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PCI: avoid save the same type of cap multiple times

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Avoid adding the same type of cap multiple times, otherwise we will see dead loop.

Signed-off-by: Shaohua Li <shaohua.li@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Shaohua Li 2007-12-18 09:57:09 +08:00 committed by Greg Kroah-Hartman
parent ec0a3a27fb
commit 017fc480cc
1 changed files with 10 additions and 2 deletions
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12
drivers/pci/pci.c
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@ -569,6 +569,7 @@ static int pci_save_pcie_state(struct pci_dev *dev)
int pos, i = 0;
struct pci_cap_saved_state *save_state;
u16 *cap;
int found = 0;
pos = pci_find_capability(dev, PCI_CAP_ID_EXP);
if (pos <= 0)
@ -577,6 +578,8 @@ static int pci_save_pcie_state(struct pci_dev *dev)
save_state = pci_find_saved_cap(dev, PCI_CAP_ID_EXP);
if (!save_state)
save_state = kzalloc(sizeof(*save_state) + sizeof(u16) * 4, GFP_KERNEL);
else
found = 1;
if (!save_state) {
dev_err(&dev->dev, "Out of memory in pci_save_pcie_state\n");
return -ENOMEM;
@ -588,7 +591,8 @@ static int pci_save_pcie_state(struct pci_dev *dev)
pci_read_config_word(dev, pos + PCI_EXP_SLTCTL, &cap[i++]);
pci_read_config_word(dev, pos + PCI_EXP_RTCTL, &cap[i++]);
save_state->cap_nr = PCI_CAP_ID_EXP;
pci_add_saved_cap(dev, save_state);
if (!found)
pci_add_saved_cap(dev, save_state);
return 0;
}
@ -616,6 +620,7 @@ static int pci_save_pcix_state(struct pci_dev *dev)
int pos, i = 0;
struct pci_cap_saved_state *save_state;
u16 *cap;
int found = 0;
pos = pci_find_capability(dev, PCI_CAP_ID_PCIX);
if (pos <= 0)
@ -624,6 +629,8 @@ static int pci_save_pcix_state(struct pci_dev *dev)
save_state = pci_find_saved_cap(dev, PCI_CAP_ID_PCIX);
if (!save_state)
save_state = kzalloc(sizeof(*save_state) + sizeof(u16), GFP_KERNEL);
else
found = 1;
if (!save_state) {
dev_err(&dev->dev, "Out of memory in pci_save_pcie_state\n");
return -ENOMEM;
@ -632,7 +639,8 @@ static int pci_save_pcix_state(struct pci_dev *dev)
pci_read_config_word(dev, pos + PCI_X_CMD, &cap[i++]);
save_state->cap_nr = PCI_CAP_ID_PCIX;
pci_add_saved_cap(dev, save_state);
if (!found)
pci_add_saved_cap(dev, save_state);
return 0;
}