Re: [PATCH 1/3 v3] tpm: Remove duplicate code from caps_show() in tpm-sysfs.c
On Thu Aug 29 19, Jerry Snitselaar wrote:
From: Jarkko Sakkinen
Replace existing TPM 1.x version structs with new structs that consolidate
the common parts into a single struct so that code duplication is no longer
needed in caps_show().
Cc: Peter Huewe
Cc: Jason Gunthorpe
Cc: Alexey Klimov
Signed-off-by: Jarkko Sakkinen
Reviewed-by: Jerry Snitselaar
Tested-by: Jerry Snitselaar
---
drivers/char/tpm/tpm-sysfs.c | 44 ++--
drivers/char/tpm/tpm.h | 23 ---
2 files changed, 32 insertions(+), 35 deletions(-)
diff --git a/drivers/char/tpm/tpm-sysfs.c b/drivers/char/tpm/tpm-sysfs.c
index d9caedda075b..e0550f0cfd8f 100644
--- a/drivers/char/tpm/tpm-sysfs.c
+++ b/drivers/char/tpm/tpm-sysfs.c
@@ -217,6 +217,7 @@ static ssize_t caps_show(struct device *dev, struct
device_attribute *attr,
char *buf)
{
struct tpm_chip *chip = to_tpm_chip(dev);
+ struct tpm1_version *version;
ssize_t rc = 0;
char *str = buf;
cap_t cap;
@@ -232,31 +233,30 @@ static ssize_t caps_show(struct device *dev, struct
device_attribute *attr,
str += sprintf(str, "Manufacturer: 0x%x\n",
be32_to_cpu(cap.manufacturer_id));
- /* Try to get a TPM version 1.2 TPM_CAP_VERSION_INFO */
- rc = tpm1_getcap(chip, TPM_CAP_VERSION_1_2, ,
+ /* TPM 1.2 */
+ if (!tpm1_getcap(chip, TPM_CAP_VERSION_1_2, ,
"attempting to determine the 1.2 version",
-sizeof(cap.tpm_version_1_2));
- if (!rc) {
- str += sprintf(str,
- "TCG version: %d.%d\nFirmware version: %d.%d\n",
- cap.tpm_version_1_2.Major,
- cap.tpm_version_1_2.Minor,
- cap.tpm_version_1_2.revMajor,
- cap.tpm_version_1_2.revMinor);
- } else {
- /* Otherwise just use TPM_STRUCT_VER */
- if (tpm1_getcap(chip, TPM_CAP_VERSION_1_1, ,
- "attempting to determine the 1.1 version",
- sizeof(cap.tpm_version)))
- goto out_ops;
- str += sprintf(str,
- "TCG version: %d.%d\nFirmware version: %d.%d\n",
- cap.tpm_version.Major,
- cap.tpm_version.Minor,
- cap.tpm_version.revMajor,
- cap.tpm_version.revMinor);
+sizeof(cap.version2))) {
+ version =
+ goto out_print;
}
+
+ /* TPM 1.1 */
+ if (tpm1_getcap(chip, TPM_CAP_VERSION_1_1, ,
+ "attempting to determine the 1.1 version",
+ sizeof(cap.version1))) {
+ version =
+ goto out_ops;
+ }
Jarkko, does the following change to the above block look good? I'll
submit a v4. With the current patch it is setting version when the
tpm1_getcap fails for 1.1 instead of when it succeeds. I only have
1.2 and 2.0 devices, so I didn't hit it when testing your patch.
+ /* TPM 1.1 */
+ if (tpm1_getcap(chip, TPM_CAP_VERSION_1_1, ,
+ "attempting to determine the 1.1 version",
+ sizeof(cap.version1)))
+ goto out_ops;
+
+ version =
+
+out_print:
+ str += sprintf(str,
+ "TCG version: %d.%d\nFirmware version: %d.%d\n",
+ version->major, version->minor,
+ version->rev_major, version->rev_minor);
+
rc = str - buf;
+
out_ops:
tpm_put_ops(chip);
return rc;
diff --git a/drivers/char/tpm/tpm.h b/drivers/char/tpm/tpm.h
index a7fea3e0ca86..a4f74dd02a35 100644
--- a/drivers/char/tpm/tpm.h
+++ b/drivers/char/tpm/tpm.h
@@ -186,19 +186,16 @@ structstclear_flags_t {
u8 bGlobalLock;
} __packed;
-struct tpm_version_t {
- u8 Major;
- u8 Minor;
- u8 revMajor;
- u8 revMinor;
+struct tpm1_version {
+ u8 major;
+ u8 minor;
+ u8 rev_major;
+ u8 rev_minor;
} __packed;
-struct tpm_version_1_2_t {
- __be16 tag;
- u8 Major;
- u8 Minor;
- u8 revMajor;
- u8 revMinor;
+struct tpm1_version2 {
+ __be16 tag;
+ struct tpm1_version version;
} __packed;
struct timeout_t {
@@ -243,8 +240,8 @@ typedef union {
struct stclear_flags_t stclear_flags;
__u8owned;
__be32 num_pcrs;
- struct tpm_version_t tpm_version;
- struct tpm_version_1_2_t tpm_version_1_2;
+ struct tpm1_version version1;
+ struct tpm1_version2 version2;
__be32 manufacturer_id;
struct timeout_t timeout;
struct duration_t duration;
--
2.21.0
[PATCH 1/3 v3] tpm: Remove duplicate code from caps_show() in tpm-sysfs.c
From: Jarkko Sakkinen
Replace existing TPM 1.x version structs with new structs that consolidate
the common parts into a single struct so that code duplication is no longer
needed in caps_show().
