From 4c42d979816a0bc1d87aaabc4089d857942ddfe2 Mon Sep 17 00:00:00 2001 From: Somya Anand Date: Mon, 16 Mar 2015 19:34:11 +0530 Subject: 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 Signed-off-by: Greg Kroah-Hartman --- drivers/staging/nvec/nvec_ps2.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/staging/nvec/nvec_ps2.c') 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; -- cgit v1.2.3