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Subject[PATCH v3 1/2] staging: atomisp2: cleanup null check on memory allocation
For memory allocation functions that fail with a NULL return value, it
is preferred to use the (!x) test in place of (x == NULL).

Changes in atomisp2/css2400/sh_css.c were done by hand.

Done with the help of the following cocci script:

@@
type T;
T* p;
statement s,s1;
@@

p =
\(devm_kzalloc\|devm_ioremap\|usb_alloc_urb\|alloc_netdev\|dev_alloc_skb\|
kmalloc\|kmalloc_array\|kzalloc\|kcalloc\|kmem_cache_alloc\|kmem_cache_zalloc\|
kmem_cache_alloc_node\|kmalloc_node\|kzalloc_node\|devm_kzalloc\)(...)
...when != p

if (
- p == NULL
+ !p
) s
else s1

Signed-off-by: Aishwarya Pant <aishpant@gmail.com>
Acked-by: Julia Lawall <julia.lawall@lip6.fr>
--
Changes in v3:
Rebase changes over atomisp-next branch of the media tree

Changes in atomisp2/css2400/sh_css.c were done by hand, the above script
was not able to match the pattern if (a->b != null).
---
.../media/atomisp/pci/atomisp2/css2400/sh_css.c | 36 +++++++++++-----------
.../atomisp/pci/atomisp2/css2400/sh_css_firmware.c | 7 ++---
.../pci/atomisp2/css2400/sh_css_param_shading.c | 2 +-
3 files changed, 22 insertions(+), 23 deletions(-)

diff --git a/drivers/staging/media/atomisp/pci/atomisp2/css2400/sh_css.c b/drivers/staging/media/atomisp/pci/atomisp2/css2400/sh_css.c
index bee30438e6fd..e61009faff27 100644
--- a/drivers/staging/media/atomisp/pci/atomisp2/css2400/sh_css.c
+++ b/drivers/staging/media/atomisp/pci/atomisp2/css2400/sh_css.c
@@ -5605,13 +5605,13 @@ static enum ia_css_err load_video_binaries(struct ia_css_pipe *pipe)
mycs->num_yuv_scaler = cas_scaler_descr.num_stage;
mycs->yuv_scaler_binary = kzalloc(cas_scaler_descr.num_stage *
sizeof(struct ia_css_binary), GFP_KERNEL);
- if (mycs->yuv_scaler_binary == NULL) {
+ if (!mycs->yuv_scaler_binary) {
err = IA_CSS_ERR_CANNOT_ALLOCATE_MEMORY;
return err;
}
mycs->is_output_stage = kzalloc(cas_scaler_descr.num_stage
* sizeof(bool), GFP_KERNEL);
- if (mycs->is_output_stage == NULL) {
+ if (!mycs->is_output_stage) {
err = IA_CSS_ERR_CANNOT_ALLOCATE_MEMORY;
return err;
}
@@ -6256,14 +6256,14 @@ static enum ia_css_err load_primary_binaries(
mycs->num_yuv_scaler = cas_scaler_descr.num_stage;
mycs->yuv_scaler_binary = kzalloc(cas_scaler_descr.num_stage *
sizeof(struct ia_css_binary), GFP_KERNEL);
- if (mycs->yuv_scaler_binary == NULL) {
+ if (!mycs->yuv_scaler_binary) {
err = IA_CSS_ERR_CANNOT_ALLOCATE_MEMORY;
IA_CSS_LEAVE_ERR_PRIVATE(err);
return err;
}
mycs->is_output_stage = kzalloc(cas_scaler_descr.num_stage *
sizeof(bool), GFP_KERNEL);
- if (mycs->is_output_stage == NULL) {
+ if (!mycs->is_output_stage) {
err = IA_CSS_ERR_CANNOT_ALLOCATE_MEMORY;
IA_CSS_LEAVE_ERR_PRIVATE(err);
return err;
@@ -6980,27 +6980,27 @@ static enum ia_css_err ia_css_pipe_create_cas_scaler_desc_single_output(
}

