From d6dab7dd123ba6a737e69d89c8cca9c6d9b75aa9 Mon Sep 17 00:00:00 2001 From: Jean Delvare Date: Wed, 19 Dec 2012 22:16:59 +0100 Subject: [PATCH] hwmon: Fix PCI device reference leak in quirk Thankfully this only affects systems with one specific south bridge and is most probably harmless unless the hwmon module is heavily cycled. Signed-off-by: Jean Delvare Acked-by: Guenter Roeck --- drivers/hwmon/hwmon.c | 24 +++++++++++++----------- 1 file changed, 13 insertions(+), 11 deletions(-) diff --git a/drivers/hwmon/hwmon.c b/drivers/hwmon/hwmon.c index c3c471ca202f..646314f7c839 100644 --- a/drivers/hwmon/hwmon.c +++ b/drivers/hwmon/hwmon.c @@ -84,19 +84,21 @@ static void __init hwmon_pci_quirks(void) /* Open access to 0x295-0x296 on MSI MS-7031 */ sb = pci_get_device(PCI_VENDOR_ID_ATI, 0x436c, NULL); - if (sb && - (sb->subsystem_vendor == 0x1462 && /* MSI */ - sb->subsystem_device == 0x0031)) { /* MS-7031 */ + if (sb) { + if (sb->subsystem_vendor == 0x1462 && /* MSI */ + sb->subsystem_device == 0x0031) { /* MS-7031 */ + pci_read_config_byte(sb, 0x48, &enable); + pci_read_config_word(sb, 0x64, &base); - pci_read_config_byte(sb, 0x48, &enable); - pci_read_config_word(sb, 0x64, &base); - - if (base == 0 && !(enable & BIT(2))) { - dev_info(&sb->dev, - "Opening wide generic port at 0x295\n"); - pci_write_config_word(sb, 0x64, 0x295); - pci_write_config_byte(sb, 0x48, enable | BIT(2)); + if (base == 0 && !(enable & BIT(2))) { + dev_info(&sb->dev, + "Opening wide generic port at 0x295\n"); + pci_write_config_word(sb, 0x64, 0x295); + pci_write_config_byte(sb, 0x48, + enable | BIT(2)); + } } + pci_dev_put(sb); } #endif }