From mboxrd@z Thu Jan 1 00:00:00 1970 From: Bjorn Helgaas Date: Wed, 13 Jan 2016 17:50:16 +0000 Subject: Re: [PATCH v3] PCI: hosts: mark pcie/pci (msi) irq cascade handler as IRQF_NO_THREAD Message-Id: <20160113175016.GB28453@localhost> List-Id: References: <1449775100-30877-1-git-send-email-grygorii.strashko@ti.com> <20160106221827.GD16231@localhost> <20160113133904.GD29964@linutronix.de> In-Reply-To: <20160113133904.GD29964@linutronix.de> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-arm-kernel@lists.infradead.org On Wed, Jan 13, 2016 at 02:39:04PM +0100, Sebastian Andrzej Siewior wrote: > * Bjorn Helgaas | 2016-01-06 16:18:27 [-0600]: > > >Hi Bjorn, > > >> diff --git a/drivers/pci/host/pci-dra7xx.c b/drivers/pci/host/pci-dra7xx.c > >> index 8c36880..0415192 100644 > >> --- a/drivers/pci/host/pci-dra7xx.c > >> +++ b/drivers/pci/host/pci-dra7xx.c > >> @@ -301,8 +301,19 @@ static int __init dra7xx_add_pcie_port(struct dra7xx_pcie *dra7xx, > >> return -EINVAL; > >> } > >> > >> + /* > >> + * Mark dra7xx_pcie_msi IRQ as IRQF_NO_THREAD > >> + * On -RT and if kernel is booting with "threadirqs" cmd line parameter > >> + * the dra7xx_pcie_msi_irq_handler() will be forced threaded but, > >> + * in the same time, it's IRQ dispatcher and calls generic_handle_irq(), > >> + * which, in turn, will be resolved to handle_simple_irq() call. > >> + * The handle_simple_irq() expected to be called with IRQ disabled, as > >> + * result kernle will display warning: > >> + * "irq XXX handler YYY+0x0/0x14 enabled interrupts". > >> + */ > > could you _please_ remove this coment? This kind of comment (if at all) > should be part of the commit message (which is the case more or less). IIRC, Grygorii specifically wanted to keep this comment in dra7xx, but I do agree that this level of detail is more appropriate for a changelog. If Grygorii and Kishon don't object, I can update the patch to remove it. > >> ret = devm_request_irq(&pdev->dev, pp->irq, > >> - dra7xx_pcie_msi_irq_handler, IRQF_SHARED, > >> + dra7xx_pcie_msi_irq_handler, > >> + IRQF_SHARED | IRQF_NO_THREAD, > >> "dra7-pcie-msi", pp); > >> if (ret) { > >> dev_err(&pdev->dev, "failed to request irq\n"); > >> diff --git a/drivers/pci/host/pci-exynos.c b/drivers/pci/host/pci-exynos.c > > Sebastian > -- > To unsubscribe from this list: send the line "unsubscribe linux-pci" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html