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* [PATCH v2] PCI: endpoint: Set endpoint controller pointer to null
@ 2019-05-23 21:45 ` Alan Mikhak
  0 siblings, 0 replies; 16+ messages in thread
From: Alan Mikhak @ 2019-05-23 21:45 UTC (permalink / raw)
  To: linux-pci, linux-kernel, kishon, lorenzo.pieralisi, linux-riscv,
	palmer, paul.walmsley
  Cc: Alan Mikhak

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

Requires checking for null endpoint function pointer.

Signed-off-by: Alan Mikhak <alan.mikhak@sifive.com>
---
 drivers/pci/endpoint/pci-epc-core.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/pci/endpoint/pci-epc-core.c b/drivers/pci/endpoint/pci-epc-core.c
index e4712a0f249c..2091508c1620 100644
--- a/drivers/pci/endpoint/pci-epc-core.c
+++ b/drivers/pci/endpoint/pci-epc-core.c
@@ -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);
-- 
2.7.4


^ permalink raw reply related	[flat|nested] 16+ messages in thread

end of thread, other threads:[~2019-06-11 10:08 UTC | newest]

Thread overview: 16+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2019-05-23 21:45 [PATCH v2] PCI: endpoint: Set endpoint controller pointer to null Alan Mikhak
2019-05-23 21:45 ` Alan Mikhak
2019-05-23 23:57 ` Alan Mikhak
2019-05-23 23:57   ` Alan Mikhak
2019-05-24  8:41   ` Kishon Vijay Abraham I
2019-05-24  8:41     ` Kishon Vijay Abraham I
2019-05-24  6:38 ` Christoph Hellwig
2019-05-24 18:23   ` Alan Mikhak
2019-05-25  8:23     ` Christoph Hellwig
2019-05-24 19:04   ` Paul Walmsley
2019-05-24 19:05     ` Alan Mikhak
2019-05-25  8:24       ` Christoph Hellwig
2019-05-28 16:20         ` Alan Mikhak
2019-05-30  2:24           ` Palmer Dabbelt
2019-06-11 10:07 ` Lorenzo Pieralisi
2019-06-11 10:07   ` Lorenzo Pieralisi

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