8 files changed, 38 insertions, 57 deletions

diff --git a/drivers/char/tpm/tpm-chip.c b/drivers/char/tpm/tpm-chip.c
index e25daf2396d3..082b910ddf0d 100644
--- a/drivers/char/tpm/tpm-chip.c
+++ b/drivers/char/tpm/tpm-chip.c
@@ -231,42 +231,6 @@ struct tpm_chip *tpm_default_chip(void)
 EXPORT_SYMBOL_GPL(tpm_default_chip);
 
 /**
- * tpm_find_get_ops() - find and reserve a TPM chip
- * @chip:	a &struct tpm_chip instance, %NULL for the default chip
- *
- * Finds a TPM chip and reserves its class device and operations. The chip must
- * be released with tpm_put_ops() after use.
- * This function is for internal use only. It supports existing TPM callers
- * by accepting NULL, but those callers should be converted to pass in a chip
- * directly.
- *
- * Return:
- * A reserved &struct tpm_chip instance.
- * %NULL if a chip is not found.
- * %NULL if the chip is not available.
- */
-struct tpm_chip *tpm_find_get_ops(struct tpm_chip *chip)
-{
-	int rc;
-
-	if (chip) {
-		if (!tpm_try_get_ops(chip))
-			return chip;
-		return NULL;
-	}
-
-	chip = tpm_default_chip();
-	if (!chip)
-		return NULL;
-	rc = tpm_try_get_ops(chip);
-	/* release additional reference we got from tpm_default_chip() */
-	put_device(&chip->dev);
-	if (rc)
-		return NULL;
-	return chip;
-}
-
-/**
  * tpm_dev_release() - free chip memory and the device number
  * @dev: the character device for the TPM chip
  *
@@ -282,7 +246,6 @@ static void tpm_dev_release(struct device *dev)
 
 	kfree(chip->work_space.context_buf);
 	kfree(chip->work_space.session_buf);
-	kfree(chip->allocated_banks);
 #ifdef CONFIG_TCG_TPM2_HMAC
 	kfree(chip->auth);
 #endif
diff --git a/drivers/char/tpm/tpm-dev-common.c b/drivers/char/tpm/tpm-dev-common.c
index f2a5e09257dd..f942c0c8e402 100644
--- a/drivers/char/tpm/tpm-dev-common.c
+++ b/drivers/char/tpm/tpm-dev-common.c
@@ -275,7 +275,8 @@ void tpm_common_release(struct file *file, struct file_priv *priv)
 
 int __init tpm_dev_common_init(void)
 {
-	tpm_dev_wq = alloc_workqueue("tpm_dev_wq", WQ_MEM_RECLAIM, 0);
+	tpm_dev_wq = alloc_workqueue("tpm_dev_wq", WQ_MEM_RECLAIM | WQ_PERCPU,
+				     0);
 
 	return !tpm_dev_wq ? -ENOMEM : 0;
 }
diff --git a/drivers/char/tpm/tpm-interface.c b/drivers/char/tpm/tpm-interface.c
index c9f173001d0e..f745a098908b 100644
--- a/drivers/char/tpm/tpm-interface.c
+++ b/drivers/char/tpm/tpm-interface.c
@@ -313,10 +313,13 @@ int tpm_is_tpm2(struct tpm_chip *chip)
 {
 	int rc;
 
-	chip = tpm_find_get_ops(chip);
 	if (!chip)
 		return -ENODEV;
 
+	rc = tpm_try_get_ops(chip);
+	if (rc)
+		return rc;
+
 	rc = (chip->flags & TPM_CHIP_FLAG_TPM2) != 0;
 
 	tpm_put_ops(chip);
@@ -338,10 +341,13 @@ int tpm_pcr_read(struct tpm_chip *chip, u32 pcr_idx,
 {
 	int rc;
 
-	chip = tpm_find_get_ops(chip);
 	if (!chip)
 		return -ENODEV;
 
