tpmdd updates for Linux v5.16

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Merge tag 'tpmdd-next-v5.16' of git://git.kernel.org/pub/scm/linux/kernel/git/jarkko/linux-tpmdd

Pull tpm updates from Jarkko Sakkinen:
 "Only bug fixes"

* tag 'tpmdd-next-v5.16' of git://git.kernel.org/pub/scm/linux/kernel/git/jarkko/linux-tpmdd:
  tpm_tis_spi: Add missing SPI ID
  tpm: fix Atmel TPM crash caused by too frequent queries
  tpm: Check for integer overflow in tpm2_map_response_body()
  tpm: tis: Kconfig: Add helper dependency on COMPILE_TEST

drivers/char/tpm/Kconfig

@@ -76,7 +76,7 @@ config TCG_TIS_SPI_CR50
 
 config TCG_TIS_SYNQUACER
 	tristate "TPM Interface Specification 1.2 Interface / TPM 2.0 FIFO Interface (MMIO - SynQuacer)"
-	depends on ARCH_SYNQUACER
+	depends on ARCH_SYNQUACER || COMPILE_TEST
 	select TCG_TIS_CORE
 	help
 	  If you have a TPM security chip that is compliant with the

drivers/char/tpm/tpm2-space.c

@@ -455,6 +455,9 @@ static int tpm2_map_response_body(struct tpm_chip *chip, u32 cc, u8 *rsp,
 	if (be32_to_cpu(data->capability) != TPM2_CAP_HANDLES)
 		return 0;
 
+	if (be32_to_cpu(data->count) > (UINT_MAX - TPM_HEADER_SIZE - 9) / 4)
+		return -EFAULT;
+
 	if (len != TPM_HEADER_SIZE + 9 + 4 * be32_to_cpu(data->count))
 		return -EFAULT;
 

drivers/char/tpm/tpm_tis_core.c

@@ -48,6 +48,7 @@ static int wait_for_tpm_stat(struct tpm_chip *chip, u8 mask,
 		unsigned long timeout, wait_queue_head_t *queue,
 		bool check_cancel)
 {
+	struct tpm_tis_data *priv = dev_get_drvdata(&chip->dev);
 	unsigned long stop;
 	long rc;
 	u8 status;
@@ -80,8 +81,8 @@ again:
 		}
 	} else {
 		do {
-			usleep_range(TPM_TIMEOUT_USECS_MIN,
-				     TPM_TIMEOUT_USECS_MAX);
+			usleep_range(priv->timeout_min,
+				     priv->timeout_max);
 			status = chip->ops->status(chip);
 			if ((status & mask) == mask)
 				return 0;
@@ -945,7 +946,22 @@ int tpm_tis_core_init(struct device *dev, struct tpm_tis_data *priv, int irq,
 	chip->timeout_b = msecs_to_jiffies(TIS_TIMEOUT_B_MAX);
 	chip->timeout_c = msecs_to_jiffies(TIS_TIMEOUT_C_MAX);
 	chip->timeout_d = msecs_to_jiffies(TIS_TIMEOUT_D_MAX);
+	priv->timeout_min = TPM_TIMEOUT_USECS_MIN;
+	priv->timeout_max = TPM_TIMEOUT_USECS_MAX;
 	priv->phy_ops = phy_ops;
+
+	rc = tpm_tis_read32(priv, TPM_DID_VID(0), &vendor);
+	if (rc < 0)
+		goto out_err;
+
+	priv->manufacturer_id = vendor;
+
+	if (priv->manufacturer_id == TPM_VID_ATML &&
+		!(chip->flags & TPM_CHIP_FLAG_TPM2)) {
+		priv->timeout_min = TIS_TIMEOUT_MIN_ATML;
+		priv->timeout_max = TIS_TIMEOUT_MAX_ATML;
+	}
+
 	dev_set_drvdata(&chip->dev, priv);
 
 	if (is_bsw()) {
@@ -988,12 +1004,6 @@ int tpm_tis_core_init(struct device *dev, struct tpm_tis_data *priv, int irq,
 	if (rc)
 		goto out_err;
 
-	rc = tpm_tis_read32(priv, TPM_DID_VID(0), &vendor);
-	if (rc < 0)
-		goto out_err;
-
-	priv->manufacturer_id = vendor;
-
 	rc = tpm_tis_read8(priv, TPM_RID(0), &rid);
 	if (rc < 0)
 		goto out_err;

drivers/char/tpm/tpm_tis_core.h

@@ -54,6 +54,8 @@ enum tis_defaults {
 	TIS_MEM_LEN = 0x5000,
 	TIS_SHORT_TIMEOUT = 750,	/* ms */
 	TIS_LONG_TIMEOUT = 2000,	/* 2 sec */
+	TIS_TIMEOUT_MIN_ATML = 14700,	/* usecs */
+	TIS_TIMEOUT_MAX_ATML = 15000,	/* usecs */
 };
 
 /* Some timeout values are needed before it is known whether the chip is
@@ -98,6 +100,8 @@ struct tpm_tis_data {
 	wait_queue_head_t read_queue;
 	const struct tpm_tis_phy_ops *phy_ops;
 	unsigned short rng_quality;
+	unsigned int timeout_min; /* usecs */
+	unsigned int timeout_max; /* usecs */
 };
 
 struct tpm_tis_phy_ops {

drivers/char/tpm/tpm_tis_spi_main.c

@@ -267,6 +267,7 @@ static const struct spi_device_id tpm_tis_spi_id[] = {
 	{ "st33htpm-spi", (unsigned long)tpm_tis_spi_probe },
 	{ "slb9670", (unsigned long)tpm_tis_spi_probe },
 	{ "tpm_tis_spi", (unsigned long)tpm_tis_spi_probe },
+	{ "tpm_tis-spi", (unsigned long)tpm_tis_spi_probe },
 	{ "cr50", (unsigned long)cr50_spi_probe },
 	{}
 };

include/linux/tpm.h

@@ -269,6 +269,7 @@ enum tpm2_cc_attrs {
 #define TPM_VID_INTEL    0x8086
 #define TPM_VID_WINBOND  0x1050
 #define TPM_VID_STM      0x104A
+#define TPM_VID_ATML     0x1114
 
 enum tpm_chip_flags {
 	TPM_CHIP_FLAG_TPM2		= BIT(1),