linux-kernel - Re: [PATCH 11/26] cxl/pci: Delay event buffer allocation

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Date: Mon, 25 Mar 2024 15:26:21 -0700
From: Davidlohr Bueso <dave@...olabs.net>
To: Ira Weiny <ira.weiny@...el.com>
Cc: Dave Jiang <dave.jiang@...el.com>, Fan Ni <fan.ni@...sung.com>, 
	Jonathan Cameron <Jonathan.Cameron@...wei.com>, Navneet Singh <navneet.singh@...el.com>, 
	Dan Williams <dan.j.williams@...el.com>, Alison Schofield <alison.schofield@...el.com>, 
	Vishal Verma <vishal.l.verma@...el.com>, linux-btrfs@...r.kernel.org, linux-cxl@...r.kernel.org, 
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 11/26] cxl/pci: Delay event buffer allocation

On Sun, 24 Mar 2024, Ira Weiny wrote:

>The event buffer does not need to be allocated if something has failed
>in setting up event irq's.
>
>In prep for adjusting event configuration for DCD events move the buffer
>allocation to the end of the event configuration.

The above could be removed and just picked up independet of dcd.

Reviewed-by: Davidlohr Bueso <dave@...olabs.net>

>
>Signed-off-by: Ira Weiny <ira.weiny@...el.com>
>---
> drivers/cxl/pci.c | 8 ++++----
> 1 file changed, 4 insertions(+), 4 deletions(-)
>
>diff --git a/drivers/cxl/pci.c b/drivers/cxl/pci.c
>index cedd9b05f129..ccaf4ad26a4f 100644
>--- a/drivers/cxl/pci.c
>+++ b/drivers/cxl/pci.c
>@@ -756,10 +756,6 @@ static int cxl_event_config(struct pci_host_bridge *host_bridge,
>		return 0;
>	}
>
>-	rc = cxl_mem_alloc_event_buf(mds);
>-	if (rc)
>-		return rc;
>-
>	rc = cxl_event_get_int_policy(mds, &policy);
>	if (rc)
>		return rc;
>@@ -777,6 +773,10 @@ static int cxl_event_config(struct pci_host_bridge *host_bridge,
>	if (rc)
>		return rc;
>
>+	rc = cxl_mem_alloc_event_buf(mds);
>+	if (rc)
>+		return rc;
>+
>	rc = cxl_event_irqsetup(mds, &policy);
>	if (rc)
>		return rc;
>
>--
>2.44.0
>