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From: Jim Quinlan <james.quinlan@broadcom.com>
To: linux-pci@vger.kernel.org, bcm-kernel-feedback-list@broadcom.com,
	james.quinlan@broadcom.com, "Rafał Miłecki" <zajec5@gmail.com>
Cc: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>,
	Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
	Rob Herring <robh@kernel.org>,
	Bjorn Helgaas <bhelgaas@google.com>,
	Florian Fainelli <f.fainelli@gmail.com>,
	Andrew Murray <amurray@thegoodpenguin.co.uk>,
	Jeremy Linton <jeremy.linton@arm.com>,
	linux-rpi-kernel@lists.infradead.org (moderated list:BROADCOM
	BCM2711/BCM2835 ARM ARCHITECTURE),
	linux-arm-kernel@lists.infradead.org (moderated list:BROADCOM
	BCM2711/BCM2835 ARM ARCHITECTURE),
	linux-kernel@vger.kernel.org (open list)
Subject: [PATCH v1] PCI: brcmstb: variable is missing proper initialization
Date: Mon,  2 Nov 2020 15:57:12 -0500	[thread overview]
Message-ID: <20201102205712.23332-1-james.quinlan@broadcom.com> (raw)

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The variable 'tmp' is used multiple times in the brcm_pcie_setup()
function.  One such usage did not initialize 'tmp' to the current value of
the target register.  By luck the mistake does not currently affect
behavior;  regardless 'tmp' is now initialized properly.

Fixes: c0452137034b ("PCI: brcmstb: Add Broadcom STB PCIe host controller driver")
Suggested-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: Jim Quinlan <james.quinlan@broadcom.com>
---
 drivers/pci/controller/pcie-brcmstb.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/pci/controller/pcie-brcmstb.c b/drivers/pci/controller/pcie-brcmstb.c
index bea86899bd5d..9c3d2982248d 100644
--- a/drivers/pci/controller/pcie-brcmstb.c
+++ b/drivers/pci/controller/pcie-brcmstb.c
@@ -893,6 +893,7 @@ static int brcm_pcie_setup(struct brcm_pcie *pcie)
 		burst = 0x2; /* 512 bytes */
 
 	/* Set SCB_MAX_BURST_SIZE, CFG_READ_UR_MODE, SCB_ACCESS_EN */
+	tmp = readl(base + PCIE_MISC_MISC_CTRL);
 	u32p_replace_bits(&tmp, 1, PCIE_MISC_MISC_CTRL_SCB_ACCESS_EN_MASK);
 	u32p_replace_bits(&tmp, 1, PCIE_MISC_MISC_CTRL_CFG_READ_UR_MODE_MASK);
 	u32p_replace_bits(&tmp, burst, PCIE_MISC_MISC_CTRL_MAX_BURST_SIZE_MASK);
-- 
2.17.1


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             reply	other threads:[~2020-11-02 20:58 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-11-02 20:57 Jim Quinlan [this message]
2020-11-02 21:07 ` Florian Fainelli
2020-11-03 17:32   ` Nicolas Saenz Julienne
2020-11-03 19:38 ` Bjorn Helgaas
2020-11-03 19:40   ` Nicolas Saenz Julienne
2020-11-04 14:48   ` Jim Quinlan
2020-11-20 17:07 ` Lorenzo Pieralisi

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