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| author | Somya Anand <somyaanand214@gmail.com> | 2015-03-16 19:34:11 +0530 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-03-16 16:28:47 +0100 |
| commit | 4c42d979816a0bc1d87aaabc4089d857942ddfe2 (patch) | |
| tree | f572c1fd88c7a97db7e6e0b99c9117dc2cd5aec3 /drivers | |
| parent | 6e3f3bb8631600ffc5788a4e9476ea841feac964 (diff) | |
| download | linux-4c42d979816a0bc1d87aaabc4089d857942ddfe2.tar.bz2 | |
Staging: nvec: use !x instead of x == NULL
Functions like devm_kzalloc, kmalloc_array, devm_ioremap,
usb_alloc_urb, alloc_netdev return NULL as a return value on failure.
Generally, When NULL represents failure, !x is commonly used.
This patch cleans up the tests on the results of these functions, thereby
using !x instead of x == NULL or NULL == x. This is done via following
coccinelle script:
@prob_7@
identifier x;
statement S;
@@
(
x = devm_kzalloc(...);
|
x = usb_alloc_urb(...);
|
x = kmalloc_array(...);
|
x = devm_ioremap(...);
|
x = alloc_netdev(...);
)
...
- if(NULL == x)
+ if(!x)
S
Further we have used isomorphism characteristics of coccinelle to
indicate x == NULL and NULL == x are equivalent. This is done via
following iso script.
Expression
@ is_null @ expression X; @@
X == NULL <=> NULL == X
Signed-off-by: Somya Anand <somyaanand214@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/staging/nvec/nvec.c | 2 | ||||
| -rw-r--r-- | drivers/staging/nvec/nvec_paz00.c | 2 | ||||
| -rw-r--r-- | drivers/staging/nvec/nvec_power.c | 2 | ||||
| -rw-r--r-- | drivers/staging/nvec/nvec_ps2.c | 2 |
4 files changed, 4 insertions, 4 deletions
diff --git a/drivers/staging/nvec/nvec.c b/drivers/staging/nvec/nvec.c index 5868ebb8389e..1bdc8d001e65 100644 --- a/drivers/staging/nvec/nvec.c +++ b/drivers/staging/nvec/nvec.c @@ -803,7 +803,7 @@ static int tegra_nvec_probe(struct platform_device *pdev) } nvec = devm_kzalloc(&pdev->dev, sizeof(struct nvec_chip), GFP_KERNEL); - if (nvec == NULL) + if (!nvec) return -ENOMEM; platform_set_drvdata(pdev, nvec); diff --git a/drivers/staging/nvec/nvec_paz00.c b/drivers/staging/nvec/nvec_paz00.c index f0cea0e43c96..68146bfee2b3 100644 --- a/drivers/staging/nvec/nvec_paz00.c +++ b/drivers/staging/nvec/nvec_paz00.c @@ -51,7 +51,7 @@ static int nvec_paz00_probe(struct platform_device *pdev) int ret = 0; led = devm_kzalloc(&pdev->dev, sizeof(*led), GFP_KERNEL); - if (led == NULL) + if (!led) return -ENOMEM; led->cdev.max_brightness = NVEC_LED_MAX; diff --git a/drivers/staging/nvec/nvec_power.c b/drivers/staging/nvec/nvec_power.c index 6a1459d4f8fb..3621b661aba8 100644 --- a/drivers/staging/nvec/nvec_power.c +++ b/drivers/staging/nvec/nvec_power.c @@ -378,7 +378,7 @@ static int nvec_power_probe(struct platform_device *pdev) struct nvec_chip *nvec = dev_get_drvdata(pdev->dev.parent); power = devm_kzalloc(&pdev->dev, sizeof(struct nvec_power), GFP_NOWAIT); - if (power == NULL) + if (!power) return -ENOMEM; dev_set_drvdata(&pdev->dev, power); diff --git a/drivers/staging/nvec/nvec_ps2.c b/drivers/staging/nvec/nvec_ps2.c index 4fd63c239454..6ebbc82323c3 100644 --- a/drivers/staging/nvec/nvec_ps2.c +++ b/drivers/staging/nvec/nvec_ps2.c @@ -109,7 +109,7 @@ static int nvec_mouse_probe(struct platform_device *pdev) char mouse_reset[] = { NVEC_PS2, SEND_COMMAND, PSMOUSE_RST, 3 }; ser_dev = devm_kzalloc(&pdev->dev, sizeof(struct serio), GFP_KERNEL); - if (ser_dev == NULL) + if (!ser_dev) return -ENOMEM; ser_dev->id.type = SERIO_PS_PSTHRU; |