2 files changed, 36 insertions, 7 deletions

diff --git a/drivers/acpi/blacklist.c b/drivers/acpi/blacklist.c
index e56b2a7b53db..23e5a0519af5 100644
--- a/drivers/acpi/blacklist.c
+++ b/drivers/acpi/blacklist.c
@@ -224,6 +224,7 @@ static struct dmi_system_id acpi_osi_dmi_table[] __initdata = {
          * _OSI(Linux) helps sound
          * DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad R61"),
          * DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad T61"),
+         * T400, T500
          * _OSI(Linux) has Linux specific hooks
          * DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad X61"),
          * _OSI(Linux) is a NOP:
@@ -254,6 +255,22 @@ static struct dmi_system_id acpi_osi_dmi_table[] __initdata = {
                      DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad X61"),
                 },
         },
+        {
+        .callback = dmi_enable_osi_linux,
+        .ident = "Lenovo ThinkPad T400",
+        .matches = {
+                     DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
+                     DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad T400"),
+                },
+        },
+        {
+        .callback = dmi_enable_osi_linux,
+        .ident = "Lenovo ThinkPad T500",
+        .matches = {
+                     DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
+                     DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad T500"),
+                },
+        },
         {}
 };
 
diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c
index d93108d148fc..a848c7e20aeb 100644
--- a/drivers/platform/x86/thinkpad_acpi.c
+++ b/drivers/platform/x86/thinkpad_acpi.c
@@ -1680,36 +1680,48 @@ static void tpacpi_remove_driver_attributes(struct device_driver *drv)
                           | (__bv1) << 8 | (__bv2) }
 
 #define TPV_Q_X(__v, __bid1, __bid2, __bv1, __bv2,      \
-                __eid1, __eid2, __ev1, __ev2)           \
+                __eid, __ev1, __ev2)                    \
         { .vendor       = (__v),                        \
           .bios         = TPID(__bid1, __bid2),         \
-          .ec           = TPID(__eid1, __eid2),         \
+          .ec           = __eid,                        \
           .quirks       = (__ev1) << 24 | (__ev2) << 16 \
                           | (__bv1) << 8 | (__bv2) }
 
 #define TPV_QI0(__id1, __id2, __bv1, __bv2) \
         TPV_Q(PCI_VENDOR_ID_IBM, __id1, __id2, __bv1, __bv2)
 
+/* Outdated IBM BIOSes often lack the EC id string */
 #define TPV_QI1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \
         TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2,        \
-                __bv1, __bv2, __id1, __id2, __ev1, __ev2)
+                __bv1, __bv2, TPID(__id1, __id2),       \
+                __ev1, __ev2),                          \
+        TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2,        \
+                __bv1, __bv2, TPACPI_MATCH_UNKNOWN,     \
+                __ev1, __ev2)
 
+/* Outdated IBM BIOSes often lack the EC id string */
 #define TPV_QI2(__bid1, __bid2, __bv1, __bv2,           \
                 __eid1, __eid2, __ev1, __ev2)           \
         TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2,      \
-                __bv1, __bv2, __eid1, __eid2, __ev1, __ev2)
+                __bv1, __bv2, TPID(__eid1, __eid2),     \
+                __ev1, __ev2),                          \
+        TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2,      \
+                __bv1, __bv2, TPACPI_MATCH_UNKNOWN,     \
+                __ev1, __ev2)
 
 #define TPV_QL0(__id1, __id2, __bv1, __bv2) \
         TPV_Q(PCI_VENDOR_ID_LENOVO, __id1, __id2, __bv1, __bv2)
 
 #define TPV_QL1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \
         TPV_Q_X(PCI_VENDOR_ID_LENOVO, __id1, __id2,     \
-                __bv1, __bv2, __id1, __id2, __ev1, __ev2)
+                __bv1, __bv2, TPID(__id1, __id2),       \
+                __ev1, __ev2)
 
 #define TPV_QL2(__bid1, __bid2, __bv1, __bv2,           \
                 __eid1, __eid2, __ev1, __ev2)           \
         TPV_Q_X(PCI_VENDOR_ID_LENOVO, __bid1, __bid2,   \
-                __bv1, __bv2, __eid1, __eid2, __ev1, __ev2)
+                __bv1, __bv2, TPID(__eid1, __eid2),     \
+                __ev1, __ev2)
 
 static const struct tpacpi_quirk tpacpi_bios_version_qtable[] __initconst = {
         /*  Numeric models ------------------ */
@@ -6313,7 +6325,7 @@ static int brightness_write(char *buf)
          * Doing it this way makes the syscall restartable in case of EINTR
          */
         rc = brightness_set(level);
-        return (rc == -EINTR)? ERESTARTSYS : rc;
+        return (rc == -EINTR)? -ERESTARTSYS : rc;
 }
 
 static struct ibm_struct brightness_driver_data = {