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-rw-r--r--drivers/char/tpm/tpm-interface.c7
-rw-r--r--drivers/char/tpm/tpm.h1
-rw-r--r--drivers/char/tpm/tpm_tis_core.c20
3 files changed, 18 insertions, 10 deletions
diff --git a/drivers/char/tpm/tpm-interface.c b/drivers/char/tpm/tpm-interface.c
index ffdae1daa138..ef0fcdb40cc3 100644
--- a/drivers/char/tpm/tpm-interface.c
+++ b/drivers/char/tpm/tpm-interface.c
@@ -501,6 +501,9 @@ int tpm_get_timeouts(struct tpm_chip *chip)
unsigned long old_timeout[4];
ssize_t rc;
+ if (chip->flags & TPM_CHIP_FLAG_HAVE_TIMEOUTS)
+ return 0;
+
if (chip->flags & TPM_CHIP_FLAG_TPM2) {
/* Fixed timeouts for TPM2 */
chip->timeout_a = msecs_to_jiffies(TPM2_TIMEOUT_A);
@@ -513,6 +516,8 @@ int tpm_get_timeouts(struct tpm_chip *chip)
msecs_to_jiffies(TPM2_DURATION_MEDIUM);
chip->duration[TPM_LONG] =
msecs_to_jiffies(TPM2_DURATION_LONG);
+
+ chip->flags |= TPM_CHIP_FLAG_HAVE_TIMEOUTS;
return 0;
}
@@ -596,6 +601,8 @@ int tpm_get_timeouts(struct tpm_chip *chip)
chip->duration_adjusted = true;
dev_info(&chip->dev, "Adjusting TPM timeout parameters.");
}
+
+ chip->flags |= TPM_CHIP_FLAG_HAVE_TIMEOUTS;
return 0;
}
EXPORT_SYMBOL_GPL(tpm_get_timeouts);
diff --git a/drivers/char/tpm/tpm.h b/drivers/char/tpm/tpm.h
index 186493234c52..21c3dbe8c89c 100644
--- a/drivers/char/tpm/tpm.h
+++ b/drivers/char/tpm/tpm.h
@@ -143,6 +143,7 @@ enum tpm_chip_flags {
TPM_CHIP_FLAG_TPM2 = BIT(1),
TPM_CHIP_FLAG_IRQ = BIT(2),
TPM_CHIP_FLAG_VIRTUAL = BIT(3),
+ TPM_CHIP_FLAG_HAVE_TIMEOUTS = BIT(4),
};
struct tpm_chip {
diff --git a/drivers/char/tpm/tpm_tis_core.c b/drivers/char/tpm/tpm_tis_core.c
index 2d1e451fb1b3..7993678954a2 100644
--- a/drivers/char/tpm/tpm_tis_core.c
+++ b/drivers/char/tpm/tpm_tis_core.c
@@ -777,20 +777,20 @@ int tpm_tis_core_init(struct device *dev, struct tpm_tis_data *priv, int irq,
if (intfcaps & TPM_INTF_DATA_AVAIL_INT)
dev_dbg(dev, "\tData Avail Int Support\n");
- /* Very early on issue a command to the TPM in polling mode to make
- * sure it works. May as well use that command to set the proper
- * timeouts for the driver.
- */
- if (tpm_get_timeouts(chip)) {
- dev_err(dev, "Could not get TPM timeouts and durations\n");
- rc = -ENODEV;
- goto out_err;
- }
-
/* INTERRUPT Setup */
init_waitqueue_head(&priv->read_queue);
init_waitqueue_head(&priv->int_queue);
if (irq != -1) {
+ /* Before doing irq testing issue a command to the TPM in polling mode
+ * to make sure it works. May as well use that command to set the
+ * proper timeouts for the driver.
+ */
+ if (tpm_get_timeouts(chip)) {
+ dev_err(dev, "Could not get TPM timeouts and durations\n");
+ rc = -ENODEV;
+ goto out_err;
+ }
+
if (irq) {
tpm_tis_probe_irq_single(chip, intmask, IRQF_SHARED,
irq);