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tpm2_i2c_nuvoton: add irq validity check

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In 570a3609 IRQ path is incorrectly always exercised while it should be
exercised only when there is an IRQ number allocated. This commit
reverts the old behavior.

[jarkko.sakkinen@linux.intel.com: updated description]

Fixes: 570a36097f3 ("tpm: drop 'irq' from struct tpm_vendor_specific")
Signed-off-by: Andrew Zamansky <andrew.zamansky@nuvoton.com>
Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
This commit is contained in:
Andrew Zamansky 2016-06-29 12:58:49 +03:00 committed by Jarkko Sakkinen
parent 9754d45e99
commit fa7539b27f
1 changed files with 2 additions and 4 deletions
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6
drivers/char/tpm/tpm_i2c_nuvoton.c
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@ -559,10 +559,8 @@ static int i2c_nuvoton_probe(struct i2c_client *client,
* TPM_INTF_INT_LEVEL_LOW | TPM_INTF_DATA_AVAIL_INT
* The IRQ should be set in the i2c_board_info (which is done
* automatically in of_i2c_register_devices, for device tree users */
chip->flags |= TPM_CHIP_FLAG_IRQ;
priv->irq = client->irq;
if (chip->flags & TPM_CHIP_FLAG_IRQ) {
if (client->irq) {
dev_dbg(dev, "%s() priv->irq\n", __func__);
rc = devm_request_irq(dev, client->irq,
i2c_nuvoton_int_handler,
@ -572,9 +570,9 @@ static int i2c_nuvoton_probe(struct i2c_client *client,
if (rc) {
dev_err(dev, "%s() Unable to request irq: %d for use\n",
__func__, priv->irq);
chip->flags &= ~TPM_CHIP_FLAG_IRQ;
priv->irq = 0;
} else {
chip->flags |= TPM_CHIP_FLAG_IRQ;
/* Clear any pending interrupt */
i2c_nuvoton_ready(chip);
/* - wait for TPM_STS==0xA0 (stsValid, commandReady) */