Thread (28 messages) 28 messages, 3 authors, 2018-01-12
STALE3092d REVIEWED: 2 (0M)
Revisions (2)
  1. v1 [diff vs current]
  2. v2 current

[PATCH v2 6/7] PCI: aardvark: fix PCIe max read request size setting

From: Thomas Petazzoni <hidden>
Date: 2017-09-28 12:58:37
Also in: linux-pci
Subsystem: pci subsystem, the rest · Maintainers: Bjorn Helgaas, Linus Torvalds

From: Evan Wang <redacted>

There is an obvious typo issue in the definition of the PCIe maximum
read request size: a bit shift is directly used as a value, while it
should be used to shift the correct value.

This is part of fixing bug
https://bugzilla.kernel.org/show_bug.cgi?id=196339, this commit was
reported as the user to be important to get a Intel 7260 mini-PCIe
WiFi card working.

Fixes: 8c39d710363c1 ("PCI: aardvark: Add Aardvark PCI host controller driver")
Signed-off-by: Evan Wang <redacted>
Reviewed-by: Victor Gu <redacted>
Reviewed-by: Nadav Haklai <redacted>
[Thomas: tweak commit log.]
Signed-off-by: Thomas Petazzoni <redacted>
---
 drivers/pci/host/pci-aardvark.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/pci/host/pci-aardvark.c b/drivers/pci/host/pci-aardvark.c
index a173f31853df..c1093b023e48 100644
--- a/drivers/pci/host/pci-aardvark.c
+++ b/drivers/pci/host/pci-aardvark.c
@@ -33,6 +33,7 @@
 #define     PCIE_CORE_DEV_CTRL_STATS_MAX_PAYLOAD_SZ		0x2
 #define     PCIE_CORE_DEV_CTRL_STATS_SNOOP_DISABLE		(0 << 11)
 #define     PCIE_CORE_DEV_CTRL_STATS_MAX_RD_REQ_SIZE_SHIFT	12
+#define     PCIE_CORE_DEV_CTRL_STATS_MAX_RD_REQ_SZ		0x2
 #define     PCIE_CORE_MPS_UNIT_BYTE				128
 #define PCIE_CORE_LINK_CTRL_STAT_REG				0xd0
 #define     PCIE_CORE_LINK_L0S_ENTRY				BIT(0)
@@ -303,7 +304,8 @@ static void advk_pcie_setup_hw(struct advk_pcie *pcie)
 		(PCIE_CORE_DEV_CTRL_STATS_MAX_PAYLOAD_SZ <<
 		 PCIE_CORE_DEV_CTRL_STATS_MAX_PAYLOAD_SZ_SHIFT) |
 		PCIE_CORE_DEV_CTRL_STATS_SNOOP_DISABLE |
-		PCIE_CORE_DEV_CTRL_STATS_MAX_RD_REQ_SIZE_SHIFT;
+		(PCIE_CORE_DEV_CTRL_STATS_MAX_RD_REQ_SZ <<
+		 PCIE_CORE_DEV_CTRL_STATS_MAX_RD_REQ_SIZE_SHIFT);
 	advk_writel(pcie, reg, PCIE_CORE_DEV_CTRL_STATS_REG);
 
 	/* Program PCIe Control 2 to disable strict ordering */
-- 
2.13.5
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