char: tpm: move to use request_irq by IRQF_NO_AUTOEN flag

disable_irq() after request_irq() still has a time gap in which
interrupts can come. request_irq() with IRQF_NO_AUTOEN flag will
disable IRQ auto-enable because of requesting.

Link: https://lore.kernel.org/patchwork/patch/1388765/
Signed-off-by: Tian Tao <[email protected]>
Reviewed-by: Jarkko Sakkinen <[email protected]>
Signed-off-by: Jarkko Sakkinen <[email protected]>

Author: Tian Tao

drivers/char/tpm/tpm_tis_i2c_cr50.c

@@ -706,14 +706,14 @@ static int tpm_cr50_i2c_probe(struct i2c_client *client,
 
 	if (client->irq > 0) {
 		rc = devm_request_irq(dev, client->irq, tpm_cr50_i2c_int_handler,
-				      IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
+				      IRQF_TRIGGER_FALLING | IRQF_ONESHOT |
+				      IRQF_NO_AUTOEN,
 				      dev->driver->name, chip);
 		if (rc < 0) {
 			dev_err(dev, "Failed to probe IRQ %d\n", client->irq);
 			return rc;
 		}
 
-		disable_irq(client->irq);
 		priv->irq = client->irq;
 	} else {
 		dev_warn(dev, "No IRQ, will use %ums delay for TPM ready\n",