From: Sinan Kaya <okaya@codeaurora.org>
To: linux-pci@vger.kernel.org, timur@codeaurora.org
Cc: Sinan Kaya <okaya@codeaurora.org>,
linux-arm-msm@vger.kernel.org,
Bjorn Helgaas <bhelgaas@google.com>,
open list <linux-kernel@vger.kernel.org>,
linux-arm-kernel@lists.infradead.org
Subject: [PATCH V2 4/7] PCI: wait device ready after pci_pm_reset()
Date: Mon, 27 Nov 2017 01:20:25 -0500 [thread overview]
Message-ID: <1511763628-11856-5-git-send-email-okaya@codeaurora.org> (raw)
In-Reply-To: <1511763628-11856-1-git-send-email-okaya@codeaurora.org>
Rev 3.1 Sec 2.3.1 Request Handling Rules says a device can issue CRS
following a D3hot->D0 transition. Add pci_dev_wait() call to see if
device is available before returning.
Signed-off-by: Sinan Kaya <okaya@codeaurora.org>
---
drivers/pci/pci.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index ed3c3bc..87e4688 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -3990,7 +3990,7 @@ static int pci_pm_reset(struct pci_dev *dev, int probe)
pci_write_config_word(dev, dev->pm_cap + PCI_PM_CTRL, csr);
pci_dev_d3_sleep(dev);
- return 0;
+ return pci_dev_wait(dev, "PM D3->D0", PCIE_RESET_READY_POLL_MS);
}
void pci_reset_secondary_bus(struct pci_dev *dev)
--
1.9.1
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next prev parent reply other threads:[~2017-11-27 6:20 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-11-27 6:20 [PATCH V2 0/7] PCI: handle CRS response following Hot Reset and D3hot->D0 Sinan Kaya
2017-11-27 6:20 ` [PATCH V2 1/7] PCI: protect restore with device lock to be consistent Sinan Kaya
2017-11-29 17:36 ` Christoph Hellwig
2017-11-27 6:20 ` [PATCH V2 2/7] PCI: handle FLR failure and allow other reset types Sinan Kaya
2017-11-29 17:36 ` Christoph Hellwig
2017-11-27 6:20 ` [PATCH V2 3/7] PCI: make pci_flr_wait() generic and rename to pci_dev_wait() Sinan Kaya
2017-11-29 17:38 ` Christoph Hellwig
2017-12-04 13:17 ` Sinan Kaya
2017-12-13 22:43 ` Bjorn Helgaas
2018-01-02 15:47 ` Sinan Kaya
2017-11-27 6:20 ` Sinan Kaya [this message]
2017-11-29 17:38 ` [PATCH V2 4/7] PCI: wait device ready after pci_pm_reset() Christoph Hellwig
2017-11-27 6:20 ` [PATCH V2 5/7] PCI: add a return type for pci_reset_bridge_secondary_bus() Sinan Kaya
2017-11-29 17:38 ` Christoph Hellwig
2017-11-27 6:20 ` [PATCH V2 6/7] PCI: add device wait after slot and bus reset Sinan Kaya
2017-11-29 17:39 ` Christoph Hellwig
2017-11-27 6:20 ` [PATCH V2 7/7] PCI: make reset poll time adjustable Sinan Kaya
2017-11-28 14:20 ` Bjorn Helgaas
2017-11-28 14:26 ` Sinan Kaya
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