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From: "Uwe Kleine-König" <u.kleine-koenig@pengutronix.de>
To: barebox@lists.infradead.org
Subject: [PATCH] remove checks for xzalloc() returning NULL
Date: Mon, 25 Sep 2017 12:02:35 +0200	[thread overview]
Message-ID: <20170925100235.17848-1-u.kleine-koenig@pengutronix.de> (raw)

xzalloc() either returns memory or panics, so checking for NULL is useless.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
---
 common/state/backend_bucket_circular.c | 2 --
 common/state/backend_format_dtb.c      | 2 --
 common/state/backend_format_raw.c      | 4 ----
 drivers/clk/mxs/clk-div.c              | 2 --
 drivers/clk/mxs/clk-pll.c              | 2 --
 drivers/clk/mxs/clk-ref.c              | 2 --
 drivers/gpio/gpio-clps711x.c           | 2 --
 drivers/gpio/gpio-generic.c            | 2 --
 drivers/gpio/gpio-vf610.c              | 2 --
 drivers/mtd/nand/atmel_nand.c          | 2 --
 drivers/net/gianfar.c                  | 3 ---
 drivers/of/base.c                      | 2 --
 drivers/pci/pci-imx6.c                 | 2 --
 drivers/pinctrl/pinctrl-rockchip.c     | 2 --
 drivers/usb/gadget/pxa27x_udc.c        | 2 --
 drivers/usb/musb/musb_host.c           | 2 --
 drivers/usb/musb/phy-am335x-control.c  | 4 ----
 drivers/usb/musb/phy-am335x.c          | 2 --
 drivers/video/backlight-pwm.c          | 2 --
 drivers/video/tc358767.c               | 2 --
 fs/omap4_usbbootfs.c                   | 2 --
 fs/pstore/fs.c                         | 2 --
 22 files changed, 49 deletions(-)

diff --git a/common/state/backend_bucket_circular.c b/common/state/backend_bucket_circular.c
index f83bd679d788..232490325523 100644
--- a/common/state/backend_bucket_circular.c
+++ b/common/state/backend_bucket_circular.c
@@ -310,8 +310,6 @@ static int state_backend_bucket_circular_write(struct state_backend_storage_buck
 	 * random changes
 	 */
 	write_buf = xzalloc(written_length);
-	if (!write_buf)
-		return -ENOMEM;
 
 	memcpy(write_buf, buf, len);
 	meta = (struct state_backend_storage_bucket_circular_meta *)
diff --git a/common/state/backend_format_dtb.c b/common/state/backend_format_dtb.c
index 4c9d2eefc780..48f30db1f5f9 100644
--- a/common/state/backend_format_dtb.c
+++ b/common/state/backend_format_dtb.c
@@ -136,8 +136,6 @@ int backend_format_dtb_create(struct state_backend_format **format,
 	struct state_backend_format_dtb *dtb;
 
 	dtb = xzalloc(sizeof(*dtb));
-	if (!dtb)
-		return -ENOMEM;
 
 	dtb->dev = dev;
 	dtb->format.pack = state_backend_format_dtb_pack;
diff --git a/common/state/backend_format_raw.c b/common/state/backend_format_raw.c
index 2ba97e08a0ae..4369f76e376f 100644
--- a/common/state/backend_format_raw.c
+++ b/common/state/backend_format_raw.c
@@ -222,8 +222,6 @@ static int backend_format_raw_pack(struct state_backend_format *format,
 	size_full = size_data + sizeof(*header) + backend_raw->digest_length;
 
 	buf = xzalloc(size_full);
-	if (!buf)
-		return -ENOMEM;
 
 	header = buf;
 	data = buf + sizeof(*header);
@@ -308,8 +306,6 @@ int backend_format_raw_create(struct state_backend_format **format,
 	int ret;
 
 	raw = xzalloc(sizeof(*raw));
-	if (!raw)
-		return -ENOMEM;
 
