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Subject[PATCH 1/4] tpm: Use a threaded interrupt handler
Date
Writing and reading registers over SPI requires a sleepable context, since
a mutex is used in the concerning functions. So instead of installing a
generic interrupt handler use one for threaded interrupts. This provides
the same functionality as before but also allows SPI functions to be
called.

Signed-off-by: Lino Sanfilippo <LinoSanfilippo@gmx.de>
---
drivers/char/tpm/tpm_tis_core.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/char/tpm/tpm_tis_core.c b/drivers/char/tpm/tpm_tis_core.c
index 92c51c6..2c956a1 100644
--- a/drivers/char/tpm/tpm_tis_core.c
+++ b/drivers/char/tpm/tpm_tis_core.c
@@ -771,8 +771,10 @@ static int tpm_tis_probe_irq_single(struct tpm_chip *chip, u32 intmask,
int rc;
u32 int_status;

- if (devm_request_irq(chip->dev.parent, irq, tis_int_handler, flags,
- dev_name(&chip->dev), chip) != 0) {
+
+ if (devm_request_threaded_irq(chip->dev.parent, irq, NULL,
+ tis_int_handler, IRQF_ONESHOT | flags,
+ dev_name(&chip->dev), chip) != 0) {
dev_info(&chip->dev, "Unable to request irq: %d for probe\n",
irq);
return -1;
--
2.7.4
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