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PCI: endpoint: Set endpoint controller pointer to NULL

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Set endpoint controller pointer to NULL in pci_epc_remove_epf()
to avoid -EBUSY on subsequent call to pci_epc_add_epf().

Add a check for NULL endpoint function pointer.

Signed-off-by: Alan Mikhak <alan.mikhak@sifive.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Acked-by: Kishon Vijay Abraham I <kishon@ti.com>
This commit is contained in:
Alan Mikhak 2019-05-23 14:45:44 -07:00 committed by Lorenzo Pieralisi
parent a188339ca5
commit db7a62482d
1 changed files with 2 additions and 1 deletions
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3
drivers/pci/endpoint/pci-epc-core.c
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@ -519,11 +519,12 @@ void pci_epc_remove_epf(struct pci_epc *epc, struct pci_epf *epf)
{
unsigned long flags;
if (!epc || IS_ERR(epc))
if (!epc || IS_ERR(epc) || !epf)
return;
spin_lock_irqsave(&epc->lock, flags);
list_del(&epf->list);
epf->epc = NULL;
spin_unlock_irqrestore(&epc->lock, flags);
}
EXPORT_SYMBOL_GPL(pci_epc_remove_epf);