Cc: Peter Huewe
Cc: Jason Gunthorpe
Cc: Alexey Klimov
Signed-off-by: Jarkko Sakkinen
Reviewed-by: Jerry Snitselaar
Tested-by: Jerry Snitselaar
---
drivers/char/tpm/tpm-sysfs.c | 44 ++--
drivers/char/tpm/tpm.h | 23 ---
2 files changed, 32 insertions(+), 35 deletions(-)
diff --git a/drivers/char/tpm/tpm-sysfs.c b/drivers/char/tpm/tpm-sysfs.c
index d9caedda075b..e0550f0cfd8f 100644
--- a/drivers/char/tpm/tpm-sysfs.c
+++ b/drivers/char/tpm/tpm-sysfs.c
@@ -217,6 +217,7 @@ static ssize_t caps_show(struct device *dev, struct
device_attribute *attr,
char *buf)
{
struct tpm_chip *chip = to_tpm_chip(dev);
+ struct tpm1_version *version;
ssize_t rc = 0;
char *str = buf;
cap_t cap;
@@ -232,31 +233,30 @@ static ssize_t caps_show(struct device *dev, struct
device_attribute *attr,
str += sprintf(str, "Manufacturer: 0x%x\n",
be32_to_cpu(cap.manufacturer_id));
- /* Try to get a TPM version 1.2 TPM_CAP_VERSION_INFO */
- rc = tpm1_getcap(chip, TPM_CAP_VERSION_1_2, ,
+ /* TPM 1.2 */
+ if (!tpm1_getcap(chip, TPM_CAP_VERSION_1_2, ,
"attempting to determine the 1.2 version",
-sizeof(cap.tpm_version_1_2));
- if (!rc) {
- str += sprintf(str,
- "TCG version: %d.%d\nFirmware version: %d.%d\n",
- cap.tpm_version_1_2.Major,
- cap.tpm_version_1_2.Minor,
- cap.tpm_version_1_2.revMajor,
- cap.tpm_version_1_2.revMinor);
- } else {
- /* Otherwise just use TPM_STRUCT_VER */
- if (tpm1_getcap(chip, TPM_CAP_VERSION_1_1, ,
- "attempting to determine the 1.1 version",
- sizeof(cap.tpm_version)))
- goto out_ops;
- str += sprintf(str,
- "TCG version: %d.%d\nFirmware version: %d.%d\n",
- cap.tpm_version.Major,
- cap.tpm_version.Minor,
- cap.tpm_version.revMajor,
- cap.tpm_version.revMinor);
+sizeof(cap.version2))) {
+ version =
+ goto out_print;
}
+
+ /* TPM 1.1 */
+ if (tpm1_getcap(chip, TPM_CAP_VERSION_1_1, ,
+ "attempting to determine the 1.1 version",
+ sizeof(cap.version1))) {
+ version =
+ goto out_ops;
+ }
+
+out_print:
+ str += sprintf(str,
+ "TCG version: %d.%d\nFirmware version: %d.%d\n",
+ version->major, version->minor,
+ version->rev_major, version->rev_minor);
+
rc = str - buf;
+
out_ops:
tpm_put_ops(chip);
return rc;
diff --git a/drivers/char/tpm/tpm.h b/drivers/char/tpm/tpm.h
index a7fea3e0ca86..a4f74dd02a35 100644
--- a/drivers/char/tpm/tpm.h
+++ b/drivers/char/tpm/tpm.h
@@ -186,19 +186,16 @@ structstclear_flags_t {
u8 bGlobalLock;
} __packed;
-struct tpm_version_t {
- u8 Major;
- u8 Minor;
- u8 revMajor;
- u8 revMinor;
+struct tpm1_version {
+ u8 major;
+ u8 minor;
+ u8 rev_major;
+ u8 rev_minor;
} __packed;
-struct tpm_version_1_2_t {
- __be16 tag;
- u8 Major;
- u8 Minor;
- u8 revMajor;
- u8 revMinor;
+struct tpm1_version2 {
+ __be16 tag;
+ struct tpm1_version version;
} __packed;
struct timeout_t {
@@ -243,8 +240,8 @@ typedef union {
struct stclear_flags_t stclear_flags;
__u8owned;
__be32 num_pcrs;
- struct tpm_version_t tpm_version;
- struct tpm_version_1_2_t tpm_version_1_2;
+ struct tpm1_version version1;
+ struct tpm1_version2 version2;
__be32 manufacturer_id;
struct timeout_t timeout;
struct duration_t duration;
--
2.21.0
