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Message-Id: <20200724132930.7206-1-pali@kernel.org>
Date: Fri, 24 Jul 2020 15:29:30 +0200
From: Pali Rohár <pali@...nel.org>
To: Jason Cooper <jason@...edaemon.net>,
Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
Rob Herring <robh@...nel.org>,
Bjorn Helgaas <bhelgaas@...gle.com>
Cc: linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] PCI: mvebu: Check if reset gpio is defined
Reset gpio is optional and it does not have to be defined for all boards.
So in mvebu_pcie_powerdown() like in mvebu_pcie_powerup() check that reset
gpio is defined prior usage to prevent NULL pointer dereference.
Signed-off-by: Pali Rohár <pali@...nel.org>
---
drivers/pci/controller/pci-mvebu.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/pci/controller/pci-mvebu.c b/drivers/pci/controller/pci-mvebu.c
index 153a64676bc9..58607cbe84c8 100644
--- a/drivers/pci/controller/pci-mvebu.c
+++ b/drivers/pci/controller/pci-mvebu.c
@@ -947,7 +947,8 @@ static int mvebu_pcie_powerup(struct mvebu_pcie_port *port)
*/
static void mvebu_pcie_powerdown(struct mvebu_pcie_port *port)
{
- gpiod_set_value_cansleep(port->reset_gpio, 1);
+ if (port->reset_gpio)
+ gpiod_set_value_cansleep(port->reset_gpio, 1);
clk_disable_unprepare(port->clk);
}
--
2.20.1
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