+	rc = tpm_try_get_ops(chip);
+	if (rc)
+		return rc;
+
 	if (chip->flags & TPM_CHIP_FLAG_TPM2)
 		rc = tpm2_pcr_read(chip, pcr_idx, digest, NULL);
 	else
@@ -369,10 +375,13 @@ int tpm_pcr_extend(struct tpm_chip *chip, u32 pcr_idx,
 	int rc;
 	int i;
 
-	chip = tpm_find_get_ops(chip);
 	if (!chip)
 		return -ENODEV;
 
+	rc = tpm_try_get_ops(chip);
+	if (rc)
+		return rc;
+
 	for (i = 0; i < chip->nr_allocated_banks; i++) {
 		if (digests[i].alg_id != chip->allocated_banks[i].alg_id) {
 			rc = -EINVAL;
@@ -492,10 +501,13 @@ int tpm_get_random(struct tpm_chip *chip, u8 *out, size_t max)
 	if (!out || max > TPM_MAX_RNG_DATA)
 		return -EINVAL;
 
-	chip = tpm_find_get_ops(chip);
 	if (!chip)
 		return -ENODEV;
 
+	rc = tpm_try_get_ops(chip);
+	if (rc)
+		return rc;
+
 	if (chip->flags & TPM_CHIP_FLAG_TPM2)
 		rc = tpm2_get_random(chip, out, max);
 	else
diff --git a/drivers/char/tpm/tpm.h b/drivers/char/tpm/tpm.h
index 2726bd38e5ac..02c07fef41ba 100644
--- a/drivers/char/tpm/tpm.h
+++ b/drivers/char/tpm/tpm.h
@@ -267,7 +267,6 @@ static inline void tpm_msleep(unsigned int delay_msec)
 int tpm_chip_bootstrap(struct tpm_chip *chip);
 int tpm_chip_start(struct tpm_chip *chip);
 void tpm_chip_stop(struct tpm_chip *chip);
-struct tpm_chip *tpm_find_get_ops(struct tpm_chip *chip);
 
 struct tpm_chip *tpm_chip_alloc(struct device *dev,
 				const struct tpm_class_ops *ops);
diff --git a/drivers/char/tpm/tpm1-cmd.c b/drivers/char/tpm/tpm1-cmd.c
index cf64c7385105..b49a790f1bd5 100644
--- a/drivers/char/tpm/tpm1-cmd.c
+++ b/drivers/char/tpm/tpm1-cmd.c
@@ -799,11 +799,6 @@ int tpm1_pm_suspend(struct tpm_chip *chip, u32 tpm_suspend_pcr)
  */
 int tpm1_get_pcr_allocation(struct tpm_chip *chip)
 {
-	chip->allocated_banks = kcalloc(1, sizeof(*chip->allocated_banks),
-					GFP_KERNEL);
-	if (!chip->allocated_banks)
-		return -ENOMEM;
-
 	chip->allocated_banks[0].alg_id = TPM_ALG_SHA1;
 	chip->allocated_banks[0].digest_size = hash_digest_size[HASH_ALGO_SHA1];
 	chip->allocated_banks[0].crypto_id = HASH_ALGO_SHA1;
diff --git a/drivers/char/tpm/tpm2-cmd.c b/drivers/char/tpm/tpm2-cmd.c
index 7d77f6fbc152..dd502322f499 100644
--- a/drivers/char/tpm/tpm2-cmd.c
+++ b/drivers/char/tpm/tpm2-cmd.c
@@ -18,7 +18,7 @@ static bool disable_pcr_integrity;
 module_param(disable_pcr_integrity, bool, 0444);
 MODULE_PARM_DESC(disable_pcr_integrity, "Disable integrity protection of TPM2_PCR_Extend");
 
