[PATCH v2 1/4] tpm: Use a threaded interrupt handler

[Lino Sanfilippo <LinoSanfilippo@gmx.de>]

Interrupt handling at least includes reading and writing the interrupt
status register from the interrupt routine. However over SPI those accesses
require a sleepable context, since a mutex is used in the concerning
functions.
For this reason request a threaded interrupt handler which is running in
(sleepable) process context.

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 e7d1eab..0959559 100644
--- a/drivers/char/tpm/tpm_tis_core.c
+++ b/drivers/char/tpm/tpm_tis_core.c
@@ -781,8 +781,10 @@ 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