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accel: ethosu: Ensure SRAM size is 0 on mapping failure

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On a mapping failure of the SRAM, the SRAM size is left as non-zero. The
probe will succeed as the error return is not checked since having SRAM is
not a hard requirement. The non-zero size allows jobs to access SRAM which
is left pointing to physical base address 0x0.

Fixes: 5a5e9c0228 ("accel: Add Arm Ethos-U NPU driver")
Cc: stable@vger.kernel.org
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Link: https://patch.msgid.link/20260827-ethosu-fixes-v1-4-346f9ea8791c@kernel.org
Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
This commit is contained in:
Rob Herring (Arm) 2026-08-27 15:33:03 -05:00
parent eb3a41fd35
commit f5376d7e0f
1 changed files with 1 additions and 2 deletions
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3
drivers/accel/ethosu/ethosu_drv.c
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@ -281,8 +281,6 @@ static int ethosu_device_suspend(struct device *dev)
static int ethosu_sram_init(struct ethosu_device *ethosudev)
{
ethosudev->npu_info.sram_size = 0;
ethosudev->srampool = of_gen_pool_get(ethosudev->base.dev->of_node, "sram", 0);
if (!ethosudev->srampool)
return 0;
@ -293,6 +291,7 @@ static int ethosu_sram_init(struct ethosu_device *ethosudev)
ethosudev->npu_info.sram_size,
&ethosudev->sramphys);
if (!ethosudev->sram) {
ethosudev->npu_info.sram_size = 0;
dev_err(ethosudev->base.dev, "failed to allocate from SRAM pool\n");
return -ENOMEM;
}