linux-kernel - [PATCH 5.4 052/177] tpm: Switch to platform_get_irq

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Message-Id: <20191216174830.514921087@linuxfoundation.org>
Date:   Mon, 16 Dec 2019 18:48:28 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Hans de Goede <hdegoede@...hat.com>,
        Jerry Snitselaar <jsnitsel@...hat.com>,
        Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
Subject: [PATCH 5.4 052/177] tpm: Switch to platform_get_irq_optional()

From: Hans de Goede <hdegoede@...hat.com>

commit 9c8c5742b6af76a3fd93b4e56d1d981173cf9016 upstream.

platform_get_irq() calls dev_err() on an error. As the IRQ usage in the
tpm_tis driver is optional, this is undesirable.

Specifically this leads to this new false-positive error being logged:
[    5.135413] tpm_tis MSFT0101:00: IRQ index 0 not found

This commit switches to platform_get_irq_optional(), which does not log
an error, fixing this.

Fixes: 7723f4c5ecdb ("driver core: platform: Add an error message to platform_get_irq*()"
Cc: <stable@...r.kernel.org> # 5.4.x
Signed-off-by: Hans de Goede <hdegoede@...hat.com>
Reviewed-by: Jerry Snitselaar <jsnitsel@...hat.com>
Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/char/tpm/tpm_tis.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/char/tpm/tpm_tis.c
+++ b/drivers/char/tpm/tpm_tis.c
@@ -286,7 +286,7 @@ static int tpm_tis_plat_probe(struct pla
 	}
 	tpm_info.res = *res;
 
-	tpm_info.irq = platform_get_irq(pdev, 0);
+	tpm_info.irq = platform_get_irq_optional(pdev, 0);
 	if (tpm_info.irq <= 0) {
 		if (pdev != force_pdev)
 			tpm_info.irq = -1;