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From: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
To: linux-integrity@vger.kernel.org
Cc: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>,
	stable@vger.kernel.org, Hans de Goede <hdegoede@redhat.com>,
	Peter Huewe <peterhuewe@gmx.de>, Jason Gunthorpe <jgg@ziepe.ca>,
	Arnd Bergmann <arnd@arndb.de>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	linux-kernel@vger.kernel.org (open list)
Subject: [PATCH] tpm/tpm_tis: Free IRQ if probing fails
Date: Sun, 12 Apr 2020 20:04:12 +0300	[thread overview]
Message-ID: <20200412170412.324200-1-jarkko.sakkinen@linux.intel.com> (raw)

Call devm_free_irq() if we have to revert to polling in order not to
unnecessarily reserve the IRQ for the life-cycle of the driver.

Cc: stable@vger.kernel.org # 4.5.x
Reported-by: Hans de Goede <hdegoede@redhat.com>
Fixes: e3837e74a06d ("tpm_tis: Refactor the interrupt setup")
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
---
 drivers/char/tpm/tpm_tis_core.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/char/tpm/tpm_tis_core.c b/drivers/char/tpm/tpm_tis_core.c
index 27c6ca031e23..ae6868e7b696 100644
--- a/drivers/char/tpm/tpm_tis_core.c
+++ b/drivers/char/tpm/tpm_tis_core.c
@@ -1062,9 +1062,12 @@ 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);
-			if (!(chip->flags & TPM_CHIP_FLAG_IRQ))
+			if (!(chip->flags & TPM_CHIP_FLAG_IRQ)) {
 				dev_err(&chip->dev, FW_BUG
 					"TPM interrupt not working, polling instead\n");
+				devm_free_irq(chip->dev.parent, priv->irq,
+					      chip);
+			}
 		} else {
 			tpm_tis_probe_irq(chip, intmask);
 		}
-- 
2.25.1


             reply	other threads:[~2020-04-12 17:10 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-04-12 17:04 Jarkko Sakkinen [this message]
2020-04-13 10:04 ` [PATCH] tpm/tpm_tis: Free IRQ if probing fails Hans de Goede
2020-04-13 18:07   ` Jarkko Sakkinen
2020-04-13 18:11     ` Hans de Goede
2020-04-14  7:13       ` Jarkko Sakkinen
2020-04-14  8:26         ` Hans de Goede
2020-04-14 16:04           ` Jarkko Sakkinen
2020-04-14 16:45             ` Jarkko Sakkinen
2020-04-14 17:15               ` Hans de Goede
2020-04-16 13:13                 ` Jarkko Sakkinen

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