On Sun, Jun 20, 2021 at 04:34:44AM +0200, Lino Sanfilippo wrote:
Interrupt handling at least includes reading and writing the interrupt status register within the interrupt routine. For accesses over SPI a mutex is used in the concerning functions. Since this requires a sleepable context request a threaded interrupt handler for this case.
Cc: stable@vger.kernel.org Fixes: 1a339b658d9d ("tpm_tis_spi: Pass the SPI IRQ down to the driver") Signed-off-by: Lino Sanfilippo LinoSanfilippo@gmx.de
I'll test this after rc1 PR (I have one NUC which uses tpm_tis_spi).
/Jarkko
This patch has been tested on a SLB9670vq2.0. The first version of this patch was part of patch series (see https://marc.info/?l=linux-integrity&m=162016888020044&w=2)
v2:
- request threaded irq handler only in case of SPI as requested by Jarkko Sakkinen
- add "Fixes" tag
- add stable
- correct short summary
drivers/char/tpm/tpm_tis.c | 2 +- drivers/char/tpm/tpm_tis_core.c | 32 ++++++++++++++++++++-------- drivers/char/tpm/tpm_tis_core.h | 2 +- drivers/char/tpm/tpm_tis_spi_main.c | 3 ++- drivers/char/tpm/tpm_tis_synquacer.c | 2 +- 5 files changed, 28 insertions(+), 13 deletions(-)
diff --git a/drivers/char/tpm/tpm_tis.c b/drivers/char/tpm/tpm_tis.c index 4ed6e660273a..d27009b989fe 100644 --- a/drivers/char/tpm/tpm_tis.c +++ b/drivers/char/tpm/tpm_tis.c @@ -236,7 +236,7 @@ static int tpm_tis_init(struct device *dev, struct tpm_info *tpm_info) phy->priv.flags |= TPM_TIS_ITPM_WORKAROUND; return tpm_tis_core_init(dev, &phy->priv, irq, &tpm_tcg,
ACPI_HANDLE(dev));
ACPI_HANDLE(dev), false);} static SIMPLE_DEV_PM_OPS(tpm_tis_pm, tpm_pm_suspend, tpm_tis_resume); diff --git a/drivers/char/tpm/tpm_tis_core.c b/drivers/char/tpm/tpm_tis_core.c index 55b9d3965ae1..21abc2168d07 100644 --- a/drivers/char/tpm/tpm_tis_core.c +++ b/drivers/char/tpm/tpm_tis_core.c @@ -728,19 +728,31 @@ static int tpm_tis_gen_interrupt(struct tpm_chip *chip)
- everything and leave in polling mode. Returns 0 on success.
*/ static int tpm_tis_probe_irq_single(struct tpm_chip *chip, u32 intmask,
int flags, int irq)
int flags, int irq, bool threaded_irq){ struct tpm_tis_data *priv = dev_get_drvdata(&chip->dev); u8 original_int_vec; int rc; u32 int_status;
- if (devm_request_irq(chip->dev.parent, irq, tis_int_handler, flags,
dev_name(&chip->dev), chip) != 0) {
- if (threaded_irq) {
rc = devm_request_threaded_irq(chip->dev.parent, irq, NULL,tis_int_handler,IRQF_ONESHOT | flags,dev_name(&chip->dev),chip);- } else {
rc = devm_request_irq(chip->dev.parent, irq, tis_int_handler,flags, dev_name(&chip->dev), chip);- }
- if (rc) { dev_info(&chip->dev, "Unable to request irq: %d for probe\n", irq); return -1; }
- priv->irq = irq;
rc = tpm_tis_read8(priv, TPM_INT_VECTOR(priv->locality), @@ -795,7 +807,8 @@ static int tpm_tis_probe_irq_single(struct tpm_chip *chip, u32 intmask,
- do not have ACPI/etc. We typically expect the interrupt to be declared if
- present.