descr->in_info = kmalloc(descr->num_stage * sizeof(struct ia_css_frame_info), GFP_KERNEL);
- if (descr->in_info == NULL) {
+ if (!descr->in_info) {
err = IA_CSS_ERR_CANNOT_ALLOCATE_MEMORY;
goto ERR;
}
descr->internal_out_info = kmalloc(descr->num_stage * sizeof(struct ia_css_frame_info), GFP_KERNEL);
- if (descr->internal_out_info == NULL) {
+ if (!descr->internal_out_info) {
err = IA_CSS_ERR_CANNOT_ALLOCATE_MEMORY;
goto ERR;
}
descr->out_info = kmalloc(descr->num_stage * sizeof(struct ia_css_frame_info), GFP_KERNEL);
- if (descr->out_info == NULL) {
+ if (!descr->out_info) {
err = IA_CSS_ERR_CANNOT_ALLOCATE_MEMORY;
goto ERR;
}
descr->vf_info = kmalloc(descr->num_stage * sizeof(struct ia_css_frame_info), GFP_KERNEL);
- if (descr->vf_info == NULL) {
+ if (!descr->vf_info) {
err = IA_CSS_ERR_CANNOT_ALLOCATE_MEMORY;
goto ERR;
}
descr->is_output_stage = kmalloc(descr->num_stage * sizeof(bool), GFP_KERNEL);
- if (descr->is_output_stage == NULL) {
+ if (!descr->is_output_stage) {
err = IA_CSS_ERR_CANNOT_ALLOCATE_MEMORY;
goto ERR;
}
@@ -7116,22 +7116,22 @@ static enum ia_css_err ia_css_pipe_create_cas_scaler_desc(struct ia_css_pipe *pi
descr->num_stage = num_stages;

descr->in_info = kmalloc(descr->num_stage * sizeof(struct ia_css_frame_info), GFP_KERNEL);
- if (descr->in_info == NULL) {
+ if (!descr->in_info) {
err = IA_CSS_ERR_CANNOT_ALLOCATE_MEMORY;
goto ERR;
}
descr->internal_out_info = kmalloc(descr->num_stage * sizeof(struct ia_css_frame_info), GFP_KERNEL);
- if (descr->internal_out_info == NULL) {
+ if (!descr->internal_out_info) {
err = IA_CSS_ERR_CANNOT_ALLOCATE_MEMORY;
goto ERR;
}
descr->out_info = kmalloc(descr->num_stage * sizeof(struct ia_css_frame_info), GFP_KERNEL);
- if (descr->out_info == NULL) {
+ if (!descr->out_info) {
err = IA_CSS_ERR_CANNOT_ALLOCATE_MEMORY;
goto ERR;
}
descr->vf_info = kmalloc(descr->num_stage * sizeof(struct ia_css_frame_info), GFP_KERNEL);
- if (descr->vf_info == NULL) {
+ if (!descr->vf_info) {
err = IA_CSS_ERR_CANNOT_ALLOCATE_MEMORY;
goto ERR;
}
@@ -7274,13 +7274,13 @@ load_yuvpp_binaries(struct ia_css_pipe *pipe)
mycs->num_yuv_scaler = cas_scaler_descr.num_stage;
mycs->yuv_scaler_binary = kzalloc(cas_scaler_descr.num_stage *
sizeof(struct ia_css_binary), GFP_KERNEL);
- if (mycs->yuv_scaler_binary == NULL) {
+ if (!mycs->yuv_scaler_binary) {
err = IA_CSS_ERR_CANNOT_ALLOCATE_MEMORY;
goto ERR;
}
mycs->is_output_stage = kzalloc(cas_scaler_descr.num_stage *
sizeof(bool), GFP_KERNEL);
- if (mycs->is_output_stage == NULL) {
+ if (!mycs->is_output_stage) {
err = IA_CSS_ERR_CANNOT_ALLOCATE_MEMORY;
goto ERR;
}
@@ -7381,7 +7381,7 @@ load_yuvpp_binaries(struct ia_css_pipe *pipe)
}
mycs->vf_pp_binary = kzalloc(mycs->num_vf_pp * sizeof(struct ia_css_binary),
GFP_KERNEL);
- if (mycs->vf_pp_binary == NULL) {
+ if (!mycs->vf_pp_binary) {
err = IA_CSS_ERR_CANNOT_ALLOCATE_MEMORY;
goto ERR;
}
@@ -9443,7 +9443,7 @@ ia_css_stream_create(const struct ia_css_stream_config *stream_config,

