On Mon, Sep 20, 2021 at 11:52:15AM +0200, Horatiu Vultur wrote:
> diff --git a/drivers/net/ethernet/microchip/lan966x/lan966x_main.c b/drivers/net/ethernet/microchip/lan966x/lan966x_main.c
> new file mode 100644
> index 000000000000..2984f510ae27
> --- /dev/null
> +++ b/drivers/net/ethernet/microchip/lan966x/lan966x_main.c
> @@ -0,0 +1,350 @@
> +// SPDX-License-Identifier: GPL-2.0+
> +
> +#include <asm/memory.h>
> +#include <linux/module.h>
> +#include <linux/if_bridge.h>
> +#include <linux/iopoll.h>
> +#include <linux/of_platform.h>
> +#include <linux/of_net.h>
> +#include <linux/reset.h>
> +
> +#include "lan966x_main.h"
> +
> +#define READL_SLEEP_US 10
> +#define READL_TIMEOUT_US 100000000
> +
> +#define IO_RANGES 2
> +
> +static const struct of_device_id lan966x_match[] = {
> + { .compatible = "microchip,lan966x-switch" },
> + { }
> +};
> +MODULE_DEVICE_TABLE(of, mchp_lan966x_match);
> +
> +struct lan966x_main_io_resource {
> + enum lan966x_target id;
> + phys_addr_t offset;
> + int range;
> +};
> +
> +static const struct lan966x_main_io_resource lan966x_main_iomap[] = {
> + { TARGET_CPU, 0xc0000, 0 }, /* 0xe00c0000 */
> + { TARGET_ORG, 0, 1 }, /* 0xe2000000 */
> + { TARGET_GCB, 0x4000, 1 }, /* 0xe2004000 */
> + { TARGET_QS, 0x8000, 1 }, /* 0xe2008000 */
> + { TARGET_CHIP_TOP, 0x10000, 1 }, /* 0xe2010000 */
> + { TARGET_REW, 0x14000, 1 }, /* 0xe2014000 */
> + { TARGET_SYS, 0x28000, 1 }, /* 0xe2028000 */
> + { TARGET_HSIO, 0x2c000, 1 }, /* 0xe202c000 */
> + { TARGET_DEV, 0x34000, 1 }, /* 0xe2034000 */
> + { TARGET_DEV + 1, 0x38000, 1 }, /* 0xe2038000 */
> + { TARGET_DEV + 2, 0x3c000, 1 }, /* 0xe203c000 */
> + { TARGET_DEV + 3, 0x40000, 1 }, /* 0xe2040000 */
> + { TARGET_DEV + 4, 0x44000, 1 }, /* 0xe2044000 */
> + { TARGET_DEV + 5, 0x48000, 1 }, /* 0xe2048000 */
> + { TARGET_DEV + 6, 0x4c000, 1 }, /* 0xe204c000 */
> + { TARGET_DEV + 7, 0x50000, 1 }, /* 0xe2050000 */
> + { TARGET_QSYS, 0x100000, 1 }, /* 0xe2100000 */
> + { TARGET_AFI, 0x120000, 1 }, /* 0xe2120000 */
> + { TARGET_ANA, 0x140000, 1 }, /* 0xe2140000 */
> +};
> +
> +static int lan966x_create_targets(struct platform_device *pdev,
> + struct lan966x *lan966x)
> +{
> + struct resource *iores[IO_RANGES];
> + void __iomem *iomem[IO_RANGES];
> + void __iomem *begin[IO_RANGES];
> + int idx;
> +
> + for (idx = 0; idx < IO_RANGES; idx++) {
> + iores[idx] = platform_get_resource(pdev, IORESOURCE_MEM,
> + idx);
> + iomem[idx] = devm_ioremap(&pdev->dev,
> + iores[idx]->start,
> + resource_size(iores[idx]));
This is buggy. If platform_get_resource() returns NULL, you will oops
the kernel.
In any case, this code will be ripe for janitor patching. Please
consider using devm_platform_ioremap_resource() now, before someone
converts your code to use this function.
--
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
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