Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752864AbdLXVGh (ORCPT ); Sun, 24 Dec 2017 16:06:37 -0500 Received: from mail-pl0-f65.google.com ([209.85.160.65]:38858 "EHLO mail-pl0-f65.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751963AbdLXVE0 (ORCPT ); Sun, 24 Dec 2017 16:04:26 -0500 X-Google-Smtp-Source: ACJfBoszx0T1r0+N9Dick5pqR+l9MfbvxrptmQWqKIyRio/sf8GpUziOpIfU8d40hGgn+2dyoKQYSw== From: Guenter Roeck To: Wim Van Sebroeck Cc: linux-watchdog@vger.kernel.org, linux-kernel@vger.kernel.org, =?UTF-8?q?Zolt=C3=A1n=20B=C3=B6sz=C3=B6rm=C3=A9nyi?= , Guenter Roeck Subject: [PATCH 04/12] watchdog: sp5100_tco: Use standard error codes Date: Sun, 24 Dec 2017 13:04:09 -0800 Message-Id: <1514149457-20273-5-git-send-email-linux@roeck-us.net> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1514149457-20273-1-git-send-email-linux@roeck-us.net> References: <1514149457-20273-1-git-send-email-linux@roeck-us.net> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2656 Lines: 93 By using standard error codes, we can identify and return more than one error condition. Cc: Zoltán Böszörményi Signed-off-by: Guenter Roeck --- drivers/watchdog/sp5100_tco.c | 19 +++++++++++-------- 1 file changed, 11 insertions(+), 8 deletions(-) diff --git a/drivers/watchdog/sp5100_tco.c b/drivers/watchdog/sp5100_tco.c index 11109ac959e2..0e816f2cdb07 100644 --- a/drivers/watchdog/sp5100_tco.c +++ b/drivers/watchdog/sp5100_tco.c @@ -345,12 +345,13 @@ static u8 sp5100_tco_read_pm_reg32(u8 index) /* * Init & exit routines */ -static unsigned char sp5100_tco_setupdevice(void) +static int sp5100_tco_setupdevice(void) { struct pci_dev *dev = NULL; const char *dev_name = NULL; u32 val; u8 base_addr; + int ret; /* Match the PCI device */ for_each_pci_dev(dev) { @@ -361,7 +362,7 @@ static unsigned char sp5100_tco_setupdevice(void) } if (!sp5100_tco_pci) - return 0; + return -ENODEV; pr_info("PCI Vendor ID: 0x%x, Device ID: 0x%x, Revision ID: 0x%x\n", sp5100_tco_pci->vendor, sp5100_tco_pci->device, @@ -383,7 +384,7 @@ static unsigned char sp5100_tco_setupdevice(void) SP5100_PM_IOPORTS_SIZE, dev_name)) { pr_err("I/O address 0x%04x already in use\n", SP5100_IO_PM_INDEX_REG); - goto exit; + return -EBUSY; } /* @@ -433,6 +434,7 @@ static unsigned char sp5100_tco_setupdevice(void) pr_debug("SBResource_MMIO is disabled(0x%04x)\n", val); pr_notice("failed to find MMIO address, giving up.\n"); + ret = -ENODEV; goto unreg_region; setup_wdt: @@ -441,6 +443,7 @@ static unsigned char sp5100_tco_setupdevice(void) tcobase = ioremap(val, SP5100_WDT_MEM_MAP_SIZE); if (!tcobase) { pr_err("failed to get tcobase address\n"); + ret = -ENOMEM; goto unreg_mem_region; } @@ -470,14 +473,13 @@ static unsigned char sp5100_tco_setupdevice(void) release_region(SP5100_IO_PM_INDEX_REG, SP5100_PM_IOPORTS_SIZE); /* Done */ - return 1; + return 0; unreg_mem_region: release_mem_region(tcobase_phys, SP5100_WDT_MEM_MAP_SIZE); unreg_region: release_region(SP5100_IO_PM_INDEX_REG, SP5100_PM_IOPORTS_SIZE); -exit: - return 0; + return ret; } static int sp5100_tco_init(struct platform_device *dev) @@ -488,8 +490,9 @@ static int sp5100_tco_init(struct platform_device *dev) * Check whether or not the hardware watchdog is there. If found, then * set it up. */ - if (!sp5100_tco_setupdevice()) - return -ENODEV; + ret = sp5100_tco_setupdevice(); + if (ret) + return ret; /* Check to see if last reboot was due to watchdog timeout */ pr_info("Last reboot was %striggered by watchdog.\n", -- 2.7.4