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accel/ethosu: check MMIO mapping errors in probe

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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: 5a5e9c0228 ("accel: Add Arm Ethos-U NPU driver")
Cc: stable@vger.kernel.org
Signed-off-by: GuoHan Zhao <zhaoguohan@kylinos.cn>
Link: https://patch.msgid.link/20260716065219.931088-1-zhaoguohan@kylinos.cn
Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
This commit is contained in:
GuoHan Zhao 2026-07-16 14:52:19 +08:00 committed by Rob Herring (Arm)
parent 7e33ba3a1d
commit 7ab64476a6
1 changed files with 2 additions and 0 deletions
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2
drivers/accel/ethosu/ethosu_drv.c
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@ -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, &ethosudev->clks);
if (ethosudev->num_clks < 0)