The tis driver does a tpm_get_timeouts out side of tpm_chip_register,
and tpm_get_timeouts can print a message, resulting in two prints, eg:
tpm tpm0: [Hardware Error]: Adjusting reported timeouts: A 10000->750000us B
10000->2000000us C 10000->750000us D 10000->750000us
Keep track and prevent tpm_get_timeouts from running a second time, and
clarify the purpose of the call in tpm_tis_core to only be connected to
irq testing.
Signed-off-by: Jason Gunthorpe <jguntho...@obsidianresearch.com>
---
drivers/char/tpm/tpm-interface.c | 7 +++++++
drivers/char/tpm/tpm.h | 1 +
drivers/char/tpm/tpm_tis_core.c | 20 ++++++++++----------
3 files changed, 18 insertions(+), 10 deletions(-)
diff --git a/drivers/char/tpm/tpm-interface.c b/drivers/char/tpm/tpm-interface.c
index aef20ee2331a..d0285faa4f1b 100644
--- a/drivers/char/tpm/tpm-interface.c
+++ b/drivers/char/tpm/tpm-interface.c
@@ -505,6 +505,9 @@ int tpm_get_timeouts(struct tpm_chip *chip)
struct duration_t *duration_cap;
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);
@@ -517,6 +520,8 @@ 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;
}
@@ -630,6 +635,8 @@ duration:
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 b0585e99da49..2611459271e5 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 d66f51b3648e..193bee4d70e0 100644
--- a/drivers/char/tpm/tpm_tis_core.c
+++ b/drivers/char/tpm/tpm_tis_core.c
@@ -749,20 +749,20 @@ 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);
--
2.1.4
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