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From: Alan Mikhak <alan.mikhak@sifive.com>
To: linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org,
	kishon@ti.com, lorenzo.pieralisi@arm.com,
	linux-riscv@lists.infradead.org, palmer@sifive.com,
	paul.walmsley@sifive.com
Cc: Alan Mikhak <alan.mikhak@sifive.com>
Subject: [PATCH v2] PCI: endpoint: Set endpoint controller pointer to null
Date: Thu, 23 May 2019 14:45:44 -0700	[thread overview]
Message-ID: <1558647944-13816-1-git-send-email-alan.mikhak@sifive.com> (raw)

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


WARNING: multiple messages have this Message-ID (diff)
From: Alan Mikhak <alan.mikhak@sifive.com>
To: linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org,
	kishon@ti.com, lorenzo.pieralisi@arm.com,
	linux-riscv@lists.infradead.org, palmer@sifive.com,
	paul.walmsley@sifive.com
Cc: Alan Mikhak <alan.mikhak@sifive.com>
Subject: [PATCH v2] PCI: endpoint: Set endpoint controller pointer to null
Date: Thu, 23 May 2019 14:45:44 -0700	[thread overview]
Message-ID: <1558647944-13816-1-git-send-email-alan.mikhak@sifive.com> (raw)

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


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             reply	other threads:[~2019-05-23 21:46 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-05-23 21:45 Alan Mikhak [this message]
2019-05-23 21:45 ` [PATCH v2] PCI: endpoint: Set endpoint controller pointer to null 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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