From 4866b1dce0389013a268f0ab63f7229b30c6e5fe Mon Sep 17 00:00:00 2001 From: Corey Minyard Date: Thu, 8 Mar 2018 15:00:28 -0600 Subject: ipmi: Remove ACPI SPMI probing from the SSIF (I2C) driver MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The IPMI spec states: The purpose of the SPMI Table is to provide a mechanism that can be used by the OSPM (an ACPI term for “OS Operating System-directed configuration and Power Management” essentially meaning an ACPI-aware OS or OS loader) very early in the boot process, e.g., before the ability to execute ACPI control methods in the OS is available. When we are probing IPMI in Linux, ACPI control methods are available, so we shouldn't be probing using SPMI. It could cause some confusion during the probing process. Signed-off-by: Corey Minyard Tested-by: Jiandi An --- drivers/char/ipmi/ipmi_ssif.c | 105 ------------------------------------------ 1 file changed, 105 deletions(-) (limited to 'drivers/char') diff --git a/drivers/char/ipmi/ipmi_ssif.c b/drivers/char/ipmi/ipmi_ssif.c index 9d3b0fa27560..cd7693634e91 100644 --- a/drivers/char/ipmi/ipmi_ssif.c +++ b/drivers/char/ipmi/ipmi_ssif.c @@ -1902,108 +1902,6 @@ static const struct acpi_device_id ssif_acpi_match[] = { { }, }; MODULE_DEVICE_TABLE(acpi, ssif_acpi_match); - -/* - * Once we get an ACPI failure, we don't try any more, because we go - * through the tables sequentially. Once we don't find a table, there - * are no more. - */ -static int acpi_failure; - -/* - * Defined in the IPMI 2.0 spec. - */ -struct SPMITable { - s8 Signature[4]; - u32 Length; - u8 Revision; - u8 Checksum; - s8 OEMID[6]; - s8 OEMTableID[8]; - s8 OEMRevision[4]; - s8 CreatorID[4]; - s8 CreatorRevision[4]; - u8 InterfaceType; - u8 IPMIlegacy; - s16 SpecificationRevision; - - /* - * Bit 0 - SCI interrupt supported - * Bit 1 - I/O APIC/SAPIC - */ - u8 InterruptType; - - /* - * If bit 0 of InterruptType is set, then this is the SCI - * interrupt in the GPEx_STS register. - */ - u8 GPE; - - s16 Reserved; - - /* - * If bit 1 of InterruptType is set, then this is the I/O - * APIC/SAPIC interrupt. - */ - u32 GlobalSystemInterrupt; - - /* The actual register address. */ - struct acpi_generic_address addr; - - u8 UID[4]; - - s8 spmi_id[1]; /* A '\0' terminated array starts here. */ -}; - -static int try_init_spmi(struct SPMITable *spmi) -{ - unsigned short myaddr; - - if (num_addrs >= MAX_SSIF_BMCS) - return -1; - - if (spmi->IPMIlegacy != 1) { - pr_warn("IPMI: Bad SPMI legacy: %d\n", spmi->IPMIlegacy); - return -ENODEV; - } - - if (spmi->InterfaceType != 4) - return -ENODEV; - - if (spmi->addr.space_id != ACPI_ADR_SPACE_SMBUS) { - pr_warn(PFX "Invalid ACPI SSIF I/O Address type: %d\n", - spmi->addr.space_id); - return -EIO; - } - - myaddr = spmi->addr.address & 0x7f; - - return new_ssif_client(myaddr, NULL, 0, 0, SI_SPMI, NULL); -} - -static void spmi_find_bmc(void) -{ - acpi_status status; - struct SPMITable *spmi; - int i; - - if (acpi_disabled) - return; - - if (acpi_failure) - return; - - for (i = 0; ; i++) { - status = acpi_get_table(ACPI_SIG_SPMI, i+1, - (struct acpi_table_header **)&spmi); - if (status != AE_OK) - return; - - try_init_spmi(spmi); - } -} -#else -static void spmi_find_bmc(void) { } #endif #ifdef CONFIG_DMI @@ -2108,9 +2006,6 @@ static int init_ipmi_ssif(void) ssif_i2c_driver.driver.acpi_match_table = ACPI_PTR(ssif_acpi_match); - if (ssif_tryacpi) - spmi_find_bmc(); - if (ssif_trydmi) { rv = platform_driver_register(&ipmi_driver); if (rv) -- cgit v1.2.3