*/ -static void tpm_tis_probe_irq(struct tpm_chip *chip, u32 intmask) +static void tpm_tis_probe_irq(struct tpm_chip *chip, u32 intmask,
bool threaded_irq){ struct tpm_tis_data *priv = dev_get_drvdata(&chip->dev); u8 original_int_vec; @@ -810,10 +823,11 @@ static void tpm_tis_probe_irq(struct tpm_chip *chip, u32 intmask) if (IS_ENABLED(CONFIG_X86)) for (i = 3; i <= 15; i++) if (!tpm_tis_probe_irq_single(chip, intmask, 0,
i))
i, threaded_irq)) return;
original_int_vec))
original_int_vec,threaded_irq))} @@ -909,7 +923,7 @@ static const struct tpm_class_ops tpm_tis = { int tpm_tis_core_init(struct device *dev, struct tpm_tis_data *priv, int irq, const struct tpm_tis_phy_ops *phy_ops,
acpi_handle acpi_dev_handle)
acpi_handle acpi_dev_handle, bool threaded_irq){ u32 vendor; u32 intfcaps; @@ -1049,7 +1063,7 @@ int tpm_tis_core_init(struct device *dev, struct tpm_tis_data *priv, int irq, if (irq) { tpm_tis_probe_irq_single(chip, intmask, IRQF_SHARED,
irq);
irq, threaded_irq); if (!(chip->flags & TPM_CHIP_FLAG_IRQ)) { dev_err(&chip->dev, FW_BUG "TPM interrupt not working, polling instead\n");@@ -1057,7 +1071,7 @@ int tpm_tis_core_init(struct device *dev, struct tpm_tis_data *priv, int irq, disable_interrupts(chip); } } else {
tpm_tis_probe_irq(chip, intmask);
tpm_tis_probe_irq(chip, intmask, threaded_irq);diff --git a/drivers/char/tpm/tpm_tis_core.h b/drivers/char/tpm/tpm_tis_core.h index 9b2d32a59f67..32d36e538208 100644 --- a/drivers/char/tpm/tpm_tis_core.h +++ b/drivers/char/tpm/tpm_tis_core.h @@ -161,7 +161,7 @@ static inline bool is_bsw(void) void tpm_tis_remove(struct tpm_chip *chip); int tpm_tis_core_init(struct device *dev, struct tpm_tis_data *priv, int irq, const struct tpm_tis_phy_ops *phy_ops,
acpi_handle acpi_dev_handle);
acpi_handle acpi_dev_handle, bool use_threaded_irq);#ifdef CONFIG_PM_SLEEP int tpm_tis_resume(struct device *dev); diff --git a/drivers/char/tpm/tpm_tis_spi_main.c b/drivers/char/tpm/tpm_tis_spi_main.c index 3856f6ebcb34..2eb57c1cf9ba 100644 --- a/drivers/char/tpm/tpm_tis_spi_main.c +++ b/drivers/char/tpm/tpm_tis_spi_main.c @@ -199,7 +199,8 @@ int tpm_tis_spi_init(struct spi_device *spi, struct tpm_tis_spi_phy *phy, phy->spi_device = spi;
- return tpm_tis_core_init(&spi->dev, &phy->priv, irq, phy_ops, NULL);
- return tpm_tis_core_init(&spi->dev, &phy->priv, irq, phy_ops, NULL,
true);} static const struct tpm_tis_phy_ops tpm_spi_phy_ops = { diff --git a/drivers/char/tpm/tpm_tis_synquacer.c b/drivers/char/tpm/tpm_tis_synquacer.c index e47bdd272704..6ee59a1fdf08 100644 --- a/drivers/char/tpm/tpm_tis_synquacer.c +++ b/drivers/char/tpm/tpm_tis_synquacer.c @@ -127,7 +127,7 @@ static int tpm_tis_synquacer_init(struct device *dev, return PTR_ERR(phy->iobase); return tpm_tis_core_init(dev, &phy->priv, tpm_info->irq, &tpm_tcg_bw,
ACPI_HANDLE(dev));
ACPI_HANDLE(dev), false);} static SIMPLE_DEV_PM_OPS(tpm_tis_synquacer_pm, tpm_pm_suspend, tpm_tis_resume);
base-commit: 913ec3c22ef425d63dd0bc81fb008ce7f9bcb07b
2.31.1