-static struct tpm2_hash tpm2_hash_map[] = {
+struct tpm2_hash tpm2_hash_map[] = {
 	{HASH_ALGO_SHA1, TPM_ALG_SHA1},
 	{HASH_ALGO_SHA256, TPM_ALG_SHA256},
 	{HASH_ALGO_SHA384, TPM_ALG_SHA384},
@@ -26,6 +26,18 @@ static struct tpm2_hash tpm2_hash_map[] = {
 	{HASH_ALGO_SM3_256, TPM_ALG_SM3_256},
 };
 
+int tpm2_find_hash_alg(unsigned int crypto_id)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(tpm2_hash_map); i++)
+		if (crypto_id == tpm2_hash_map[i].crypto_id)
+			return tpm2_hash_map[i].tpm_id;
+
+	return -EINVAL;
+}
+EXPORT_SYMBOL_GPL(tpm2_find_hash_alg);
+
 int tpm2_get_timeouts(struct tpm_chip *chip)
 {
 	chip->timeout_a = msecs_to_jiffies(TPM2_TIMEOUT_A);
@@ -538,11 +550,9 @@ ssize_t tpm2_get_pcr_allocation(struct tpm_chip *chip)
 
 	nr_possible_banks = be32_to_cpup(
 		(__be32 *)&buf.data[TPM_HEADER_SIZE + 5]);
-
-	chip->allocated_banks = kcalloc(nr_possible_banks,
-					sizeof(*chip->allocated_banks),
-					GFP_KERNEL);
-	if (!chip->allocated_banks) {
+	if (nr_possible_banks > TPM2_MAX_PCR_BANKS) {
+		pr_err("tpm: out of bank capacity: %u > %u\n",
+		       nr_possible_banks, TPM2_MAX_PCR_BANKS);
 		rc = -ENOMEM;
 		goto out;
 	}
diff --git a/drivers/char/tpm/tpm_crb.c b/drivers/char/tpm/tpm_crb.c
index c75a531cfb98..6c25305c256e 100644
--- a/drivers/char/tpm/tpm_crb.c
+++ b/drivers/char/tpm/tpm_crb.c
@@ -179,6 +179,7 @@ static int crb_try_pluton_doorbell(struct crb_priv *priv, bool wait_for_complete
  *
  * @dev:  crb device
  * @priv: crb private data
+ * @loc:  locality
  *
  * Write CRB_CTRL_REQ_GO_IDLE to TPM_CRB_CTRL_REQ
  * The device should respond within TIMEOUT_C by clearing the bit.
@@ -233,6 +234,7 @@ static int crb_go_idle(struct tpm_chip *chip)
  *
  * @dev:  crb device
  * @priv: crb private data
+ * @loc:  locality
  *
  * Write CRB_CTRL_REQ_CMD_READY to TPM_CRB_CTRL_REQ
  * and poll till the device acknowledge it by clearing the bit.
@@ -412,7 +414,7 @@ static int crb_do_acpi_start(struct tpm_chip *chip)
 #ifdef CONFIG_ARM64
 /*
  * This is a TPM Command Response Buffer start method that invokes a
- * Secure Monitor Call to requrest the firmware to execute or cancel
+ * Secure Monitor Call to request the firmware to execute or cancel
  * a TPM 2.0 command.
  */
 static int tpm_crb_smc_start(struct device *dev, unsigned long func_id)
diff --git a/drivers/char/tpm/tpm_tis_core.c b/drivers/char/tpm/tpm_tis_core.c
index 8954a8660ffc..e2a1769081b1 100644
--- a/drivers/char/tpm/tpm_tis_core.c
+++ b/drivers/char/tpm/tpm_tis_core.c
@@ -265,8 +265,7 @@ static u8 tpm_tis_status(struct tpm_chip *chip)
 
 			/*
 			 * Dump stack for forensics, as invalid TPM_STS.x could be
-			 * potentially triggered by impaired tpm_try_get_ops() or
-			 * tpm_find_get_ops().
+			 * potentially triggered by impaired tpm_try_get_ops().
 			 */
 			dump_stack();
 		}