I915_PARAMS_FOR_EACH(FREE);
#undef FREE
}

1
drivers/gpu/drm/i915/i915_params.h
View file

@ -79,6 +79,7 @@ extern struct i915_params i915_modparams __read_mostly;
void i915_params_dump(const struct i915_params *params, struct drm_printer *p);
void i915_params_copy(struct i915_params *dest, const struct i915_params *src);
void i915_params_free(struct i915_params *params);
#endif