lkml.org 
[lkml]   [2021]   [Apr]   [25]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v2 1/4] tpm: Use a threaded interrupt handler
Date
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
\
 
 \ /
  Last update: 2021-04-26 01:49    [W:0.111 / U:0.312 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site