From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id F38A4CD343F for ; Sat, 9 May 2026 07:07:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:Date:Subject:Cc:To:From:Message-ID:Reply-To:Content-Type: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References:List-Owner; bh=lK7ohFdEAMIwgPt7gLEpD5YoicRl00ld7oZBGaVtP6I=; b=IAaMEM9O5v4HhRctrEdBkA5Gso 0PAkriTzqiIuM60xyfDevtxmPmF01LOLY4doqVOtaP68fkmbeaxw2uXLn/BKtwhivDvlTAtt3INCD LD/uZ+5QzsqUNR0YGCZqNE3+JGP80aanupIDDmyiRIDdhtUD2TFSAUfNpQiO80+y6TN1wkMZkg/50 dQdeQlSHqy9FmwbugtbIFyLO+8k3SnjQ4INGvHzXkQ4+8FSoQgEh793kuy2cZj1X7wZmz4slrOmPK CbUyNx3X3FL1hACzdsl5M62SOgOA3eiYtjH6oH8Z8sf81WYgyJI8wx0AD47+X9vFf8NDZy7UIAIsn kmaLQUbA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1wLbmt-00000008Rpk-0nU2; Sat, 09 May 2026 07:07:47 +0000 Received: from out203-205-221-155.mail.qq.com ([203.205.221.155]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1wLbmp-00000008Rp1-3qIN for linux-arm-kernel@lists.infradead.org; Sat, 09 May 2026 07:07:45 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=foxmail.com; s=s201512; t=1778310459; bh=lK7ohFdEAMIwgPt7gLEpD5YoicRl00ld7oZBGaVtP6I=; h=From:To:Cc:Subject:Date; b=smQtIsGYPSJ+gEP+tBxu2dNCZzxgSw7VYylxBUaKGh22HxwnCCiSV/5jgyeWtfa7w yCmVxCLjR5vm4MAlrvHxGt9DWt8J5EqBspawUJ/vd/K7tDs+dPQctp8+0Ajr5hc6oY FYxyWUbh7Xt5p6ctJmy6Ln7kMg6woVuERvBzM194= Received: from LAPTOP-LEO.yizhu.local ([61.169.175.90]) by newxmesmtplogicsvrszc43-0.qq.com (NewEsmtp) with SMTP id 1E528A4D; Sat, 09 May 2026 15:07:37 +0800 X-QQ-mid: xmsmtpt1778310457togr8xore Message-ID: X-QQ-XMAILINFO: MJf32pulH481fEIAojPZ1aL2Obd/WH1jnkB3OnJ8p9BS4LEZKHvj8ckfFRQGTE DhUpEQqnkOUC1uqR/falbX4f12fellpoyAFtAudqK/AVzyDUccZFeBhO20qtvsrDYaX7F4dyaSv4 CN5bdC9rykHSjjAAR4/pqW2B0BC//wGHg+cg+Z3hEsvDR2ZPX3aUNcJ/00EsLgSRc1Y5ub4wWCY+ 2pbiV/GDNOEPOBFrGLXr3wNhA7ZT+6gmbyOqjfgXExHxAmp1QPAk5Gyc9TLauLvL3/NfctzgKwBF D71PNegdAZamz9cmaHhxt44iY/P09fjZ36k5Tc02ERxWyurBdKhRDgiHrhuyVY06amtAZ+C1r/Pa p0XUN5AcT8LwoYApg5TR2lEdgMGBUJk9JvqL7UOMLGxP0C08ECLVEGqgy7mZ/F3NQ/puITug38tz y/6uEOmWb+/JxY8tpZvHs12GUatTrbH/hZiSA1KXZQRCRr7Vmu0V16oqz+IVBz+WOedcN+EK5tml 9VcK1KUoMtTTL0Bn9IzFibHAoD9uygtY4yyp52LwhQddqAOt828s5tz26QfYpgMzN4kLR7MWzBhX yL4h/dCCjtw9dmakxbVmPUKzuBJmcminocNzROhKxOBNzx1AOnPC27fAJoV69fcsrD+7UVKp9j8D v4qyFV5yRaGZ3XyCdRYWrrlIcV2FxpfVxZ7RUYWsQNFUCm876tq5zJ9mfdAJhCJc/W4/J9DpC7zd KW8atni+Zrusy19Blq5QNbEn0xvSPcpJoxq6YSkMpMcBoHCWhMUYEIJ97AJe6afy+OtQbaPbqVVu XPplw85WGw8kHnukoSSdpQ3JGIkoukhe94my9wXZMcekmb+nD2gjBZZ9NeNC8jl76fprR7S5wJy+ 5wnVOXmLm9yvn6RPA3PWJA/3t2xA31ZpCQjoXWWSfL5hpNvPEhat82awO+bixvQq6H5H0ikyOK05 kcBIgo/igBSu4aR6Wniewd8u+OxGaWZgM60OJY9vU9IWLLuc5i4VFQcWZEmm8xeMC3myYi0kP9KL IjyqJW9ay3yWZGtlkuSPPCvqHEoyY9PBQ7O6E+S9SeN+S8P3eV8+/w6C3+1wZb5rZFXFZHXm53an 3PLwNA8oac2yQDOdk4xytsvaAfXw== X-QQ-XMRINFO: NI4Ajvh11aEjEMj13RCX7UuhPEoou2bs1g== From: Leo Jiang To: Will Deacon Cc: Robin Murphy , Pranjal Shrivastava , Joerg Roedel , iommu@lists.linux.dev, linux-arm-kernel@lists.infradead.org, Leo Jiang Subject: [PATCH v2] iommu/arm-smmu-v3: Limit queue allocation retry boundary to PAGE_SIZE Date: Sat, 9 May 2026 15:07:33 +0800 X-OQ-MSGID: <20260509070733.950260-1-leo.jiang1224@foxmail.com> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260509_000744_272227_A68831DC X-CRM114-Status: UNSURE ( 9.26 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Stop retrying queue allocation when qsz reaches PAGE_SIZE. Signed-off-by: Leo Jiang --- Changes in v2: - Use real name "Leo Jiang". - Remove code comments as suggested by Will. - Limit the queue allocation retry boundary to PAGE_SIZE, per the feedback from the maintainer. - Link to v1: https://lore.kernel.org/linux-iommu/tencent_F6E384A40D990A279B460A0CDE1927FDF509@qq.com --- drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c index e8d7dbe495f0..4a0b15b1d4d2 100644 --- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c +++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c @@ -4418,7 +4418,7 @@ int arm_smmu_init_one_queue(struct arm_smmu_device *smmu, qsz = ((1 << q->llq.max_n_shift) * dwords) << 3; q->base = dmam_alloc_coherent(smmu->dev, qsz, &q->base_dma, GFP_KERNEL); - if (q->base || qsz < PAGE_SIZE) + if (q->base || qsz <= PAGE_SIZE) break; q->llq.max_n_shift--; -- 2.34.1