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treewide: devm_kzalloc() -> devm_kcalloc()

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The devm_kzalloc() function has a 2-factor argument form, devm_kcalloc().
This patch replaces cases of:

        devm_kzalloc(handle, a * b, gfp)

with:
        devm_kcalloc(handle, a * b, gfp)

as well as handling cases of:

        devm_kzalloc(handle, a * b * c, gfp)

with:

        devm_kzalloc(handle, array3_size(a, b, c), gfp)

as it's slightly less ugly than:

        devm_kcalloc(handle, array_size(a, b), c, gfp)

This does, however, attempt to ignore constant size factors like:

        devm_kzalloc(handle, 4 * 1024, gfp)

though any constants defined via macros get caught up in the conversion.

Any factors with a sizeof() of "unsigned char", "char", and "u8" were
dropped, since they're redundant.

Some manual whitespace fixes were needed in this patch, as Coccinelle
really liked to write "=devm_kcalloc..." instead of "= devm_kcalloc...".

The Coccinelle script used for this was:

// Fix redundant parens around sizeof().
@@
expression HANDLE;
type TYPE;
expression THING, E;
@@

(
  devm_kzalloc(HANDLE,
-	(sizeof(TYPE)) * E
+	sizeof(TYPE) * E
  , ...)
|
  devm_kzalloc(HANDLE,
-	(sizeof(THING)) * E
+	sizeof(THING) * E
  , ...)
)

// Drop single-byte sizes and redundant parens.
@@
expression HANDLE;
expression COUNT;
typedef u8;
typedef __u8;
@@

(
  devm_kzalloc(HANDLE,
-	sizeof(u8) * (COUNT)
+	COUNT
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(__u8) * (COUNT)
+	COUNT
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(char) * (COUNT)
+	COUNT
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(unsigned char) * (COUNT)
+	COUNT
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(u8) * COUNT
+	COUNT
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(__u8) * COUNT
+	COUNT
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(char) * COUNT
+	COUNT
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(unsigned char) * COUNT
+	COUNT
  , ...)
)

// 2-factor product with sizeof(type/expression) and identifier or constant.
@@
expression HANDLE;
type TYPE;
expression THING;
identifier COUNT_ID;
constant COUNT_CONST;
@@

(
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	sizeof(TYPE) * (COUNT_ID)
+	COUNT_ID, sizeof(TYPE)
  , ...)
|
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	sizeof(TYPE) * COUNT_ID
+	COUNT_ID, sizeof(TYPE)
  , ...)
|
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	sizeof(TYPE) * (COUNT_CONST)
+	COUNT_CONST, sizeof(TYPE)
  , ...)
|
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	sizeof(TYPE) * COUNT_CONST
+	COUNT_CONST, sizeof(TYPE)
  , ...)
|
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	sizeof(THING) * (COUNT_ID)
+	COUNT_ID, sizeof(THING)
  , ...)
|
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	sizeof(THING) * COUNT_ID
+	COUNT_ID, sizeof(THING)
  , ...)
|
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	sizeof(THING) * (COUNT_CONST)
+	COUNT_CONST, sizeof(THING)
  , ...)
|
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	sizeof(THING) * COUNT_CONST
+	COUNT_CONST, sizeof(THING)
  , ...)
)

// 2-factor product, only identifiers.
@@
expression HANDLE;
identifier SIZE, COUNT;
@@

- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	SIZE * COUNT
+	COUNT, SIZE
  , ...)

// 3-factor product with 1 sizeof(type) or sizeof(expression), with
// redundant parens removed.
@@
expression HANDLE;
expression THING;
identifier STRIDE, COUNT;
type TYPE;
@@

(
  devm_kzalloc(HANDLE,
-	sizeof(TYPE) * (COUNT) * (STRIDE)
+	array3_size(COUNT, STRIDE, sizeof(TYPE))
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(TYPE) * (COUNT) * STRIDE
+	array3_size(COUNT, STRIDE, sizeof(TYPE))
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(TYPE) * COUNT * (STRIDE)
+	array3_size(COUNT, STRIDE, sizeof(TYPE))
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(TYPE) * COUNT * STRIDE
+	array3_size(COUNT, STRIDE, sizeof(TYPE))
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(THING) * (COUNT) * (STRIDE)
+	array3_size(COUNT, STRIDE, sizeof(THING))
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(THING) * (COUNT) * STRIDE
+	array3_size(COUNT, STRIDE, sizeof(THING))
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(THING) * COUNT * (STRIDE)
+	array3_size(COUNT, STRIDE, sizeof(THING))
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(THING) * COUNT * STRIDE
+	array3_size(COUNT, STRIDE, sizeof(THING))
  , ...)
)