/* allocate the stream instance */
curr_stream = kmalloc(sizeof(struct ia_css_stream), GFP_KERNEL);
- if (curr_stream == NULL) {
+ if (!curr_stream) {
err = IA_CSS_ERR_CANNOT_ALLOCATE_MEMORY;
IA_CSS_LEAVE_ERR(err);
return err;
@@ -9455,7 +9455,7 @@ ia_css_stream_create(const struct ia_css_stream_config *stream_config,
/* allocate pipes */
curr_stream->num_pipes = num_pipes;
curr_stream->pipes = kzalloc(num_pipes * sizeof(struct ia_css_pipe *), GFP_KERNEL);
- if (curr_stream->pipes == NULL) {
+ if (!curr_stream->pipes) {
curr_stream->num_pipes = 0;
kfree(curr_stream);
curr_stream = NULL;
diff --git a/drivers/staging/media/atomisp/pci/atomisp2/css2400/sh_css_firmware.c b/drivers/staging/media/atomisp/pci/atomisp2/css2400/sh_css_firmware.c
index 5e45d5fe0b2a..383d236c010c 100644
--- a/drivers/staging/media/atomisp/pci/atomisp2/css2400/sh_css_firmware.c
+++ b/drivers/staging/media/atomisp/pci/atomisp2/css2400/sh_css_firmware.c
@@ -147,7 +147,7 @@ sh_css_load_blob_info(const char *fw, const struct ia_css_fw_info *bi, struct ia

char *parambuf = kmalloc(paramstruct_size + configstruct_size + statestruct_size,
GFP_KERNEL);
- if (parambuf == NULL)
+ if (!parambuf)
return IA_CSS_ERR_CANNOT_ALLOCATE_MEMORY;

bd->mem_offsets.array[IA_CSS_PARAM_CLASS_PARAM].ptr = NULL;
@@ -229,7 +229,7 @@ sh_css_load_firmware(const char *fw_data,
sh_css_blob_info = kmalloc(
(sh_css_num_binaries - NUM_OF_SPS) *
sizeof(*sh_css_blob_info), GFP_KERNEL);
- if (sh_css_blob_info == NULL)
+ if (!sh_css_blob_info)
return IA_CSS_ERR_CANNOT_ALLOCATE_MEMORY;
} else {
sh_css_blob_info = NULL;
@@ -237,8 +237,7 @@ sh_css_load_firmware(const char *fw_data,

fw_minibuffer = kcalloc(sh_css_num_binaries, sizeof(struct fw_param),
GFP_KERNEL);
-
- if (fw_minibuffer == NULL)
+ if (!fw_minibuffer)
return IA_CSS_ERR_CANNOT_ALLOCATE_MEMORY;

for (i = 0; i < sh_css_num_binaries; i++) {
diff --git a/drivers/staging/media/atomisp/pci/atomisp2/css2400/sh_css_param_shading.c b/drivers/staging/media/atomisp/pci/atomisp2/css2400/sh_css_param_shading.c
index eaf60e7b2dac..48e2e63c2336 100644
--- a/drivers/staging/media/atomisp/pci/atomisp2/css2400/sh_css_param_shading.c
+++ b/drivers/staging/media/atomisp/pci/atomisp2/css2400/sh_css_param_shading.c
@@ -365,7 +365,7 @@ ia_css_shading_table_alloc(
IA_CSS_ENTER("");

me = kmalloc(sizeof(*me), GFP_KERNEL);
- if (me == NULL) {
+ if (!me) {
IA_CSS_ERROR("out of memory");
return me;
}
--
2.11.0
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