linux-kernel - [PATCH v4 2/9] gpio-exar/8250-exar: Do not even instantiate a GPIO device for Commtech cards

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <f7e7da1ae81aab7f53faa32260d4ee0f930048fe.1496127684.git.jan.kiszka@siemens.com>
Date:   Tue, 30 May 2017 09:01:17 +0200
From:   Jan Kiszka <jan.kiszka@...mens.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        Alexandre Courbot <gnurou@...il.com>
Cc:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-serial@...r.kernel.org, linux-gpio@...r.kernel.org,
        Sudip Mukherjee <sudip.mukherjee@...ethink.co.uk>,
        Andy Shevchenko <andy.shevchenko@...il.com>,
        Sascha Weisenberger <sascha.weisenberger@...mens.com>
Subject: [PATCH v4 2/9] gpio-exar/8250-exar: Do not even instantiate a GPIO device for Commtech cards

Commtech adapters need the MPIOs for internal purposes, and the
gpio-exar driver already refused to pick them up. But there is actually
no point in even creating the underlying platform device.

Signed-off-by: Jan Kiszka <jan.kiszka@...mens.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@...il.com>
Acked-by: Linus Walleij <linus.walleij@...aro.org>
---
 drivers/gpio/gpio-exar.c            | 3 ---
 drivers/tty/serial/8250/8250_exar.c | 4 +++-
 2 files changed, 3 insertions(+), 4 deletions(-)

diff --git a/drivers/gpio/gpio-exar.c b/drivers/gpio/gpio-exar.c
index 081076771217..006a9a67c2a4 100644
--- a/drivers/gpio/gpio-exar.c
+++ b/drivers/gpio/gpio-exar.c
@@ -124,9 +124,6 @@ static int gpio_exar_probe(struct platform_device *pdev)
 	void __iomem *p;
 	int index, ret;
 
-	if (pcidev->vendor != PCI_VENDOR_ID_EXAR)
-		return -ENODEV;
-
 	/*
 	 * Map the pci device to get the register addresses.
 	 * We will need to read and write those registers to control
diff --git a/drivers/tty/serial/8250/8250_exar.c b/drivers/tty/serial/8250/8250_exar.c
index 8984e8b2d524..c29c7e675890 100644
--- a/drivers/tty/serial/8250/8250_exar.c
+++ b/drivers/tty/serial/8250/8250_exar.c
@@ -245,7 +245,9 @@ pci_xr17v35x_setup(struct exar8250 *priv, struct pci_dev *pcidev,
 		/* Setup Multipurpose Input/Output pins. */
 		setup_gpio(pcidev, p);
 
-		port->port.private_data = xr17v35x_register_gpio(pcidev);
+		if (pcidev->vendor == PCI_VENDOR_ID_EXAR)
+			port->port.private_data =
+				xr17v35x_register_gpio(pcidev);
 	}
 
 	return 0;
-- 
2.12.3