From mboxrd@z Thu Jan 1 00:00:00 1970 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 93AE11ED0CC; Sun, 24 Mar 2024 23:07:44 +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=1711321665; cv=none; b=tlN0QtqSd8/KkmeqyHNUYLeCcnkk1eEEK/GjFQpa1u1v18kTg8jMZe12f/GbitIrepxatowwK+aNTIXhQ0L7BnbSVqiklH1JEIbatTHiI8va9ghtwAmkyiU4J+SoKzxOgmkYibfIkI8a+V6gozpdJXxtqBd6DSPvAl+bsG4BphY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1711321665; c=relaxed/simple; bh=ppeDvN+dAlDV8DFEvXcl8obmqcthApyH6YVITn8wH9o=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=pbsJmHrOtltOzEBNgBGod9KNQ9+pjGC41YKRpciqdEdU02saqGTZGvKxxk6B1aH638XXWJlXKFVz1iy4c7PINSd//x4bR3d0OiRYFcDd9wZIIBswDzfVAfkPUFWXrGR5tjyFTXTO5FOLQZL8zj8t0auSpNF14/mbb7x0Kr5b1+c= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=dOuPZQVQ; 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="dOuPZQVQ" Received: by smtp.kernel.org (Postfix) with ESMTPSA id B709CC433B1; Sun, 24 Mar 2024 23:07:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1711321664; bh=ppeDvN+dAlDV8DFEvXcl8obmqcthApyH6YVITn8wH9o=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=dOuPZQVQ32S8aYiA2zb78E2YQm+qwQarIS8RI2tDROvddTcwaWsEu1L5V+aIEbtik 8UNuXz9Cg6s7uF9qbSZ/mHaDCfz+niDB7LturbZ1NZZqrl3yM7Scm7rpKHHYUgNLNu /jKY391IMZuFpROo9Y9C4v1sbch2ndK9qAoFMu10UFMbkUNfW97kXfvzkHCFAaojlh x6c9rBWVd11E31WBoerkv4kDuyAFOo7/WxvYYrVoxSOp/jemwTKc9KLk2Vg8NznQVj wpwzCs5YmvCAanHIr7RcG1na1CQJ/ZlTiOnN44jF/GangTtXMDh6T8D29e0FmdPbt2 e1wZ6/oJ4ByyQ== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Christophe JAILLET , Bjorn Helgaas , Logan Gunthorpe , Sasha Levin Subject: [PATCH 6.6 394/638] PCI/P2PDMA: Fix a sleeping issue in a RCU read section Date: Sun, 24 Mar 2024 18:57:11 -0400 Message-ID: <20240324230116.1348576-395-sashal@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240324230116.1348576-1-sashal@kernel.org> References: <20240324230116.1348576-1-sashal@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit From: Christophe JAILLET [ Upstream commit 1e5c66afd4a40bb7be17cb33cbb1a1085f727730 ] It is not allowed to sleep within a RCU read section, so use GFP_ATOMIC instead of GFP_KERNEL here. Link: https://lore.kernel.org/r/02d9ec4a10235def0e764ff1f5be881ba12e16e8.1704397858.git.christophe.jaillet@wanadoo.fr Fixes: ae21f835a5bd ("PCI/P2PDMA: Finish RCU conversion of pdev->p2pdma") Signed-off-by: Christophe JAILLET Signed-off-by: Bjorn Helgaas Reviewed-by: Logan Gunthorpe Signed-off-by: Sasha Levin --- drivers/pci/p2pdma.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/pci/p2pdma.c b/drivers/pci/p2pdma.c index fa7370f9561ac..b8becc7257cda 100644 --- a/drivers/pci/p2pdma.c +++ b/drivers/pci/p2pdma.c @@ -661,7 +661,7 @@ calc_map_type_and_dist(struct pci_dev *provider, struct pci_dev *client, p2pdma = rcu_dereference(provider->p2pdma); if (p2pdma) xa_store(&p2pdma->map_types, map_types_idx(client), - xa_mk_value(map_type), GFP_KERNEL); + xa_mk_value(map_type), GFP_ATOMIC); rcu_read_unlock(); return map_type; } -- 2.43.0