tpm: fix raciness of PPI interface lookup

[cascardo/linux.git] / drivers / char / tpm / tpm.h

diff --git a/drivers/char/tpm/tpm.h b/drivers/char/tpm/tpm.h
index 72ff18c..3409acf 100644 (file)
--- a/drivers/char/tpm/tpm.h
+++ b/drivers/char/tpm/tpm.h
@@ -27,6 +27,7 @@
 #include <linux/platform_device.h>
 #include <linux/io.h>
 #include <linux/tpm.h>
+#include <linux/acpi.h>
 
 enum tpm_const {
        TPM_MINOR = 224,        /* officially assigned */
@@ -94,8 +95,11 @@ struct tpm_vendor_specific {
 #define TPM_VID_WINBOND  0x1050
 #define TPM_VID_STM      0x104A
 
+#define TPM_PPI_VERSION_LEN            3
+
 enum tpm_chip_flags {
        TPM_CHIP_FLAG_REGISTERED        = BIT(0),
+       TPM_CHIP_FLAG_PPI               = BIT(1),
 };
 
 struct tpm_chip {
@@ -114,6 +118,11 @@ struct tpm_chip {
 
        struct dentry **bios_dir;
 
+#ifdef CONFIG_ACPI
+       acpi_handle acpi_dev_handle;
+       char ppi_version[TPM_PPI_VERSION_LEN + 1];
+#endif /* CONFIG_ACPI */
+
        struct list_head list;
 };
 
@@ -345,15 +354,15 @@ void tpm_sysfs_del_device(struct tpm_chip *chip);
 int tpm_pcr_read_dev(struct tpm_chip *chip, int pcr_idx, u8 *res_buf);
 
 #ifdef CONFIG_ACPI
-extern int tpm_add_ppi(struct kobject *);
-extern void tpm_remove_ppi(struct kobject *);
+extern int tpm_add_ppi(struct tpm_chip *chip);
+extern void tpm_remove_ppi(struct tpm_chip *chip);
 #else
-static inline int tpm_add_ppi(struct kobject *parent)
+static inline int tpm_add_ppi(struct tpm_chip *chip)
 {
        return 0;
 }
 
-static inline void tpm_remove_ppi(struct kobject *parent)
+static inline void tpm_remove_ppi(struct tpm_chip *chip)
 {
 }
 #endif