 	raw->dev = dev;
 	ret = backend_format_raw_init_digest(raw, node, secret_name);
diff --git a/drivers/clk/mxs/clk-div.c b/drivers/clk/mxs/clk-div.c
index e8dae25da5ff..797e5a274fd0 100644
--- a/drivers/clk/mxs/clk-div.c
+++ b/drivers/clk/mxs/clk-div.c
@@ -86,8 +86,6 @@ struct clk *mxs_clk_div(const char *name, const char *parent_name,
 	int ret;
 
 	div = xzalloc(sizeof(*div));
-	if (!div)
-		return ERR_PTR(-ENOMEM);
 
 	div->parent = parent_name;
 	div->divider.clk.name = name;
diff --git a/drivers/clk/mxs/clk-pll.c b/drivers/clk/mxs/clk-pll.c
index 89fd6b5e3112..1b1c9b35434b 100644
--- a/drivers/clk/mxs/clk-pll.c
+++ b/drivers/clk/mxs/clk-pll.c
@@ -96,8 +96,6 @@ struct clk *mxs_clk_pll(const char *name, const char *parent_name,
 	int ret;
 
 	pll = xzalloc(sizeof(*pll));
-	if (!pll)
-		return ERR_PTR(-ENOMEM);
 
 	pll->parent = parent_name;
 	pll->clk.name = name;
diff --git a/drivers/clk/mxs/clk-ref.c b/drivers/clk/mxs/clk-ref.c
index 7ff5527797df..8d0be05615c9 100644
--- a/drivers/clk/mxs/clk-ref.c
+++ b/drivers/clk/mxs/clk-ref.c
@@ -144,8 +144,6 @@ struct clk *mxs_clk_ref(const char *name, const char *parent_name,
 	int ret;
 
 	ref = xzalloc(sizeof(*ref));
-	if (!ref)
-		return ERR_PTR(-ENOMEM);
 
 	ref->parent = parent_name;
 	ref->clk.name = name;
diff --git a/drivers/gpio/gpio-clps711x.c b/drivers/gpio/gpio-clps711x.c
index 769e6ca4f719..c1ec6ab68554 100644
--- a/drivers/gpio/gpio-clps711x.c
+++ b/drivers/gpio/gpio-clps711x.c
@@ -47,8 +47,6 @@ static int clps711x_gpio_probe(struct device_d *dev)
 	}
 
 	bgc = xzalloc(sizeof(struct bgpio_chip));
-	if (!bgc)
-		return -ENOMEM;
 
 	err = bgpio_init(bgc, dev, 1, dat, NULL, NULL, dir, dir_inv, 0);
 	if (err)
diff --git a/drivers/gpio/gpio-generic.c b/drivers/gpio/gpio-generic.c
index c6202fc6512a..608361185aba 100644
--- a/drivers/gpio/gpio-generic.c
+++ b/drivers/gpio/gpio-generic.c
@@ -373,8 +373,6 @@ static int bgpio_dev_probe(struct device_d *dev)
 	dev_get_drvdata(dev, (const void **)&flags);
 
 	bgc = xzalloc(sizeof(struct bgpio_chip));
-	if (!bgc)
-		return -ENOMEM;
 
 	err = bgpio_init(bgc, dev, sz, dat, set, clr, dirout, dirin, flags);
 	if (err)
diff --git a/drivers/gpio/gpio-vf610.c b/drivers/gpio/gpio-vf610.c
index 7c8d1e4c9884..2aff62be5970 100644
--- a/drivers/gpio/gpio-vf610.c
+++ b/drivers/gpio/gpio-vf610.c
@@ -106,8 +106,6 @@ static int vf610_gpio_probe(struct device_d *dev)
 	const __be32 *gpio_ranges;
 
 	port = xzalloc(sizeof(*port));
-	if (!port)
-		return -ENOMEM;
 
