linux-kernel - [PATCH v2] drm/lsdc: Request PCI BAR

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Message-ID: <20241125140228.58492-2-pstanner@redhat.com>
Date: Mon, 25 Nov 2024 15:02:29 +0100
From: Philipp Stanner <pstanner@...hat.com>
To: Sui Jingfeng <suijingfeng@...ngson.cn>,
	Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
	Maxime Ripard <mripard@...nel.org>,
	Thomas Zimmermann <tzimmermann@...e.de>,
	David Airlie <airlied@...il.com>,
	Simona Vetter <simona@...ll.ch>
Cc: dri-devel@...ts.freedesktop.org,
	linux-kernel@...r.kernel.org,
	Philipp Stanner <pstanner@...hat.com>,
	Sui Jingfeng <sui.jingfeng@...ux.dev>
Subject: [PATCH v2] drm/lsdc: Request PCI BAR

lsdc currently just ioremaps its PCI BAR with pcim_iomap(). Performing
a region regquest additionally can make the driver more robust.

Replace pcim_iomap() with the managed function pcim_iomap_region() which
performs the request and ioremaps the BAR.

Signed-off-by: Philipp Stanner <pstanner@...hat.com>
Reviewed-by: Sui Jingfeng <sui.jingfeng@...ux.dev>
---
Changes in v2:
  - Add Sui's RB
---
 drivers/gpu/drm/loongson/lsdc_drv.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/loongson/lsdc_drv.c b/drivers/gpu/drm/loongson/lsdc_drv.c
index b350bdcf1645..d373c13a007d 100644
--- a/drivers/gpu/drm/loongson/lsdc_drv.c
+++ b/drivers/gpu/drm/loongson/lsdc_drv.c
@@ -232,9 +232,9 @@ lsdc_create_device(struct pci_dev *pdev,
 	lsdc_gem_init(ddev);
 
 	/* Bar 0 of the DC device contains the MMIO register's base address */
-	ldev->reg_base = pcim_iomap(pdev, 0, 0);
-	if (!ldev->reg_base)
-		return ERR_PTR(-ENODEV);
+	ldev->reg_base = pcim_iomap_region(pdev, 0, "lsdc");
+	if (IS_ERR(ldev->reg_base))
+		return ldev->reg_base;
 
 	spin_lock_init(&ldev->reglock);
 
-- 
2.47.0