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| author | Bjorn Helgaas <bhelgaas@google.com> | 2014-04-25 21:01:08 +0400 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2014-04-25 21:01:08 +0400 |
| commit | 0b2d70764bb39242dcc49c0ebd10fcb8258ce5fa (patch) | |
| tree | bf37d69370a9789abf725e022e2c5c39b40c4a3b /arch/x86/pci/broadcom_bus.c | |
| parent | c9eaa447e77efe77b7fa4c953bd62de8297fd6c5 (diff) | |
| download | linux-0b2d70764bb39242dcc49c0ebd10fcb8258ce5fa.tar.xz | |
x86/PCI: Fix Broadcom CNB20LE unintended sign extension
In the expression "word1 << 16", word1 starts as u16, but is promoted to
a signed int, then sign-extended to resource_size_t, which is probably
not what was intended. Cast to resource_size_t to avoid the sign
extension.
Found by Coverity (CID 138749, 138750).
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Diffstat (limited to 'arch/x86/pci/broadcom_bus.c')
| -rw-r--r-- | arch/x86/pci/broadcom_bus.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/x86/pci/broadcom_bus.c b/arch/x86/pci/broadcom_bus.c index 614392ced7d6..bb461cfd01ab 100644 --- a/arch/x86/pci/broadcom_bus.c +++ b/arch/x86/pci/broadcom_bus.c @@ -60,8 +60,8 @@ static void __init cnb20le_res(u8 bus, u8 slot, u8 func) word1 = read_pci_config_16(bus, slot, func, 0xc4); word2 = read_pci_config_16(bus, slot, func, 0xc6); if (word1 != word2) { - res.start = (word1 << 16) | 0x0000; - res.end = (word2 << 16) | 0xffff; + res.start = ((resource_size_t) word1 << 16) | 0x0000; + res.end = ((resource_size_t) word2 << 16) | 0xffff; res.flags = IORESOURCE_MEM | IORESOURCE_PREFETCH; update_res(info, res.start, res.end, res.flags, 0); } |