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| author | Pali Rohár <pali@kernel.org> | 2021-10-05 20:09:41 +0200 |
|---|---|---|
| committer | Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> | 2021-10-07 15:23:31 +0200 |
| commit | a4e17d65dafdd3513042d8f00404c9b6068a825c (patch) | |
| tree | 24d92764f542877f105978d26e5c9e97ace4793e /drivers/pci/controller/pci-aardvark.c | |
| parent | PCI: Add PCI_EXP_DEVCTL_PAYLOAD_* macros (diff) | |
| download | linux-a4e17d65dafdd3513042d8f00404c9b6068a825c.tar.xz linux-a4e17d65dafdd3513042d8f00404c9b6068a825c.zip | |
PCI: aardvark: Fix PCIe Max Payload Size setting
Change PCIe Max Payload Size setting in PCIe Device Control register to 512
bytes to align with PCIe Link Initialization sequence as defined in Marvell
Armada 3700 Functional Specification. According to the specification,
maximal Max Payload Size supported by this device is 512 bytes.
Without this kernel prints suspicious line:
pci 0000:01:00.0: Upstream bridge's Max Payload Size set to 256 (was 16384, max 512)
With this change it changes to:
pci 0000:01:00.0: Upstream bridge's Max Payload Size set to 256 (was 512, max 512)
Link: https://lore.kernel.org/r/20211005180952.6812-3-kabel@kernel.org
Fixes: 8c39d710363c ("PCI: aardvark: Add Aardvark PCI host controller driver")
Signed-off-by: Pali Rohár <pali@kernel.org>
Signed-off-by: Marek Behún <kabel@kernel.org>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Marek Behún <kabel@kernel.org>
Cc: stable@vger.kernel.org
Diffstat (limited to 'drivers/pci/controller/pci-aardvark.c')
| -rw-r--r-- | drivers/pci/controller/pci-aardvark.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/pci/controller/pci-aardvark.c b/drivers/pci/controller/pci-aardvark.c index 596ebcfcc82d..884510630bae 100644 --- a/drivers/pci/controller/pci-aardvark.c +++ b/drivers/pci/controller/pci-aardvark.c @@ -488,8 +488,9 @@ static void advk_pcie_setup_hw(struct advk_pcie *pcie) reg = advk_readl(pcie, PCIE_CORE_PCIEXP_CAP + PCI_EXP_DEVCTL); reg &= ~PCI_EXP_DEVCTL_RELAX_EN; reg &= ~PCI_EXP_DEVCTL_NOSNOOP_EN; + reg &= ~PCI_EXP_DEVCTL_PAYLOAD; reg &= ~PCI_EXP_DEVCTL_READRQ; - reg |= PCI_EXP_DEVCTL_PAYLOAD; /* Set max payload size */ + reg |= PCI_EXP_DEVCTL_PAYLOAD_512B; reg |= PCI_EXP_DEVCTL_READRQ_512B; advk_writel(pcie, reg, PCIE_CORE_PCIEXP_CAP + PCI_EXP_DEVCTL); |