linux-pci.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
* [PATCH v1] PCI: brcmstb: variable is missing proper initialization
@ 2020-11-02 20:57 Jim Quinlan
  2020-11-02 21:07 ` Florian Fainelli
                   ` (2 more replies)
  0 siblings, 3 replies; 7+ messages in thread
From: Jim Quinlan @ 2020-11-02 20:57 UTC (permalink / raw)
  To: linux-pci, bcm-kernel-feedback-list, james.quinlan,
	Rafał Miłecki
  Cc: Nicolas Saenz Julienne, Lorenzo Pieralisi, Rob Herring,
	Bjorn Helgaas, Florian Fainelli, Andrew Murray, Jeremy Linton,
	moderated list:BROADCOM BCM2711/BCM2835 ARM ARCHITECTURE,
	moderated list:BROADCOM BCM2711/BCM2835 ARM ARCHITECTURE,
	open list

[-- Attachment #1: Type: text/plain, Size: 1199 bytes --]

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


[-- Attachment #2: S/MIME Cryptographic Signature --]
[-- Type: application/pkcs7-signature, Size: 4167 bytes --]

^ permalink raw reply	[flat|nested] 7+ messages in thread

end of thread, other threads:[~2020-11-20 17:07 UTC | newest]

Thread overview: 7+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2020-11-02 20:57 [PATCH v1] PCI: brcmstb: variable is missing proper initialization Jim Quinlan
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

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).