From 3a2c4d55e32ad65efebdb6de44eef3bfa08bb49d Mon Sep 17 00:00:00 2001
From: Kees Cook <kees+treewide@kernel.org>
Date: Wed, 2 Sep 2026 15:31:14 -0700
Subject: treewide: refresh kmalloc_obj() conversions

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>
---
 drivers/gpio/gpio-max7301.c | 104 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 104 insertions(+)
 create mode 100644 drivers/gpio/gpio-max7301.c

(limited to 'drivers/gpio/gpio-max7301.c')

diff --git a/drivers/gpio/gpio-max7301.c b/drivers/gpio/gpio-max7301.c
new file mode 100644
index 000000000..11813f41d
--- /dev/null
+++ b/drivers/gpio/gpio-max7301.c
@@ -0,0 +1,104 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2006 Juergen Beisert, Pengutronix
+ * Copyright (C) 2008 Guennadi Liakhovetski, Pengutronix
+ * Copyright (C) 2009 Wolfram Sang, Pengutronix
+ *
+ * Check max730x.c for further details.
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/mutex.h>
+#include <linux/slab.h>
+#include <linux/spi/spi.h>
+#include <linux/spi/max7301.h>
+
+/* A write to the MAX7301 means one message with one transfer */
+static int max7301_spi_write(struct device *dev, unsigned int reg,
+				unsigned int val)
+{
+	struct spi_device *spi = to_spi_device(dev);
+	u16 word = ((reg & 0x7F) << 8) | (val & 0xFF);
+
+	return spi_write_then_read(spi, &word, sizeof(word), NULL, 0);
+}
+
+/* A read from the MAX7301 means two transfers; here, one message each */
+
+static int max7301_spi_read(struct device *dev, unsigned int reg)
+{
+	int ret;
+	u16 word;
+	struct spi_device *spi = to_spi_device(dev);
+
+	word = 0x8000 | (reg << 8);
+	ret = spi_write_then_read(spi, &word, sizeof(word), &word,
+				  sizeof(word));
+	if (ret)
+		return ret;
+	return word & 0xff;
+}
+
+static int max7301_probe(struct spi_device *spi)
+{
+	struct max7301 *ts;
+	int ret;
+
+	/* bits_per_word cannot be configured in platform data */
+	spi->bits_per_word = 16;
+	ret = spi_setup(spi);
+	if (ret < 0)
+		return ret;
+
+	ts = devm_kzalloc(&spi->dev, sizeof(struct max7301), GFP_KERNEL);
+	if (!ts)
+		return -ENOMEM;
+
+	ts->read = max7301_spi_read;
+	ts->write = max7301_spi_write;
+	ts->dev = &spi->dev;
+
+	ret = __max730x_probe(ts);
+	return ret;
+}
+
+static void max7301_remove(struct spi_device *spi)
+{
+	__max730x_remove(&spi->dev);
+}
+
+static const struct spi_device_id max7301_id[] = {
+	{ "max7301", 0 },
+	{ }
+};
+MODULE_DEVICE_TABLE(spi, max7301_id);
+
+static struct spi_driver max7301_driver = {
+	.driver = {
+		.name = "max7301",
+	},
+	.probe = max7301_probe,
+	.remove = max7301_remove,
+	.id_table = max7301_id,
+};
+
+static int __init max7301_init(void)
+{
+	return spi_register_driver(&max7301_driver);
+}
+/* register after spi postcore initcall and before
+ * subsys initcalls that may rely on these GPIOs
+ */
+subsys_initcall(max7301_init);
+
+static void __exit max7301_exit(void)
+{
+	spi_unregister_driver(&max7301_driver);
+}
+module_exit(max7301_exit);
+
+MODULE_AUTHOR("Juergen Beisert, Wolfram Sang");
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("MAX7301 GPIO-Expander");
-- 
cgit v1.3.1