// 3-factor product with 2 sizeof(variable), with redundant parens removed.
@@
expression HANDLE;
expression THING1, THING2;
identifier COUNT;
type TYPE1, TYPE2;
@@

(
  devm_kzalloc(HANDLE,
-	sizeof(TYPE1) * sizeof(TYPE2) * COUNT
+	array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2))
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(TYPE1) * sizeof(THING2) * (COUNT)
+	array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2))
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(THING1) * sizeof(THING2) * COUNT
+	array3_size(COUNT, sizeof(THING1), sizeof(THING2))
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(THING1) * sizeof(THING2) * (COUNT)
+	array3_size(COUNT, sizeof(THING1), sizeof(THING2))
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(TYPE1) * sizeof(THING2) * COUNT
+	array3_size(COUNT, sizeof(TYPE1), sizeof(THING2))
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(TYPE1) * sizeof(THING2) * (COUNT)
+	array3_size(COUNT, sizeof(TYPE1), sizeof(THING2))
  , ...)
)

// 3-factor product, only identifiers, with redundant parens removed.
@@
expression HANDLE;
identifier STRIDE, SIZE, COUNT;
@@

(
  devm_kzalloc(HANDLE,
-	(COUNT) * STRIDE * SIZE
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  devm_kzalloc(HANDLE,
-	COUNT * (STRIDE) * SIZE
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  devm_kzalloc(HANDLE,
-	COUNT * STRIDE * (SIZE)
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  devm_kzalloc(HANDLE,
-	(COUNT) * (STRIDE) * SIZE
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  devm_kzalloc(HANDLE,
-	COUNT * (STRIDE) * (SIZE)
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  devm_kzalloc(HANDLE,
-	(COUNT) * STRIDE * (SIZE)
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  devm_kzalloc(HANDLE,
-	(COUNT) * (STRIDE) * (SIZE)
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  devm_kzalloc(HANDLE,
-	COUNT * STRIDE * SIZE
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
)

// Any remaining multi-factor products, first at least 3-factor products,
// when they're not all constants...
@@
expression HANDLE;
expression E1, E2, E3;
constant C1, C2, C3;
@@

(
  devm_kzalloc(HANDLE, C1 * C2 * C3, ...)
|
  devm_kzalloc(HANDLE,
-	(E1) * E2 * E3
+	array3_size(E1, E2, E3)
  , ...)
|
  devm_kzalloc(HANDLE,
-	(E1) * (E2) * E3
+	array3_size(E1, E2, E3)
  , ...)
|
  devm_kzalloc(HANDLE,
-	(E1) * (E2) * (E3)
+	array3_size(E1, E2, E3)
  , ...)
|
  devm_kzalloc(HANDLE,
-	E1 * E2 * E3
+	array3_size(E1, E2, E3)
  , ...)
)

// And then all remaining 2 factors products when they're not all constants,
// keeping sizeof() as the second factor argument.
@@
expression HANDLE;
expression THING, E1, E2;
type TYPE;
constant C1, C2, C3;
@@

(
  devm_kzalloc(HANDLE, sizeof(THING) * C2, ...)
|
  devm_kzalloc(HANDLE, sizeof(TYPE) * C2, ...)
|
  devm_kzalloc(HANDLE, C1 * C2 * C3, ...)
|
  devm_kzalloc(HANDLE, C1 * C2, ...)
|
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	sizeof(TYPE) * (E2)
+	E2, sizeof(TYPE)
  , ...)
|
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	sizeof(TYPE) * E2
+	E2, sizeof(TYPE)
  , ...)
|
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	sizeof(THING) * (E2)
+	E2, sizeof(THING)
  , ...)
|
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	sizeof(THING) * E2
+	E2, sizeof(THING)
  , ...)
|
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	(E1) * E2
+	E1, E2
  , ...)
|
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	(E1) * (E2)
+	E1, E2
  , ...)
|
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	E1 * E2
+	E1, E2
  , ...)
)

Signed-off-by: Kees Cook <[email protected]>
This commit is contained in:
Kees Cook 2018-06-12 14:07:58 -07:00
commit a86854d0c5
229 changed files with 847 additions and 664 deletions
Download patch file Download diff file Expand all files Collapse all files

