From: Kishon Vijay Abraham I <kishon@ti.com>
To: Alan Mikhak <alan.mikhak@sifive.com>, <linux-pci@vger.kernel.org>,
<linux-kernel@vger.kernel.org>, <lorenzo.pieralisi@arm.com>,
<linux-riscv@lists.infradead.org>,
Palmer Dabbelt <palmer@sifive.com>,
Paul Walmsley <paul.walmsley@sifive.com>,
Bjorn Helgaas <bhelgaas@google.com>
Subject: Re: [PATCH v2] PCI: endpoint: Set endpoint controller pointer to null
Date: Fri, 24 May 2019 14:11:33 +0530 [thread overview]
Message-ID: <0e4cfe24-adf6-8966-9f58-69f7aba7a6fa@ti.com> (raw)
In-Reply-To: <CABEDWGyb3zTaiRqt7-mvrS6Dvhu0Fkhjp4nvaJ-vaJrD3n=0_Q@mail.gmail.com>
On 24/05/19 5:27 AM, Alan Mikhak wrote:
> +Bjorn Helgaas
>
> On Thu, May 23, 2019 at 2:46 PM Alan Mikhak <alan.mikhak@sifive.com> wrote:
>>
>> 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>
Acked-by: Kishon Vijay Abraham I <kishon@ti.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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next prev parent reply other threads:[~2019-05-24 8:43 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-05-23 21:45 [PATCH v2] PCI: endpoint: Set endpoint controller pointer to null Alan Mikhak
2019-05-23 23:57 ` Alan Mikhak
2019-05-24 8:41 ` Kishon Vijay Abraham I [this message]
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
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