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Sun, 24 Sep 2017 00:17:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1506212230; bh=Rv6+OCsiTHMXuiB2B+6hgIpAWmjL+k++gMwjdqBDXkc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=RDN7xCogjiW5ahDF8u4pDA98BAcHMo2rybmC4sGoLonUMftEyQnL1H7caxQzT1r2b 5NsX/yn8IckVEYhSJ9SdpAhkBMVWnQzv6QNtKSjgWiCupKUqiJeMW3FAW+F5P1u5QS 95/fxXrFFlKJT9UnQXqyfP3cIMQa7LpQwqmRKBEE= DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 63AB360738 Authentication-Results: pdx-caf-mail.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: pdx-caf-mail.web.codeaurora.org; spf=none smtp.mailfrom=okaya@codeaurora.org From: Sinan Kaya To: linux-pci@vger.kernel.org, timur@codeaurora.org, alex.williamson@redhat.com Subject: [PATCH 4/5] PCI: wait device ready after pci_pm_reset() Date: Sat, 23 Sep 2017 20:16:57 -0400 Message-Id: <1506212218-29103-4-git-send-email-okaya@codeaurora.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1506212218-29103-1-git-send-email-okaya@codeaurora.org> References: <1506212218-29103-1-git-send-email-okaya@codeaurora.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20170923_171728_703318_FC261191 X-CRM114-Status: GOOD ( 11.40 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Sinan Kaya , linux-arm-msm@vger.kernel.org, Bjorn Helgaas , linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP 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 with 1 second timeout to see if device is available before returning. Signed-off-by: Sinan Kaya --- drivers/pci/pci.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index fd4a3b6..074adf9 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -3963,6 +3963,7 @@ static int pci_af_flr(struct pci_dev *dev, int probe) */ static int pci_pm_reset(struct pci_dev *dev, int probe) { + unsigned int delay = dev->d3_delay; u16 csr; if (!dev->pm_cap || dev->dev_flags & PCI_DEV_FLAGS_NO_PM_RESET) @@ -3988,7 +3989,10 @@ 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; + if (delay < pci_pm_d3_delay) + delay = pci_pm_d3_delay; + + return pci_dev_wait(dev, "PM D3->D0", delay, 1000); } void pci_reset_secondary_bus(struct pci_dev *dev)