2
drivers/media/i2c/s5k5baf.c
View file

@ -373,7 +373,7 @@ static int s5k5baf_fw_parse(struct device *dev, struct s5k5baf_fw **fw,
data += S5K5BAG_FW_TAG_LEN;
count -= S5K5BAG_FW_TAG_LEN;
d = devm_kzalloc(dev, count * sizeof(u16), GFP_KERNEL);
d = devm_kcalloc(dev, count, sizeof(u16), GFP_KERNEL);
if (!d)
return -ENOMEM;

6
drivers/media/platform/am437x/am437x-vpfe.c
View file

@ -2586,8 +2586,10 @@ static int vpfe_probe(struct platform_device *pdev)
pm_runtime_put_sync(&pdev->dev);
vpfe->sd = devm_kzalloc(&pdev->dev, sizeof(struct v4l2_subdev *) *
ARRAY_SIZE(vpfe->cfg->asd), GFP_KERNEL);
vpfe->sd = devm_kcalloc(&pdev->dev,
ARRAY_SIZE(vpfe->cfg->asd),
sizeof(struct v4l2_subdev *),
GFP_KERNEL);
if (!vpfe->sd) {
ret = -ENOMEM;
goto probe_out_v4l2_unregister;

10
drivers/media/platform/davinci/vpif_capture.c
View file

@ -1528,8 +1528,10 @@ vpif_capture_get_pdata(struct platform_device *pdev)
if (!pdata)
return NULL;
pdata->subdev_info =
devm_kzalloc(&pdev->dev, sizeof(*pdata->subdev_info) *
VPIF_CAPTURE_NUM_CHANNELS, GFP_KERNEL);
devm_kcalloc(&pdev->dev,
VPIF_CAPTURE_NUM_CHANNELS,
sizeof(*pdata->subdev_info),
GFP_KERNEL);
if (!pdata->subdev_info)
return NULL;
@ -1546,9 +1548,9 @@ vpif_capture_get_pdata(struct platform_device *pdev)
sdinfo = &pdata->subdev_info[i];
chan = &pdata->chan_config[i];
chan->inputs = devm_kzalloc(&pdev->dev,
sizeof(*chan->inputs) *
chan->inputs = devm_kcalloc(&pdev->dev,
VPIF_CAPTURE_NUM_CHANNELS,
sizeof(*chan->inputs),
GFP_KERNEL);
if (!chan->inputs)
return NULL;

8
drivers/media/platform/qcom/camss-8x16/camss-csid.c
View file

@ -845,7 +845,7 @@ int msm_csid_subdev_init(struct csid_device *csid,
while (res->clock[csid->nclocks])
csid->nclocks++;
csid->clock = devm_kzalloc(dev, csid->nclocks * sizeof(*csid->clock),
csid->clock = devm_kcalloc(dev, csid->nclocks, sizeof(*csid->clock),
GFP_KERNEL);
if (!csid->clock)
return -ENOMEM;
@ -868,8 +868,10 @@ int msm_csid_subdev_init(struct csid_device *csid,
continue;
}
clock->freq = devm_kzalloc(dev, clock->nfreqs *
sizeof(*clock->freq), GFP_KERNEL);
clock->freq = devm_kcalloc(dev,
clock->nfreqs,
sizeof(*clock->freq),
GFP_KERNEL);
if (!clock->freq)
return -ENOMEM;

11
drivers/media/platform/qcom/camss-8x16/camss-csiphy.c
View file

@ -732,8 +732,9 @@ int msm_csiphy_subdev_init(struct csiphy_device *csiphy,
while (res->clock[csiphy->nclocks])
csiphy->nclocks++;
csiphy->clock = devm_kzalloc(dev, csiphy->nclocks *
sizeof(*csiphy->clock), GFP_KERNEL);
csiphy->clock = devm_kcalloc(dev,
csiphy->nclocks, sizeof(*csiphy->clock),
GFP_KERNEL);
if (!csiphy->clock)
return -ENOMEM;
@ -755,8 +756,10 @@ int msm_csiphy_subdev_init(struct csiphy_device *csiphy,
continue;
}
clock->freq = devm_kzalloc(dev, clock->nfreqs *
sizeof(*clock->freq), GFP_KERNEL);
clock->freq = devm_kcalloc(dev,
clock->nfreqs,
sizeof(*clock->freq),
GFP_KERNEL);
if (!clock->freq)
return -ENOMEM;

