Some AMD based ThinkPads have a firmware bug that calling "GBDC" will cause bluetooth on Intel wireless cards blocked.
Probe these models by DMI match and disable bluetooth subdriver if specified Intel wireless card exist. Signed-off-by: Jiaxun Yang <[email protected]> --- drivers/platform/x86/thinkpad_acpi.c | 70 ++++++++++++++++++++++++++++ 1 file changed, 70 insertions(+) diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c index 726341f2b638..29e835f9368a 100644 --- a/drivers/platform/x86/thinkpad_acpi.c +++ b/drivers/platform/x86/thinkpad_acpi.c @@ -79,6 +79,7 @@ #include <linux/jiffies.h> #include <linux/workqueue.h> #include <linux/acpi.h> +#include <linux/pci.h> #include <linux/pci_ids.h> #include <linux/power_supply.h> #include <sound/core.h> @@ -4501,11 +4502,80 @@ static void bluetooth_exit(void) bluetooth_shutdown(); } +static const struct dmi_system_id bt_fwbug_list[] __initconst = { + { + .ident = "ThinkPad E485", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), + DMI_MATCH(DMI_BOARD_NAME, "20KU"), + }, + }, + { + .ident = "ThinkPad E585", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), + DMI_MATCH(DMI_BOARD_NAME, "20KV"), + }, + }, + { + .ident = "ThinkPad A285 - 20MW", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), + DMI_MATCH(DMI_BOARD_NAME, "20MW"), + }, + }, + { + .ident = "ThinkPad A285 - 20MX", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), + DMI_MATCH(DMI_BOARD_NAME, "20MX"), + }, + }, + { + .ident = "ThinkPad A485 - 20MU", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), + DMI_MATCH(DMI_BOARD_NAME, "20MU"), + }, + }, + { + .ident = "ThinkPad A485 - 20MV", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), + DMI_MATCH(DMI_BOARD_NAME, "20MV"), + }, + }, + {} +}; + +static int __init have_bt_fwbug(void) +{ + /* Some AMD based ThinkPads have a firmware bug that calling + * "GBDC" will cause bluetooth on Intel wireless cards blocked + */ + if (dmi_check_system(bt_fwbug_list)) { + if (pci_get_device(PCI_VENDOR_ID_INTEL, 0x24F3, NULL) || \ + pci_get_device(PCI_VENDOR_ID_INTEL, 0x24FD, NULL) || \ + pci_get_device(PCI_VENDOR_ID_INTEL, 0x2526, NULL)) + return 1; + else + return 0; + } else { + return 0; + } +} + static int __init bluetooth_init(struct ibm_init_struct *iibm) { int res; int status = 0; + if (have_bt_fwbug()) { + vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, + FW_BUG "disable bluetooth subdriver for Intel cards\n"); + return 1; + } + vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, "initializing bluetooth subdriver\n"); -- 2.20.1
