[{"id":3679373,"web_url":"http://patchwork.ozlabs.org/comment/3679373/","msgid":"","list_archive_url":null,"date":"2026-04-20T12:53:56","subject":"Re: [PATCH] arm: layerscape: Check zero size memory bank before\n lmb_add","submitter":{"id":80723,"url":"http://patchwork.ozlabs.org/api/people/80723/","name":"Peng Fan","email":"peng.fan@oss.nxp.com"},"content":"On Thu, Apr 16, 2026 at 09:48:38PM +0800, Ye Li wrote:\n>In layerspace's lmb_arch_add_memory implementation, all memory bank\n>are added to lmb, even some is with zero size. This will cause lmb\n>treating it as overlap with available memory by lmb_addrs_overlap\n>and merge with available memory. Finally causing available memory\n>start address changed to 0.\n>\n>For example, on LX2160, before zero memory bank added to lmb, there\n>are two available memory regions:\n> - region 0, start 0x80000000, size 0x7be00000\n> - region 1, start 0x2080000000, size 0x700000000\n>After zero size memory bank added, merge to one region:\n> - region 0, start 0, size 0x2780000000\n>This wrong new region causes efi_memory_init issue when allocating bounce\n>buffer because of conflict address (with uboot reserved) is allocated.\n>\n>Signed-off-by: Ye Li \n\nReviewed-by: Peng Fan ","headers":{"Return-Path":"","X-Original-To":"incoming@patchwork.ozlabs.org","Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=NXP1.onmicrosoft.com header.i=@NXP1.onmicrosoft.com\n header.a=rsa-sha256 header.s=selector1-NXP1-onmicrosoft-com\n header.b=RPZHAWkS;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=lists.denx.de\n (client-ip=2a01:238:438b:c500:173d:9f52:ddab:ee01; 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