 	gpio_ranges = of_get_property(dev->device_node, "gpio-ranges", &size);
 	if (!gpio_ranges) {
diff --git a/drivers/mtd/nand/atmel_nand.c b/drivers/mtd/nand/atmel_nand.c
index 299cc15c3d16..0b9071c9bce7 100644
--- a/drivers/mtd/nand/atmel_nand.c
+++ b/drivers/mtd/nand/atmel_nand.c
@@ -898,8 +898,6 @@ static int __init atmel_pmecc_nand_init_params(struct device_d *dev,
 		/* Set pmecc_rom_base as the begin of gf table */
 		int size = sector_size == 512 ? 0x2000 : 0x4000;
 		pmecc_galois_table = xzalloc(2 * size * sizeof(uint16_t));
-		if (!pmecc_galois_table)
-			return -ENOMEM;
 		host->pmecc_rom_base = pmecc_galois_table;
 		ret = pmecc_build_galois_table((sector_size == 512) ?
 						PMECC_GF_DIMENSION_13 :
diff --git a/drivers/net/gianfar.c b/drivers/net/gianfar.c
index ac698332cf1b..9b2f781d9cb5 100644
--- a/drivers/net/gianfar.c
+++ b/drivers/net/gianfar.c
@@ -483,9 +483,6 @@ static int gfar_probe(struct device_d *dev)
 
 	priv = xzalloc(sizeof(struct gfar_private));
 
-	if (NULL == priv)
-		return -ENODEV;
-
 	edev = &priv->edev;
 
 	priv->mdiobus_tbi = gfar_info->mdiobus_tbi;
diff --git a/drivers/of/base.c b/drivers/of/base.c
index ea330d131012..b5555d5fe63d 100644
--- a/drivers/of/base.c
+++ b/drivers/of/base.c
@@ -194,8 +194,6 @@ void of_alias_scan(void)
 
 		/* Allocate an alias_prop with enough space for the stem */
 		ap = xzalloc(sizeof(*ap) + len + 1);
-		if (!ap)
-			continue;
 		ap->alias = start;
 		of_alias_add(ap, np, id, start, len);
 	}
diff --git a/drivers/pci/pci-imx6.c b/drivers/pci/pci-imx6.c
index affc705d0aba..fc56a0d14ade 100644
--- a/drivers/pci/pci-imx6.c
+++ b/drivers/pci/pci-imx6.c
@@ -580,8 +580,6 @@ static int __init imx6_pcie_probe(struct device_d *dev)
 	int ret;
 
 	imx6_pcie = xzalloc(sizeof(*imx6_pcie));
-	if (!imx6_pcie)
-		return -ENOMEM;
 
 	pp = &imx6_pcie->pp;
 	pp->dev = dev;
diff --git a/drivers/pinctrl/pinctrl-rockchip.c b/drivers/pinctrl/pinctrl-rockchip.c
index 1130f3d845ea..58f2c4af2686 100644
--- a/drivers/pinctrl/pinctrl-rockchip.c
+++ b/drivers/pinctrl/pinctrl-rockchip.c
@@ -412,8 +412,6 @@ static int rockchip_pinctrl_probe(struct device_d *dev)
 	int ret;
 
 	info = xzalloc(sizeof(struct rockchip_pinctrl));
-	if (!info)
-		return -ENOMEM;
 
 	ctrl = rockchip_pinctrl_get_soc_data(info, dev);
 	if (!ctrl) {
diff --git a/drivers/usb/gadget/pxa27x_udc.c b/drivers/usb/gadget/pxa27x_udc.c
index 372c07b41866..4e6b858868c8 100644
--- a/drivers/usb/gadget/pxa27x_udc.c
+++ b/drivers/usb/gadget/pxa27x_udc.c
@@ -218,8 +218,6 @@ static struct usb_request *pxa_ep_alloc_request(struct usb_ep *_ep)
 	struct pxa27x_request *req;
 
 	req = xzalloc(sizeof *req);
-	if (!req)
-		return NULL;
 
 	INIT_LIST_HEAD(&req->queue);
 	req->in_use = 0;
diff --git a/drivers/usb/musb/musb_host.c b/drivers/usb/musb/musb_host.c
index 32a8f0652931..68d819af2cc8 100644
--- a/drivers/usb/musb/musb_host.c
+++ b/drivers/usb/musb/musb_host.c
@@ -1717,8 +1717,6 @@ int musb_host_alloc(struct musb *musb)
 {
 	/* usbcore sets dev->driver_data to hcd, and sometimes uses that... */
 	musb->hcd = xzalloc(sizeof(struct usb_hcd));
-	if (!musb->hcd)
-		return -EINVAL;
 
