treewide: refresh kmalloc_obj() conversionsgrafted

This is another run of the Coccinelle script for converting kmalloc()
family of allocations to kmalloc_obj() via the existing rules in
scripts/coccinelle/api/kmalloc_objs.cocci

This catches both the set of kmalloc() uses added since the first
kmalloc_obj() conversions in v7.0 and adds a large group missed in the
first pass due to Coccinelle not interacting well with the cleanup.h
scoped_...() family of macros[1]. I worked around this with spatch's
"--macro-file" argument to a file with all the scoped_...() macros mapped
to Coccinelle's YACFE_ITERATOR[2] as that was the closest viable control
flow indicator I could find.

Build tested allmodconfig on x86, arm64, arm, loongarch, mips, powerpc,
riscv, and s390 with no new warnings.

Link: https://lore.kernel.org/lkml/202609021314.8A9C0B8@keescook/ [1]
Link: https://github.com/coccinelle/coccinelle/blob/master/standard.h [2]
Signed-off-by: Kees Cook <kees+treewide@kernel.org>

1 files changed, 141 insertions, 0 deletions

diff --git a/drivers/gpio/gpio-i8255.c b/drivers/gpio/gpio-i8255.c
new file mode 100644
index 000000000..541a34844
--- /dev/null
+++ b/drivers/gpio/gpio-i8255.c
@@ -0,0 +1,141 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Intel 8255 Programmable Peripheral Interface
+ * Copyright (C) 2022 William Breathitt Gray
+ */
+#include <linux/bits.h>
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/export.h>
+#include <linux/gpio/regmap.h>
+#include <linux/module.h>
+#include <linux/regmap.h>
+
+#include "gpio-i8255.h"
+
+#define I8255_NGPIO 24
+#define I8255_NGPIO_PER_REG 8
+#define I8255_CONTROL_PORTC_LOWER_DIRECTION BIT(0)
+#define I8255_CONTROL_PORTB_DIRECTION BIT(1)
+#define I8255_CONTROL_PORTC_UPPER_DIRECTION BIT(3)
+#define I8255_CONTROL_PORTA_DIRECTION BIT(4)
+#define I8255_CONTROL_MODE_SET BIT(7)
+#define I8255_PORTA 0x0
+#define I8255_PORTB 0x1
+#define I8255_PORTC 0x2
+#define I8255_CONTROL 0x3
+#define I8255_REG_DAT_BASE I8255_PORTA
+#define I8255_REG_DIR_IN_BASE I8255_CONTROL
+
+static int i8255_direction_mask(const unsigned int offset)
+{
+	const unsigned int stride = offset / I8255_NGPIO_PER_REG;
+	const unsigned int line = offset % I8255_NGPIO_PER_REG;
+
+	switch (stride) {
+	case I8255_PORTA:
+		return I8255_CONTROL_PORTA_DIRECTION;
+	case I8255_PORTB:
+		return I8255_CONTROL_PORTB_DIRECTION;
+	case I8255_PORTC:
+		/* Port C can be configured by nibble */
+		if (line >= 4)
+			return I8255_CONTROL_PORTC_UPPER_DIRECTION;
+		return I8255_CONTROL_PORTC_LOWER_DIRECTION;
+	default:
+		/* Should never reach this path */
+		return 0;
+	}
+}
+
+static int i8255_ppi_init(struct regmap *const map, const unsigned int base)
+{
+	int err;
+
+	/* Configure all ports to MODE 0 output mode */
+	err = regmap_write(map, base + I8255_CONTROL, I8255_CONTROL_MODE_SET);
+	if (err)
+		return err;
+
+	/* Initialize all GPIO to output 0 */
+	err = regmap_write(map, base + I8255_PORTA, 0x00);
+	if (err)
+		return err;
+	err = regmap_write(map, base + I8255_PORTB, 0x00);
+	if (err)
+		return err;
+	return regmap_write(map, base + I8255_PORTC, 0x00);
+}
+
+static int i8255_reg_mask_xlate(struct gpio_regmap *gpio, enum gpio_regmap_operation op,
+				unsigned int base, unsigned int offset, unsigned int *reg,
+				unsigned int *mask)
+{
+	const unsigned int ppi = offset / I8255_NGPIO;
+	const unsigned int ppi_offset = offset % I8255_NGPIO;
+	const unsigned int stride = ppi_offset / I8255_NGPIO_PER_REG;
+	const unsigned int line = ppi_offset % I8255_NGPIO_PER_REG;
+
+	switch (base) {
+	case I8255_REG_DAT_BASE:
+		*reg = base + stride + ppi * 4;
+		*mask = BIT(line);
+		return 0;
+	case I8255_REG_DIR_IN_BASE:
+		*reg = base + ppi * 4;
+		*mask = i8255_direction_mask(ppi_offset);
+		return 0;
+	default:
+		/* Should never reach this path */
+		return -EINVAL;
+	}
+}
+
+/**
+ * devm_i8255_regmap_register - Register an i8255 GPIO controller
+ * @dev:	device that is registering this i8255 GPIO device
+ * @config:	configuration for i8255_regmap_config
+ *
+ * Registers an Intel 8255 Programmable Peripheral Interface GPIO controller.
+ * Returns 0 on success and negative error number on failure.
+ */
+int devm_i8255_regmap_register(struct device *const dev,
+			       const struct i8255_regmap_config *const config)
+{
+	struct gpio_regmap_config gpio_config = {0};
+	unsigned long i;
+	int err;
+
+	if (!config->parent)
+		return -EINVAL;
+
+	if (!config->map)
+		return -EINVAL;
+
+	if (!config->num_ppi)
+		return -EINVAL;
+
+	for (i = 0; i < config->num_ppi; i++) {
+		err = i8255_ppi_init(config->map, i * 4);
+		if (err)
+			return err;
+	}
+
+	gpio_config.parent = config->parent;
+	gpio_config.regmap = config->map;
+	gpio_config.ngpio = I8255_NGPIO * config->num_ppi;
+	gpio_config.names = config->names;
+	gpio_config.reg_dat_base = GPIO_REGMAP_ADDR(I8255_REG_DAT_BASE);
+	gpio_config.reg_set_base = GPIO_REGMAP_ADDR(I8255_REG_DAT_BASE);
+	gpio_config.reg_dir_in_base = GPIO_REGMAP_ADDR(I8255_REG_DIR_IN_BASE);
+	gpio_config.ngpio_per_reg = I8255_NGPIO_PER_REG;
+	gpio_config.irq_domain = config->domain;
+	gpio_config.reg_mask_xlate = i8255_reg_mask_xlate;
+
+	return PTR_ERR_OR_ZERO(devm_gpio_regmap_register(dev, &gpio_config));
+}
+EXPORT_SYMBOL_NS_GPL(devm_i8255_regmap_register, "I8255");
+
+MODULE_AUTHOR("William Breathitt Gray");
+MODULE_DESCRIPTION("Intel 8255 Programmable Peripheral Interface");
+MODULE_LICENSE("GPL");