From 7ab64476a610fe65858fdc37c7a30caa13e334ac Mon Sep 17 00:00:00 2001 From: GuoHan Zhao Date: Thu, 16 Jul 2026 14:52:19 +0800 Subject: [PATCH] accel/ethosu: check MMIO mapping errors in probe devm_platform_ioremap_resource() returns an error pointer when the register resource cannot be mapped. ethosu_probe() stores it and continues until initialization dereferences it through MMIO accessors. Return the mapping error before initializing the device. Fixes: 5a5e9c0228e6 ("accel: Add Arm Ethos-U NPU driver") Cc: stable@vger.kernel.org Signed-off-by: GuoHan Zhao Link: https://patch.msgid.link/20260716065219.931088-1-zhaoguohan@kylinos.cn Signed-off-by: Rob Herring (Arm) --- drivers/accel/ethosu/ethosu_drv.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/accel/ethosu/ethosu_drv.c b/drivers/accel/ethosu/ethosu_drv.c index ed9c748a54ad..b2901eb8a7a0 100644 --- a/drivers/accel/ethosu/ethosu_drv.c +++ b/drivers/accel/ethosu/ethosu_drv.c @@ -342,6 +342,8 @@ static int ethosu_probe(struct platform_device *pdev) dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(40)); ethosudev->regs = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(ethosudev->regs)) + return PTR_ERR(ethosudev->regs); ethosudev->num_clks = devm_clk_bulk_get_all(&pdev->dev, ðosudev->clks); if (ethosudev->num_clks < 0)