From ef7b81dc78642e1a33c890acf3214d1e04c90a8f Mon Sep 17 00:00:00 2001 From: Jason Gunthorpe Date: Thu, 7 Jan 2016 17:36:21 -0700 Subject: [PATCH] tpm_tis: Disable interrupt auto probing on a per-device basis Instead of clearing the global interrupts flag when any device does not have an interrupt just pass -1 through tpm_info.irq. The only thing that asks for autoprobing is the force=1 path. Signed-off-by: Jason Gunthorpe Tested-by: Wilck, Martin Tested-by: Jarkko Sakkinen Reviewed-by: Jarkko Sakkinen Acked-by: Peter Huewe --- drivers/char/tpm/tpm_tis.c | 18 ++++++++++-------- 1 file changed, 10 insertions(+), 8 deletions(-) diff --git a/drivers/char/tpm/tpm_tis.c b/drivers/char/tpm/tpm_tis.c index eb31644111a6..d993fed51f23 100644 --- a/drivers/char/tpm/tpm_tis.c +++ b/drivers/char/tpm/tpm_tis.c @@ -68,7 +68,11 @@ enum tis_defaults { struct tpm_info { unsigned long start; unsigned long len; - unsigned int irq; + /* irq > 0 means: use irq $irq; + * irq = 0 means: autoprobe for an irq; + * irq = -1 means: no irq support + */ + int irq; }; static struct tpm_info tis_default_info = { @@ -806,7 +810,7 @@ static int tpm_tis_init(struct device *dev, struct tpm_info *tpm_info, /* INTERRUPT Setup */ init_waitqueue_head(&chip->vendor.read_queue); init_waitqueue_head(&chip->vendor.int_queue); - if (interrupts) { + if (interrupts && tpm_info->irq != -1) { if (tpm_info->irq) { tpm_tis_probe_irq_single(chip, intmask, IRQF_SHARED, tpm_info->irq); @@ -894,9 +898,9 @@ static SIMPLE_DEV_PM_OPS(tpm_tis_pm, tpm_pm_suspend, tpm_tis_resume); #ifdef CONFIG_PNP static int tpm_tis_pnp_init(struct pnp_dev *pnp_dev, - const struct pnp_device_id *pnp_id) + const struct pnp_device_id *pnp_id) { - struct tpm_info tpm_info = tis_default_info; + struct tpm_info tpm_info = {}; acpi_handle acpi_dev_handle = NULL; tpm_info.start = pnp_mem_start(pnp_dev, 0); @@ -905,7 +909,7 @@ static int tpm_tis_pnp_init(struct pnp_dev *pnp_dev, if (pnp_irq_valid(pnp_dev, 0)) tpm_info.irq = pnp_irq(pnp_dev, 0); else - interrupts = false; + tpm_info.irq = -1; #ifdef CONFIG_ACPI if (pnp_acpi_device(pnp_dev)) { @@ -983,6 +987,7 @@ static int tpm_tis_acpi_init(struct acpi_device *acpi_dev) return -ENODEV; INIT_LIST_HEAD(&resources); + tpm_info.irq = -1; ret = acpi_dev_get_resources(acpi_dev, &resources, tpm_check_resource, &tpm_info); if (ret < 0) @@ -990,9 +995,6 @@ static int tpm_tis_acpi_init(struct acpi_device *acpi_dev) acpi_dev_free_resource_list(&resources); - if (!tpm_info.irq) - interrupts = false; - if (is_itpm(acpi_dev)) itpm = true; -- 2.39.5