drm/amd/display: Use kvzalloc for potentially large allocations

Allocating up to 32 physically contiguous pages can easily fail (and has
failed for me), and isn't necessary anyway.

Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Michel Dänzer <michel.daenzer@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_surface.c b/drivers/gpu/drm/amd/display/dc/core/dc_surface.c
index ade5b8ee9c3c0ead9272204360e9372208ba2b50..132eef3826e2d99b71115d509e887887e9eb220b 100644 (file)
--- a/drivers/gpu/drm/amd/display/dc/core/dc_surface.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_surface.c
@@ -66,8 +66,8 @@ struct dc_plane_state *dc_create_plane_state(struct dc *dc)
 {
        struct dc *core_dc = dc;
 
-       struct dc_plane_state *plane_state = kzalloc(sizeof(*plane_state),
-                                                    GFP_KERNEL);
+       struct dc_plane_state *plane_state = kvzalloc(sizeof(*plane_state),
+                                                     GFP_KERNEL);
 
        if (NULL == plane_state)
                return NULL;
@@ -120,7 +120,7 @@ static void dc_plane_state_free(struct kref *kref)
 {
        struct dc_plane_state *plane_state = container_of(kref, struct dc_plane_state, refcount);
        destruct(plane_state);
-       kfree(plane_state);
+       kvfree(plane_state);
 }
 
 void dc_plane_state_release(struct dc_plane_state *plane_state)
@@ -136,7 +136,7 @@ void dc_gamma_retain(struct dc_gamma *gamma)
 static void dc_gamma_free(struct kref *kref)
 {
        struct dc_gamma *gamma = container_of(kref, struct dc_gamma, refcount);
-       kfree(gamma);
+       kvfree(gamma);
 }
 
 void dc_gamma_release(struct dc_gamma **gamma)
@@ -147,7 +147,7 @@ void dc_gamma_release(struct dc_gamma **gamma)
 
 struct dc_gamma *dc_create_gamma(void)
 {
-       struct dc_gamma *gamma = kzalloc(sizeof(*gamma), GFP_KERNEL);
+       struct dc_gamma *gamma = kvzalloc(sizeof(*gamma), GFP_KERNEL);
 
        if (gamma == NULL)
                goto alloc_fail;
@@ -167,7 +167,7 @@ void dc_transfer_func_retain(struct dc_transfer_func *tf)
 static void dc_transfer_func_free(struct kref *kref)
 {
        struct dc_transfer_func *tf = container_of(kref, struct dc_transfer_func, refcount);
-       kfree(tf);
+       kvfree(tf);
 }
 
 void dc_transfer_func_release(struct dc_transfer_func *tf)
@@ -177,7 +177,7 @@ void dc_transfer_func_release(struct dc_transfer_func *tf)
 
 struct dc_transfer_func *dc_create_transfer_func(void)
 {
-       struct dc_transfer_func *tf = kzalloc(sizeof(*tf), GFP_KERNEL);
+       struct dc_transfer_func *tf = kvzalloc(sizeof(*tf), GFP_KERNEL);
 
        if (tf == NULL)
                goto alloc_fail;

diff --git a/drivers/gpu/drm/amd/display/modules/color/color_gamma.c b/drivers/gpu/drm/amd/display/modules/color/color_gamma.c
index e7e374f5686449d5ef6f596c8a4aa92a9e40ec2a..b3747a019debf8fe7336b408fdaa032e9feae056 100644 (file)
--- a/drivers/gpu/drm/amd/display/modules/color/color_gamma.c
+++ b/drivers/gpu/drm/amd/display/modules/color/color_gamma.c
@@ -1093,19 +1093,19 @@ bool mod_color_calculate_regamma_params(struct dc_transfer_func *output_tf,
 
        output_tf->type = TF_TYPE_DISTRIBUTED_POINTS;
 
