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authorDavid S. Miller <davem@davemloft.net>2011-05-23 17:12:22 -0700
committerJesse Barnes <jbarnes@virtuousgeek.org>2011-05-31 14:29:26 -0700
commit5aceca9d3cbdacbd017712513387d930f9f944d9 (patch)
tree026fbf89f4f5e077d865561b631bcc5210f32871 /drivers/pci
parentaf0d6a0a3a30946f7df69c764791f1b0643f7cd6 (diff)
PCI: Fix warning in drivers/pci/probe.c on sparc64
IO_SPACE_LIMIT is currently used in two ways: 1) As a way to mask I/O port values read out of PCI base address registers. This value should be 64-bit. 2) As a value which is the upper limit for all I/O "ports" in the system. On sparc64 we store the full 64-bit physical I/O address in the resources. For this reason we define IO_SPACE_LIMIT at a 64-bit "all 1's". This is the right value to use for ioport_resource.end and for the check made in drivers/pcmcia/rsrc_nonstatic.c:adjust_io(). But in driver/pci/probe.c:__pci_read_base() we mask this against a "u32" variable and thus get the following warning: drivers/pci/probe.c: In function ¡__pci_read_base¢: drivers/pci/probe.c:207: warning: large integer implicitly truncated to unsigned type Fix this by using an explicit "u32" cast. I considered changing sparc64 to define a 32-bit "all 1's" like most other systems do, but this wouldn't work because the checks in PCMCIA's rsrc_nonstatic.c would no longer be right since they are testing against fully formed 64-bit resources. As described above, on sparc64 such resources will hold full 64-bit physical I/O addresses, not bus-centric 32-bit ones. Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Diffstat (limited to 'drivers/pci')
-rw-r--r--drivers/pci/probe.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index 48849ffdd672..bafb3c3d4a89 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -168,7 +168,7 @@ int __pci_read_base(struct pci_dev *dev, enum pci_bar_type type,
res->flags |= pci_calc_resource_flags(l) | IORESOURCE_SIZEALIGN;
if (type == pci_bar_io) {
l &= PCI_BASE_ADDRESS_IO_MASK;
- mask = PCI_BASE_ADDRESS_IO_MASK & IO_SPACE_LIMIT;
+ mask = PCI_BASE_ADDRESS_IO_MASK & (u32) IO_SPACE_LIMIT;
} else {
l &= PCI_BASE_ADDRESS_MEM_MASK;
mask = (u32)PCI_BASE_ADDRESS_MEM_MASK;