7.2-stable review patch. If anyone has any objections, please let me know. ------------------ From: Rob Herring (Arm) commit f5376d7e0fb703876199d3b6f9f97e128fa2f8a4 upstream. 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: 5a5e9c0228e6 ("accel: Add Arm Ethos-U NPU driver") Cc: stable@vger.kernel.org Reviewed-by: Frank Li Link: https://patch.msgid.link/20260827-ethosu-fixes-v1-4-346f9ea8791c@kernel.org Signed-off-by: Rob Herring (Arm) Signed-off-by: Greg Kroah-Hartman --- drivers/accel/ethosu/ethosu_drv.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) --- a/drivers/accel/ethosu/ethosu_drv.c +++ b/drivers/accel/ethosu/ethosu_drv.c @@ -274,8 +274,6 @@ static int ethosu_device_suspend(struct 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; @@ -286,6 +284,7 @@ static int ethosu_sram_init(struct ethos ethosudev->npu_info.sram_size, ðosudev->sramphys); if (!ethosudev->sram) { + ethosudev->npu_info.sram_size = 0; dev_err(ethosudev->base.dev, "failed to allocate from SRAM pool\n"); return -ENOMEM; }