-       rgb_user = kzalloc(sizeof(*rgb_user) * (ramp->num_entries + _EXTRA_POINTS),
-                          GFP_KERNEL);
+       rgb_user = kvzalloc(sizeof(*rgb_user) * (ramp->num_entries + _EXTRA_POINTS),
+                           GFP_KERNEL);
        if (!rgb_user)
                goto rgb_user_alloc_fail;
-       rgb_regamma = kzalloc(sizeof(*rgb_regamma) * (MAX_HW_POINTS + _EXTRA_POINTS),
-                       GFP_KERNEL);
+       rgb_regamma = kvzalloc(sizeof(*rgb_regamma) * (MAX_HW_POINTS + _EXTRA_POINTS),
+                              GFP_KERNEL);
        if (!rgb_regamma)
                goto rgb_regamma_alloc_fail;
-       axix_x = kzalloc(sizeof(*axix_x) * (ramp->num_entries + 3),
-                        GFP_KERNEL);
+       axix_x = kvzalloc(sizeof(*axix_x) * (ramp->num_entries + 3),
+                         GFP_KERNEL);
        if (!axix_x)
                goto axix_x_alloc_fail;
-       coeff = kzalloc(sizeof(*coeff) * (MAX_HW_POINTS + _EXTRA_POINTS), GFP_KERNEL);
+       coeff = kvzalloc(sizeof(*coeff) * (MAX_HW_POINTS + _EXTRA_POINTS), GFP_KERNEL);
        if (!coeff)
                goto coeff_alloc_fail;
 
@@ -1157,13 +1157,13 @@ bool mod_color_calculate_regamma_params(struct dc_transfer_func *output_tf,
 
        ret = true;
 
-       kfree(coeff);
+       kvfree(coeff);
 coeff_alloc_fail:
-       kfree(axix_x);
+       kvfree(axix_x);
 axix_x_alloc_fail:
-       kfree(rgb_regamma);
+       kvfree(rgb_regamma);
 rgb_regamma_alloc_fail:
-       kfree(rgb_user);
+       kvfree(rgb_user);
 rgb_user_alloc_fail:
        return ret;
 }
@@ -1192,19 +1192,19 @@ bool mod_color_calculate_degamma_params(struct dc_transfer_func *input_tf,
 
        input_tf->type = TF_TYPE_DISTRIBUTED_POINTS;
 
-       rgb_user = kzalloc(sizeof(*rgb_user) * (ramp->num_entries + _EXTRA_POINTS),
-                          GFP_KERNEL);
+       rgb_user = kvzalloc(sizeof(*rgb_user) * (ramp->num_entries + _EXTRA_POINTS),
+                           GFP_KERNEL);
        if (!rgb_user)
                goto rgb_user_alloc_fail;
-       curve = kzalloc(sizeof(*curve) * (MAX_HW_POINTS + _EXTRA_POINTS),
-                       GFP_KERNEL);
+       curve = kvzalloc(sizeof(*curve) * (MAX_HW_POINTS + _EXTRA_POINTS),
+                        GFP_KERNEL);
        if (!curve)
                goto curve_alloc_fail;
-       axix_x = kzalloc(sizeof(*axix_x) * (ramp->num_entries + _EXTRA_POINTS),
-                        GFP_KERNEL);
+       axix_x = kvzalloc(sizeof(*axix_x) * (ramp->num_entries + _EXTRA_POINTS),
+                         GFP_KERNEL);
        if (!axix_x)
                goto axix_x_alloc_fail;
-       coeff = kzalloc(sizeof(*coeff) * (MAX_HW_POINTS + _EXTRA_POINTS), GFP_KERNEL);
+       coeff = kvzalloc(sizeof(*coeff) * (MAX_HW_POINTS + _EXTRA_POINTS), GFP_KERNEL);
        if (!coeff)
                goto coeff_alloc_fail;
 
@@ -1246,13 +1246,13 @@ bool mod_color_calculate_degamma_params(struct dc_transfer_func *input_tf,
 
        ret = true;
 
