From patchwork Fri Oct 11 12:14:00 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Damien Le Moal X-Patchwork-Id: 13832466 X-Patchwork-Delegate: manivannanece23@gmail.com Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 227642141C6; Fri, 11 Oct 2024 12:14:20 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728648861; cv=none; b=PG4RSl9PeJb5TrT3kRBgMfv8iLeFgN6h+4vqWhxOJwuB4j+t3sQNGRw6IzDlLktdRNnIqRng+pc/2v/QbP+yaEaoBB4Xt6GkH1Dj+K5ZiJNeeuYfwoiTlHzfDh9GExj/DUDKNv2AUTTnTaioRHymk4KcBCjfpTuog4IQg41qdY4= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728648861; c=relaxed/simple; bh=fQ5LGyIBaK46oPYJY75HQ+s1l6zSxG5jS7LECMmdORg=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=jWGgJcx9JBkOM2BpCHM+QW+C8vDVyGna4t/3m6xIOw3alyBK2KiXyAwvKBillw0t57AjTJW1a+NKNUIe6WbQljgdQaWWyclTfKcS6m95HozhufbXalqBL6udmFDiRmCP3Oj2FE1DbsK4ApNrv7nDYR+fDCgMB90vIRv5nxCtZwk= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=G5zgAa5C; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="G5zgAa5C" Received: by smtp.kernel.org (Postfix) with ESMTPSA id C1CA2C4CECD; Fri, 11 Oct 2024 12:14:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1728648860; bh=fQ5LGyIBaK46oPYJY75HQ+s1l6zSxG5jS7LECMmdORg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=G5zgAa5CrOc9lo3nDI25cqkuu2ZncQ5zNPwL3Ia4OAPYD8aBDQCaXzF8Z+juq0ob3 6vx2/sk3kvkJuFXDoNwddtZI9CBZMc0jYHyeYE81T2jv46n7+6P7QvgVrTq7E+Lo90 7p72g/sIniO7yrq9UPdN/4mnebNVn43A5nNJTlDYN3iwsKDnr+ghnUbGky2UadeA9Z ribttT+rSBnsPpN6nFPQvWiRTFW9KGEDV8FD0ikY9SK1iSrNwLVorhEABAdJvMwf+c 0LBZpeMuZaT8ONUBltIXEKiHHxrl/+aQQ0yvfyMBsRl66bPRdvALLSsH3iatnNvMup 06WPKSkIUcG9Q== From: Damien Le Moal To: Manivannan Sadhasivam , Lorenzo Pieralisi , Kishon Vijay Abraham I , Shawn Lin , =?utf-8?q?Krzysztof_Wilczy=C5=84ski?= , Bjorn Helgaas , Heiko Stuebner , linux-pci@vger.kernel.org, Rob Herring , Krzysztof Kozlowski , Conor Dooley , devicetree@vger.kernel.org Cc: linux-rockchip@lists.infradead.org, Rick Wertenbroek , Niklas Cassel Subject: [PATCH v4 04/12] PCI: rockchip-ep: Improve rockchip_pcie_ep_map_addr() Date: Fri, 11 Oct 2024 21:14:00 +0900 Message-ID: <20241011121408.89890-5-dlemoal@kernel.org> X-Mailer: git-send-email 2.46.2 In-Reply-To: <20241011121408.89890-1-dlemoal@kernel.org> References: <20241011121408.89890-1-dlemoal@kernel.org> Precedence: bulk X-Mailing-List: linux-pci@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Add a check to verify that the outbound region to be used for mapping an address is not already in use. Signed-off-by: Damien Le Moal Reviewed-by: Manivannan Sadhasivam --- drivers/pci/controller/pcie-rockchip-ep.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/pci/controller/pcie-rockchip-ep.c b/drivers/pci/controller/pcie-rockchip-ep.c index 89ebdf3e4737..edb84fb1ba39 100644 --- a/drivers/pci/controller/pcie-rockchip-ep.c +++ b/drivers/pci/controller/pcie-rockchip-ep.c @@ -243,6 +243,9 @@ static int rockchip_pcie_ep_map_addr(struct pci_epc *epc, u8 fn, u8 vfn, struct rockchip_pcie *pcie = &ep->rockchip; u32 r = rockchip_ob_region(addr); + if (test_bit(r, &ep->ob_region_map)) + return -EBUSY; + rockchip_pcie_prog_ep_ob_atu(pcie, fn, r, addr, pci_addr, size); set_bit(r, &ep->ob_region_map);