 	musb->hcd->hcd_priv = musb;
 
diff --git a/drivers/usb/musb/phy-am335x-control.c b/drivers/usb/musb/phy-am335x-control.c
index 5fd8802b3a75..55a2ed27b7d3 100644
--- a/drivers/usb/musb/phy-am335x-control.c
+++ b/drivers/usb/musb/phy-am335x-control.c
@@ -140,10 +140,6 @@ static int am335x_control_usb_probe(struct device_d *dev)
 		return ret;
 
 	ctrl_usb = xzalloc(sizeof(*ctrl_usb));
-	if (!ctrl_usb) {
-		dev_err(dev, "unable to alloc memory for control usb\n");
-		return -ENOMEM;
-	}
 
 	ctrl_usb->dev = dev;
 
diff --git a/drivers/usb/musb/phy-am335x.c b/drivers/usb/musb/phy-am335x.c
index 204e51054dce..ec8c0f538b62 100644
--- a/drivers/usb/musb/phy-am335x.c
+++ b/drivers/usb/musb/phy-am335x.c
@@ -34,8 +34,6 @@ static int am335x_phy_probe(struct device_d *dev)
 	int ret;
 
 	am_usbphy = xzalloc(sizeof(*am_usbphy));
-	if (!am_usbphy)
-		return -ENOMEM;
 
 	iores = dev_request_mem_resource(dev, 0);
 	if (IS_ERR(iores)) {
diff --git a/drivers/video/backlight-pwm.c b/drivers/video/backlight-pwm.c
index 2915dba17405..ec35bd1bc039 100644
--- a/drivers/video/backlight-pwm.c
+++ b/drivers/video/backlight-pwm.c
@@ -147,8 +147,6 @@ static int pwm_backlight_parse_dt(struct device_d *dev,
 		size_t size = sizeof(*pwm_backlight->levels) * length;
 
 		pwm_backlight->levels = xzalloc(size);
-		if (!pwm_backlight->levels)
-			return -ENOMEM;
 
 		ret = of_property_read_u32_array(node, "brightness-levels",
 						 pwm_backlight->levels,
diff --git a/drivers/video/tc358767.c b/drivers/video/tc358767.c
index 2d366ae6627a..f9ca06c62bcb 100644
--- a/drivers/video/tc358767.c
+++ b/drivers/video/tc358767.c
@@ -1352,8 +1352,6 @@ static int tc_probe(struct device_d *dev)
 	int ret;
 
 	tc = xzalloc(sizeof(struct tc_data));
-	if (!tc)
-		return -ENOMEM;
 
 	tc->client = client;
 	tc->dev = dev;
diff --git a/fs/omap4_usbbootfs.c b/fs/omap4_usbbootfs.c
index 6085bca841e9..b35f411cbbc1 100644
--- a/fs/omap4_usbbootfs.c
+++ b/fs/omap4_usbbootfs.c
@@ -73,8 +73,6 @@ static struct file_priv *omap4_usbbootfs_do_open(
 		return ERR_PTR(-ENOSYS);
 
 	priv = xzalloc(sizeof(*priv));
-	if (!priv)
-		return ERR_PTR(-ENOMEM);
 
 	data = OMAP4_USBBOOT_FS_MAGIC	; omap4_usbboot_write(&data, 4);
 	data = OMAP4_USBBOOT_FS_CMD_OPEN; omap4_usbboot_write(&data, 4);
diff --git a/fs/pstore/fs.c b/fs/pstore/fs.c
index 0e05d48ea041..a879a680641c 100644
--- a/fs/pstore/fs.c
+++ b/fs/pstore/fs.c
@@ -64,8 +64,6 @@ int pstore_mkfile(enum pstore_type_id type, char *psname, u64 id, int count,
 	}
 
 	private = xzalloc(sizeof(*private) + size);
-	if (!private)
-		return -ENOMEM;
 	private->type = type;
 	private->id = id;
 	private->count = count;
-- 
2.11.0


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             reply	other threads:[~2017-09-25 10:03 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-09-25 10:02 Uwe Kleine-König [this message]
2017-09-26  6:51 ` Sascha Hauer

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