From: Rob Herring (Arm) Date: Mon, 5 Jan 2026 21:06:43 +0000 (-0600) Subject: mtd: rawnand: atmel: Defer probe if SRAM is missing X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5f68fb7ead5c39d03bab98d5bcb1ddba9ca51b2d;p=thirdparty%2Fkernel%2Flinux.git mtd: rawnand: atmel: Defer probe if SRAM is missing The Atmel NAND controller driver depends on an SRAM pool and has an implicit assumption that the SRAM pool has already been created. Changing the initcall ordering can break this. Unfortunately, fw_devlink can't save us here as there's not a standard property to track the dependency. So it's up to deferring probe to save us. Acked-by: Alexandre Belloni Tested-by: Alexandre Belloni Signed-off-by: Rob Herring (Arm) Signed-off-by: Miquel Raynal --- diff --git a/drivers/mtd/nand/raw/atmel/nand-controller.c b/drivers/mtd/nand/raw/atmel/nand-controller.c index 83ba4ebd02d41..e7fdf532c5fef 100644 --- a/drivers/mtd/nand/raw/atmel/nand-controller.c +++ b/drivers/mtd/nand/raw/atmel/nand-controller.c @@ -2304,10 +2304,8 @@ atmel_hsmc_nand_controller_init(struct atmel_hsmc_nand_controller *nc) nc->sram.pool = of_gen_pool_get(nc->base.dev->of_node, "atmel,nfc-sram", 0); - if (!nc->sram.pool) { - dev_err(nc->base.dev, "Missing SRAM\n"); - return -ENOMEM; - } + if (!nc->sram.pool) + return dev_err_probe(nc->base.dev, -EPROBE_DEFER, "Missing SRAM\n"); nc->sram.virt = (void __iomem *)gen_pool_dma_alloc(nc->sram.pool, ATMEL_NFC_SRAM_SIZE,