PCI: endpoint: Cast the page number to phys_addr_t
authorAlan Mikhak <alan.mikhak@sifive.com>
Wed, 9 Oct 2019 17:06:56 +0000 (10:06 -0700)
committerLorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Tue, 15 Oct 2019 14:47:54 +0000 (15:47 +0100)
commitdaee4f4e42c792997f4fee47dcdfa65dd720ec02
tree5bf93bf90681ed553446f5c0822fda695c9b3721
parent54ecb8f7028c5eb3d740bb82b0f1d90f2df63c5c
PCI: endpoint: Cast the page number to phys_addr_t

Modify pci_epc_mem_alloc_addr() to cast the variable 'pageno'
from type 'int' to 'phys_addr_t' before shifting left. This
cast is needed to avoid treating bit 31 of 'pageno' as the
sign bit which would otherwise get sign-extended to produce
a negative value. When added to the base address of PCI memory
space, the negative value would produce an invalid physical
address which falls before the start of the PCI memory space.

Signed-off-by: Alan Mikhak <alan.mikhak@sifive.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Acked-by: Kishon Vijay Abraham I <kishon@ti.com>
drivers/pci/endpoint/pci-epc-mem.c