linux-kernel - [PATCH v3 04/10] cxl/pci: Remove pci request/release regions

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Date:   Sat, 09 Oct 2021 09:44:18 -0700
From:   Dan Williams <dan.j.williams@...el.com>
To:     linux-cxl@...r.kernel.org
Cc:     Ben Widawsky <ben.widawsky@...el.com>, linux-pci@...r.kernel.org,
        linux-kernel@...r.kernel.org, hch@....de
Subject: [PATCH v3 04/10] cxl/pci: Remove pci request/release regions

From: Ben Widawsky <ben.widawsky@...el.com>

Quoting Dan, "... the request + release regions should probably just be
dropped. It's not like any of the register enumeration would collide
with someone else who already has the registers mapped. The collision
only comes when the registers are mapped for their final usage, and that
will have more precision in the request."

Suggested-by: Dan Williams <dan.j.williams@...el.com>
Signed-off-by: Ben Widawsky <ben.widawsky@...el.com>
Signed-off-by: Dan Williams <dan.j.williams@...el.com>
---
 drivers/cxl/pci.c |    5 -----
 1 file changed, 5 deletions(-)

diff --git a/drivers/cxl/pci.c b/drivers/cxl/pci.c
index 9c178002d49e..21dd10a77eb3 100644
--- a/drivers/cxl/pci.c
+++ b/drivers/cxl/pci.c
@@ -453,9 +453,6 @@ static int cxl_pci_setup_regs(struct cxl_mem *cxlm)
 		return -ENXIO;
 	}
 
-	if (pci_request_mem_regions(pdev, pci_name(pdev)))
-		return -ENODEV;
-
 	/* Get the size of the Register Locator DVSEC */
 	pci_read_config_dword(pdev, regloc + PCI_DVSEC_HEADER1, &regloc_size);
 	regloc_size = FIELD_GET(PCI_DVSEC_HEADER1_LENGTH_MASK, regloc_size);
@@ -499,8 +496,6 @@ static int cxl_pci_setup_regs(struct cxl_mem *cxlm)
 		n_maps++;
 	}
 
-	pci_release_mem_regions(pdev);
-
 	for (i = 0; i < n_maps; i++) {
 		ret = cxl_map_regs(cxlm, &maps[i]);
 		if (ret)