diff options
| author | Victor Gu <xigu@marvell.com> | 2018-04-06 17:55:31 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-05-01 22:58:20 +0300 |
| commit | e90b89088a109f1c49befd8a7f9f7d970d093e62 (patch) | |
| tree | 00b89e2273f86a9233c9e267b22286d574740cac /drivers/pci | |
| parent | fd0485e2cc7b5f69889dca223b2c9f7cba6e91f4 (diff) | |
| download | linux-e90b89088a109f1c49befd8a7f9f7d970d093e62.tar.xz | |
PCI: aardvark: Fix logic in advk_pcie_{rd,wr}_conf()
commit 660661afcd40ed7f515ef3369721ed58e80c0fc5 upstream.
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/pci')
| -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 26ed0c08f209..3e7d1e22d33e 100644 --- a/drivers/pci/host/pci-aardvark.c +++ b/drivers/pci/host/pci-aardvark.c @@ -440,7 +440,7 @@ 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; } @@ -494,7 +494,7 @@ 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) |