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Mon, 20 Apr 2026 06:45:00 -0700 (PDT) From: Amit Barzilai To: deller@gmx.de Cc: thomas.zimmermann@suse.de, linux-fbdev@vger.kernel.org, dri-devel@lists.freedesktop.org, Amit Barzilai Subject: [PATCH 1/3] fbdev: cobalt_lcdfb: Request memory region Date: Mon, 20 Apr 2026 16:44:22 +0300 Message-ID: <20260420134424.77494-2-amit.barzilai22@gmail.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260420134424.77494-1-amit.barzilai22@gmail.com> References: <20260420134424.77494-1-amit.barzilai22@gmail.com> Precedence: bulk X-Mailing-List: linux-fbdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Use devm_platform_get_and_ioremap_resource() instead of open-coding platform_get_resource() and devm_ioremap() separately. The helper requests the memory region before mapping it, which registers the range in /proc/iomem and prevents another driver from mapping the same registers. Assisted-by: Claude:claude-sonnet-4-6 --- drivers/video/fbdev/cobalt_lcdfb.c | 12 +++--------- 1 file changed, 3 insertions(+), 9 deletions(-) diff --git a/drivers/video/fbdev/cobalt_lcdfb.c b/drivers/video/fbdev/cobalt_lcdfb.c index 308967b5096a..f7faa95fefd3 100644 --- a/drivers/video/fbdev/cobalt_lcdfb.c +++ b/drivers/video/fbdev/cobalt_lcdfb.c @@ -295,19 +295,13 @@ static int cobalt_lcdfb_probe(struct platform_device *dev) if (!info) return -ENOMEM; - res = platform_get_resource(dev, IORESOURCE_MEM, 0); - if (!res) { + info->screen_base = devm_platform_get_and_ioremap_resource(dev, 0, &res); + if (IS_ERR(info->screen_base)) { framebuffer_release(info); - return -EBUSY; + return PTR_ERR(info->screen_base); } info->screen_size = resource_size(res); - info->screen_base = devm_ioremap(&dev->dev, res->start, - info->screen_size); - if (!info->screen_base) { - framebuffer_release(info); - return -ENOMEM; - } info->fbops = &cobalt_lcd_fbops; info->fix = cobalt_lcdfb_fix; -- 2.53.0