-       kfree(coeff);
+       kvfree(coeff);
 coeff_alloc_fail:
-       kfree(axix_x);
+       kvfree(axix_x);
 axix_x_alloc_fail:
-       kfree(curve);
+       kvfree(curve);
 curve_alloc_fail:
-       kfree(rgb_user);
+       kvfree(rgb_user);
 rgb_user_alloc_fail:
 
        return ret;
@@ -1281,8 +1281,9 @@ bool  mod_color_calculate_curve(enum dc_transfer_func_predefined trans,
                }
                ret = true;
        } else if (trans == TRANSFER_FUNCTION_PQ) {
-               rgb_regamma = kzalloc(sizeof(*rgb_regamma) * (MAX_HW_POINTS +
-                                               _EXTRA_POINTS), GFP_KERNEL);
+               rgb_regamma = kvzalloc(sizeof(*rgb_regamma) *
+                                      (MAX_HW_POINTS + _EXTRA_POINTS),
+                                      GFP_KERNEL);
                if (!rgb_regamma)
                        goto rgb_regamma_alloc_fail;
                points->end_exponent = 7;
@@ -1302,11 +1303,12 @@ bool  mod_color_calculate_curve(enum dc_transfer_func_predefined trans,
                }
                ret = true;
 
-               kfree(rgb_regamma);
+               kvfree(rgb_regamma);
        } else if (trans == TRANSFER_FUNCTION_SRGB ||
                          trans == TRANSFER_FUNCTION_BT709) {
-               rgb_regamma = kzalloc(sizeof(*rgb_regamma) * (MAX_HW_POINTS +
-                                               _EXTRA_POINTS), GFP_KERNEL);
+               rgb_regamma = kvzalloc(sizeof(*rgb_regamma) *
+                                      (MAX_HW_POINTS + _EXTRA_POINTS),
+                                      GFP_KERNEL);
                if (!rgb_regamma)
                        goto rgb_regamma_alloc_fail;
                points->end_exponent = 0;
@@ -1324,7 +1326,7 @@ bool  mod_color_calculate_curve(enum dc_transfer_func_predefined trans,
                }
                ret = true;
 
-               kfree(rgb_regamma);
+               kvfree(rgb_regamma);
        }
 rgb_regamma_alloc_fail:
        return ret;
@@ -1348,8 +1350,9 @@ bool  mod_color_calculate_degamma_curve(enum dc_transfer_func_predefined trans,
                }
                ret = true;
        } else if (trans == TRANSFER_FUNCTION_PQ) {
-               rgb_degamma = kzalloc(sizeof(*rgb_degamma) * (MAX_HW_POINTS +
-                                               _EXTRA_POINTS), GFP_KERNEL);
+               rgb_degamma = kvzalloc(sizeof(*rgb_degamma) *
+                                      (MAX_HW_POINTS + _EXTRA_POINTS),
+                                      GFP_KERNEL);
                if (!rgb_degamma)
                        goto rgb_degamma_alloc_fail;
 
@@ -1364,11 +1367,12 @@ bool  mod_color_calculate_degamma_curve(enum dc_transfer_func_predefined trans,
                }
                ret = true;
 
-               kfree(rgb_degamma);
+               kvfree(rgb_degamma);
        } else if (trans == TRANSFER_FUNCTION_SRGB ||
                          trans == TRANSFER_FUNCTION_BT709) {
-               rgb_degamma = kzalloc(sizeof(*rgb_degamma) * (MAX_HW_POINTS +
-                                               _EXTRA_POINTS), GFP_KERNEL);
+               rgb_degamma = kvzalloc(sizeof(*rgb_degamma) *
+                                      (MAX_HW_POINTS + _EXTRA_POINTS),
+                                      GFP_KERNEL);
                if (!rgb_degamma)
                        goto rgb_degamma_alloc_fail;
 
@@ -1382,7 +1386,7 @@ bool  mod_color_calculate_degamma_curve(enum dc_transfer_func_predefined trans,
                }
                ret = true;
 
-               kfree(rgb_degamma);
+               kvfree(rgb_degamma);
        }
        points->end_exponent = 0;
        points->x_point_at_y1_red = 1;