The functions link_state_store, 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.
Signed-off-by: Chris J Arges <chris.j.arges@xxxxxxxxxxxxx>
---
drivers/pci/pcie/aspm.c | 12 +++++++-----
1 file changed, 7 insertions(+), 5 deletions(-)
diff --git a/drivers/pci/pcie/aspm.c b/drivers/pci/pcie/aspm.c
index e1e7026..48e1714 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 state = 0;
+ u32 val;
+
+ kstrtouint(buf, 10, &val);
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);
--
1.9.1
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