forked from luck/tmp_suning_uos_patched
PCI/MSI: Check for NULL affinity mask in pci_irq_get_affinity()
If msi_setup_entry() fails to allocate an affinity mask, it logs a message
but continues on and allocates an MSI entry with entry->affinity == NULL.
Check for this case in pci_irq_get_affinity() so we don't try to
dereference a NULL pointer.
[bhelgaas: changelog]
Fixes: ee8d41e53e
"pci/msi: Retrieve affinity for a vector"
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
CC: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
parent
1001354ca3
commit
d1d111e073
@ -1292,7 +1292,8 @@ const struct cpumask *pci_irq_get_affinity(struct pci_dev *dev, int nr)
|
|||||||
} else if (dev->msi_enabled) {
|
} else if (dev->msi_enabled) {
|
||||||
struct msi_desc *entry = first_pci_msi_entry(dev);
|
struct msi_desc *entry = first_pci_msi_entry(dev);
|
||||||
|
|
||||||
if (WARN_ON_ONCE(!entry || nr >= entry->nvec_used))
|
if (WARN_ON_ONCE(!entry || !entry->affinity ||
|
||||||
|
nr >= entry->nvec_used))
|
||||||
return NULL;
|
return NULL;
|
||||||
|
|
||||||
return &entry->affinity[nr];
|
return &entry->affinity[nr];
|
||||||
|
Loading…
Reference in New Issue
Block a user