Re: [PATCH v3] PCI: hosts: mark pcie/pci (msi) irq cascade handler as IRQF_NO_THREAD

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On 01/13/2016 07:50 PM, Bjorn Helgaas wrote:
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

True.

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.

But no objections from my side. Thanks a lot.

--
regards,
-grygorii
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