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| author |   Chris J Arges <chris.j.arges@canonical.com> | 2014-12-05 17:02:42 -0600 |
|---|---|---|
| committer |   Bjorn Helgaas <bhelgaas@google.com> | 2015-01-09 10:55:16 -0700 |
| commit | 94a90312e4ef1b03469086d41fedfa55e67a1532 (patch) | |
| tree | e115eae3c5c4cdad5eda0e324259a9a28d323320 /drivers/pci | |
| parent | Linux 3.19-rc1 (diff) | |
| download | linux-dev-94a90312e4ef1b03469086d41fedfa55e67a1532.tar.xz linux-dev-94a90312e4ef1b03469086d41fedfa55e67a1532.zip | |
PCI/ASPM: Use standard parsing functions for sysfs setters
The functions link_state_store() and clk_ctl_store() had just subtracted
ASCII '0' from input which could lead to undesired results. Instead, use
Linux string functions to safely parse input.
[bhelgaas: check kstrtouint() return value]
Signed-off-by: Chris J Arges <chris.j.arges@canonical.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Diffstat (limited to 'drivers/pci')
| -rw-r--r-- | drivers/pci/pcie/aspm.c | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/drivers/pci/pcie/aspm.c b/drivers/pci/pcie/aspm.c index e1e7026b838d..820740a22e94 100644 --- a/drivers/pci/pcie/aspm.c +++ b/drivers/pci/pcie/aspm.c @@ -859,7 +859,10 @@ static ssize_t link_state_store(struct device *dev, { struct pci_dev *pdev = to_pci_dev(dev); struct pcie_link_state *link, *root = pdev->link_state->root; - u32 val = buf[0] - '0', state = 0; + u32 val, state = 0; + + if (kstrtouint(buf, 10, &val)) + return -EINVAL; if (aspm_disabled) return -EPERM; @@ -900,15 +903,14 @@ static ssize_t clk_ctl_store(struct device *dev, size_t n) { struct pci_dev *pdev = to_pci_dev(dev); - int state; + bool state; - if (n < 1) + if (strtobool(buf, &state)) return -EINVAL; - state = buf[0]-'0'; down_read(&pci_bus_sem); mutex_lock(&aspm_lock); - pcie_set_clkpm_nocheck(pdev->link_state, !!state); + pcie_set_clkpm_nocheck(pdev->link_state, state); mutex_unlock(&aspm_lock); up_read(&pci_bus_sem); |