9
drivers/media/platform/qcom/camss-8x16/camss-ispif.c
View file

@ -948,7 +948,8 @@ int msm_ispif_subdev_init(struct ispif_device *ispif,
while (res->clock[ispif->nclocks])
ispif->nclocks++;
ispif->clock = devm_kzalloc(dev, ispif->nclocks * sizeof(*ispif->clock),
ispif->clock = devm_kcalloc(dev,
ispif->nclocks, sizeof(*ispif->clock),
GFP_KERNEL);
if (!ispif->clock)
return -ENOMEM;
@ -968,8 +969,10 @@ int msm_ispif_subdev_init(struct ispif_device *ispif,
while (res->clock_for_reset[ispif->nclocks_for_reset])
ispif->nclocks_for_reset++;
ispif->clock_for_reset = devm_kzalloc(dev, ispif->nclocks_for_reset *
sizeof(*ispif->clock_for_reset), GFP_KERNEL);
ispif->clock_for_reset = devm_kcalloc(dev,
ispif->nclocks_for_reset,
sizeof(*ispif->clock_for_reset),
GFP_KERNEL);
if (!ispif->clock_for_reset)
return -ENOMEM;

8
drivers/media/platform/qcom/camss-8x16/camss-vfe.c
View file

@ -2794,7 +2794,7 @@ int msm_vfe_subdev_init(struct vfe_device *vfe, const struct resources *res)
while (res->clock[vfe->nclocks])
vfe->nclocks++;
vfe->clock = devm_kzalloc(dev, vfe->nclocks * sizeof(*vfe->clock),
vfe->clock = devm_kcalloc(dev, vfe->nclocks, sizeof(*vfe->clock),
GFP_KERNEL);
if (!vfe->clock)
return -ENOMEM;
@ -2817,8 +2817,10 @@ int msm_vfe_subdev_init(struct vfe_device *vfe, const struct resources *res)
continue;
}
clock->freq = devm_kzalloc(dev, clock->nfreqs *
sizeof(*clock->freq), GFP_KERNEL);
clock->freq = devm_kcalloc(dev,
clock->nfreqs,
sizeof(*clock->freq),
GFP_KERNEL);
if (!clock->freq)
return -ENOMEM;

3
drivers/media/platform/qcom/camss-8x16/camss.c
View file

@ -271,7 +271,8 @@ static int camss_of_parse_endpoint_node(struct device *dev,
lncfg->clk.pol = mipi_csi2->lane_polarities[0];
lncfg->num_data = mipi_csi2->num_data_lanes;
lncfg->data = devm_kzalloc(dev, lncfg->num_data * sizeof(*lncfg->data),
lncfg->data = devm_kcalloc(dev,
lncfg->num_data, sizeof(*lncfg->data),
GFP_KERNEL);
if (!lncfg->data)
return -ENOMEM;

3
drivers/media/platform/vsp1/vsp1_entity.c
View file

@ -630,7 +630,8 @@ int vsp1_entity_init(struct vsp1_device *vsp1, struct vsp1_entity *entity,
entity->source_pad = num_pads - 1;
/* Allocate and initialize pads. */
entity->pads = devm_kzalloc(vsp1->dev, num_pads * sizeof(*entity->pads),
entity->pads = devm_kcalloc(vsp1->dev,
num_pads, sizeof(*entity->pads),
GFP_KERNEL);
if (entity->pads == NULL)
return -ENOMEM;

2
drivers/media/platform/xilinx/xilinx-vipp.c
View file

@ -532,7 +532,7 @@ static int xvip_graph_init(struct xvip_composite_device *xdev)
/* Register the subdevices notifier. */
num_subdevs = xdev->num_subdevs;
subdevs = devm_kzalloc(xdev->dev, sizeof(*subdevs) * num_subdevs,
subdevs = devm_kcalloc(xdev->dev, num_subdevs, sizeof(*subdevs),
GFP_KERNEL);
if (subdevs == NULL) {
ret = -ENOMEM;

7
drivers/media/v4l2-core/v4l2-flash-led-class.c
View file

@ -412,9 +412,10 @@ static int v4l2_flash_init_controls(struct v4l2_flash *v4l2_flash,
struct v4l2_ctrl_config *ctrl_cfg;
int i, ret, num_ctrls = 0;
v4l2_flash->ctrls = devm_kzalloc(v4l2_flash->sd.dev,
sizeof(*v4l2_flash->ctrls) *
(STROBE_SOURCE + 1), GFP_KERNEL);
v4l2_flash->ctrls = devm_kcalloc(v4l2_flash->sd.dev,
STROBE_SOURCE + 1,
sizeof(*v4l2_flash->ctrls),
GFP_KERNEL);
if (!v4l2_flash->ctrls)
return -ENOMEM;