Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933208AbcKILFu (ORCPT ); Wed, 9 Nov 2016 06:05:50 -0500 Received: from mail.linuxfoundation.org ([140.211.169.12]:54050 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933158AbcKILFq (ORCPT ); Wed, 9 Nov 2016 06:05:46 -0500 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Ralf Ramsauer , Geert Uytterhoeven , Pantelis Antoniou , Mark Brown Subject: [PATCH 4.8 006/138] spi: mark device nodes only in case of successful instantiation Date: Wed, 9 Nov 2016 11:44:49 +0100 Message-Id: <20161109102845.089739453@linuxfoundation.org> X-Mailer: git-send-email 2.10.2 In-Reply-To: <20161109102844.808685475@linuxfoundation.org> References: <20161109102844.808685475@linuxfoundation.org> User-Agent: quilt/0.64 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1832 Lines: 56 4.8-stable review patch. If anyone has any objections, please let me know. ------------------ From: Ralf Ramsauer commit e0af98a7e025a7263ae7e50264f6f79ed29642a7 upstream. Instantiated SPI device nodes are marked with OF_POPULATE. This was introduced in bd6c164. On unloading, loaded device nodes will of course be unmarked. The problem are nodes that fail during initialisation: If a node fails, it won't be unloaded and hence not be unmarked. If a SPI driver module is unloaded and reloaded, it will skip nodes that failed before. Skip device nodes that are already populated and mark them only in case of success. Note that the same issue exists for I2C. Fixes: bd6c164 ("spi: Mark instantiated device nodes with OF_POPULATE") Signed-off-by: Ralf Ramsauer Reviewed-by: Geert Uytterhoeven Acked-by: Pantelis Antoniou Signed-off-by: Mark Brown Signed-off-by: Greg Kroah-Hartman --- drivers/spi/spi.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) --- a/drivers/spi/spi.c +++ b/drivers/spi/spi.c @@ -1607,9 +1607,11 @@ static void of_register_spi_devices(stru if (of_node_test_and_set_flag(nc, OF_POPULATED)) continue; spi = of_register_spi_device(master, nc); - if (IS_ERR(spi)) + if (IS_ERR(spi)) { dev_warn(&master->dev, "Failed to create SPI device for %s\n", nc->full_name); + of_node_clear_flag(nc, OF_POPULATED); + } } } #else @@ -3120,6 +3122,7 @@ static int of_spi_notify(struct notifier if (IS_ERR(spi)) { pr_err("%s: failed to create for '%s'\n", __func__, rd->dn->full_name); + of_node_clear_flag(rd->dn, OF_POPULATED); return notifier_from_errno(PTR_ERR(spi)); } break;