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| author | Victor Gu <xigu@marvell.com> | 2018-04-06 16:55:31 +0200 |
|---|---|---|
| committer | Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> | 2018-04-16 12:21:00 +0200 |
| commit | 660661afcd40ed7f515ef3369721ed58e80c0fc5 (patch) | |
| tree | 9a9b1276624a211f30039356fedfc01dccfb082c | |
| parent | Linux 4.17-rc1 (diff) | |
| download | linux-660661afcd40ed7f515ef3369721ed58e80c0fc5.tar.xz linux-660661afcd40ed7f515ef3369721ed58e80c0fc5.zip | |
PCI: aardvark: Fix logic in advk_pcie_{rd,wr}_conf()
The PCI configuration space read/write functions were special casing
the situation where PCI_SLOT(devfn) != 0, and returned
PCIBIOS_DEVICE_NOT_FOUND in this case.
However, while this is what is intended for the root bus, it is not
intended for the child busses, as it prevents discovering devices with
PCI_SLOT(x) != 0. Therefore, we return PCIBIOS_DEVICE_NOT_FOUND only
if we're on the root bus.
Fixes: 8c39d710363c1 ("PCI: aardvark: Add Aardvark PCI host controller driver")
Cc: <stable@vger.kernel.org>
Signed-off-by: Victor Gu <xigu@marvell.com>
Reviewed-by: Wilson Ding <dingwei@marvell.com>
Reviewed-by: Nadav Haklai <nadavh@marvell.com>
[Thomas: tweak commit log.]
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
| -rw-r--r-- | drivers/pci/host/pci-aardvark.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/pci/host/pci-aardvark.c b/drivers/pci/host/pci-aardvark.c index b04d37b3c5de..b72f15c99793 100644 --- a/drivers/pci/host/pci-aardvark.c +++ b/drivers/pci/host/pci-aardvark.c @@ -437,7 +437,7 @@ static int advk_pcie_rd_conf(struct pci_bus *bus, u32 devfn, u32 reg; int ret; - if (PCI_SLOT(devfn) != 0) { + if ((bus->number == pcie->root_bus_nr) && PCI_SLOT(devfn) != 0) { *val = 0xffffffff; return PCIBIOS_DEVICE_NOT_FOUND; } @@ -491,7 +491,7 @@ static int advk_pcie_wr_conf(struct pci_bus *bus, u32 devfn, int offset; int ret; - if (PCI_SLOT(devfn) != 0) + if ((bus->number == pcie->root_bus_nr) && PCI_SLOT(devfn) != 0) return PCIBIOS_DEVICE_NOT_FOUND; if (where % size) |