diff options
Diffstat (limited to 'target/linux/x86/patches-4.4/097-0004-watchdog-sp5100_tco-properly-check-for-new-register-.patch')
| -rw-r--r-- | target/linux/x86/patches-4.4/097-0004-watchdog-sp5100_tco-properly-check-for-new-register-.patch | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/target/linux/x86/patches-4.4/097-0004-watchdog-sp5100_tco-properly-check-for-new-register-.patch b/target/linux/x86/patches-4.4/097-0004-watchdog-sp5100_tco-properly-check-for-new-register-.patch new file mode 100644 index 0000000000..cb7fe98cba --- /dev/null +++ b/target/linux/x86/patches-4.4/097-0004-watchdog-sp5100_tco-properly-check-for-new-register-.patch @@ -0,0 +1,76 @@ +From 46856fabe40cc80f92134683cdec7dc0fc8f4000 Mon Sep 17 00:00:00 2001 +From: Lucas Stach <dev@lynxeye.de> +Date: Tue, 3 May 2016 19:15:58 +0200 +Subject: [PATCH] watchdog: sp5100_tco: properly check for new register layouts + +Commits 190aa4304de6 (Add AMD Mullins platform support) and +cca118fa2a0a94 (Add AMD Carrizo platform support) enabled the +driver on a lot more devices, but the following commit missed +a single location in the code when checking if the SB800 register +offsets should be used. This leads to the wrong register being +written which in turn causes ACPI to go haywire. + +Fix this by introducing a helper function to check for the new +register layout and use this consistently. + +https://bugzilla.kernel.org/show_bug.cgi?id=114201 +https://bugzilla.redhat.com/show_bug.cgi?id=1329910 +Fixes: bdecfcdb5461 (sp5100_tco: fix the device check for SB800 +and later chipsets) +Cc: stable@vger.kernel.org (4.5+) +Signed-off-by: Lucas Stach <dev@lynxeye.de> +Signed-off-by: Guenter Roeck <linux@roeck-us.net> +Signed-off-by: Wim Van Sebroeck <wim@iguana.be> +--- + drivers/watchdog/sp5100_tco.c | 15 ++++++++++----- + 1 file changed, 10 insertions(+), 5 deletions(-) + +diff --git a/drivers/watchdog/sp5100_tco.c b/drivers/watchdog/sp5100_tco.c +index 6467b91..028618c 100644 +--- a/drivers/watchdog/sp5100_tco.c ++++ b/drivers/watchdog/sp5100_tco.c +@@ -73,6 +73,13 @@ MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started." + /* + * Some TCO specific functions + */ ++ ++static bool tco_has_sp5100_reg_layout(struct pci_dev *dev) ++{ ++ return dev->device == PCI_DEVICE_ID_ATI_SBX00_SMBUS && ++ dev->revision < 0x40; ++} ++ + static void tco_timer_start(void) + { + u32 val; +@@ -129,7 +136,7 @@ static void tco_timer_enable(void) + { + int val; + +- if (sp5100_tco_pci->revision >= 0x40) { ++ if (!tco_has_sp5100_reg_layout(sp5100_tco_pci)) { + /* For SB800 or later */ + /* Set the Watchdog timer resolution to 1 sec */ + outb(SB800_PM_WATCHDOG_CONFIG, SB800_IO_PM_INDEX_REG); +@@ -342,8 +349,7 @@ static unsigned char sp5100_tco_setupdevice(void) + /* + * Determine type of southbridge chipset. + */ +- if (sp5100_tco_pci->device == PCI_DEVICE_ID_ATI_SBX00_SMBUS && +- sp5100_tco_pci->revision < 0x40) { ++ if (tco_has_sp5100_reg_layout(sp5100_tco_pci)) { + dev_name = SP5100_DEVNAME; + index_reg = SP5100_IO_PM_INDEX_REG; + data_reg = SP5100_IO_PM_DATA_REG; +@@ -388,8 +394,7 @@ static unsigned char sp5100_tco_setupdevice(void) + * Secondly, Find the watchdog timer MMIO address + * from SBResource_MMIO register. + */ +- if (sp5100_tco_pci->device == PCI_DEVICE_ID_ATI_SBX00_SMBUS && +- sp5100_tco_pci->revision < 0x40) { ++ if (tco_has_sp5100_reg_layout(sp5100_tco_pci)) { + /* Read SBResource_MMIO from PCI config(PCI_Reg: 9Ch) */ + pci_read_config_dword(sp5100_tco_pci, + SP5100_SB_RESOURCE_MMIO_BASE, &val); +-- +2.7.4 |