From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932087Ab3BGAAz (ORCPT ); Wed, 6 Feb 2013 19:00:55 -0500 Received: from mail.ispras.ru ([83.149.199.43]:39858 "EHLO mail.ispras.ru" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757988Ab3BGAAv (ORCPT ); Wed, 6 Feb 2013 19:00:51 -0500 From: Alexey Khoroshilov To: Greg Kroah-Hartman Cc: Alexey Khoroshilov , Jiri Slaby , linux-kernel@vger.kernel.org, ldv-project@linuxtesting.org Subject: [PATCH 1/2] pcmcia: synclink_cs: fix error handling in mgslpc_probe() Date: Thu, 7 Feb 2013 01:00:34 +0100 Message-Id: <1360195235-28949-1-git-send-email-khoroshilov@ispras.ru> X-Mailer: git-send-email 1.7.9.5 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org mgslpc_probe() ignores errors in mgslpc_add_device() and does not release all resource if mgslpc_config() failed. The patch adds returned code to mgslpc_add_device() and fixes the both issues. Found by Linux Driver Verification project (linuxtesting.org). Signed-off-by: Alexey Khoroshilov --- drivers/char/pcmcia/synclink_cs.c | 51 +++++++++++++++++++++++++++++-------- 1 file changed, 41 insertions(+), 10 deletions(-) diff --git a/drivers/char/pcmcia/synclink_cs.c b/drivers/char/pcmcia/synclink_cs.c index b66eaa0..56e4e94 100644 --- a/drivers/char/pcmcia/synclink_cs.c +++ b/drivers/char/pcmcia/synclink_cs.c @@ -397,7 +397,7 @@ static int adapter_test(MGSLPC_INFO *info); static int claim_resources(MGSLPC_INFO *info); static void release_resources(MGSLPC_INFO *info); -static void mgslpc_add_device(MGSLPC_INFO *info); +static int mgslpc_add_device(MGSLPC_INFO *info); static void mgslpc_remove_device(MGSLPC_INFO *info); static bool rx_get_frame(MGSLPC_INFO *info, struct tty_struct *tty); @@ -549,14 +549,21 @@ static int mgslpc_probe(struct pcmcia_device *link) /* Initialize the struct pcmcia_device structure */ ret = mgslpc_config(link); - if (ret) { - tty_port_destroy(&info->port); - return ret; - } + if (ret != 0) + goto failed; - mgslpc_add_device(info); + ret = mgslpc_add_device(info); + if (ret != 0) + goto failed_release; return 0; + +failed_release: + mgslpc_release((u_long)link); +failed: + tty_port_destroy(&info->port); + kfree(info); + return ret; } /* Card has been inserted. @@ -2706,8 +2713,12 @@ static void release_resources(MGSLPC_INFO *info) * * Arguments: info pointer to device instance data */ -static void mgslpc_add_device(MGSLPC_INFO *info) +static int mgslpc_add_device(MGSLPC_INFO *info) { + MGSLPC_INFO *current_dev = NULL; + struct device *tty_dev; + int ret; + info->next_device = NULL; info->line = mgslpc_device_count; sprintf(info->device_name,"ttySLP%d",info->line); @@ -2722,7 +2733,7 @@ static void mgslpc_add_device(MGSLPC_INFO *info) if (!mgslpc_device_list) mgslpc_device_list = info; else { - MGSLPC_INFO *current_dev = mgslpc_device_list; + current_dev = mgslpc_device_list; while( current_dev->next_device ) current_dev = current_dev->next_device; current_dev->next_device = info; @@ -2737,10 +2748,30 @@ static void mgslpc_add_device(MGSLPC_INFO *info) info->device_name, info->io_base, info->irq_level); #if SYNCLINK_GENERIC_HDLC - hdlcdev_init(info); + ret = hdlcdev_init(info); + if (ret != 0) + goto failed; #endif - tty_port_register_device(&info->port, serial_driver, info->line, + + tty_dev = tty_port_register_device(&info->port, serial_driver, info->line, &info->p_dev->dev); + if (IS_ERR(tty_dev)) { + ret = PTR_ERR(tty_dev); +#if SYNCLINK_GENERIC_HDLC + hdlcdev_exit(info); +#endif + goto failed; + } + + return 0; + +failed: + if (current_dev) + current_dev->next_device = NULL; + else + mgslpc_device_list = NULL; + mgslpc_device_count--; + return ret; } static void mgslpc_remove_device(MGSLPC_INFO *remove_info) -- 1.7.9.5