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Mon, 15 Jun 2026 21:30:52 -0700 (PDT) Received: from cmpatel-home.hsd1.or.comcast.net ([2601:1c0:5780:9200:9445:e681:a5ae:95ab]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2c42f2e5374sm112635475ad.5.2026.06.15.21.30.51 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 15 Jun 2026 21:30:52 -0700 (PDT) From: Chintan Patel To: linux@armlinux.org.uk Cc: deller@gmx.de, tzimmermann@suse.de, linux-fbdev@vger.kernel.org, dri-devel@lists.freedesktop.org, Chintan Patel Subject: [PATCH v3] fbdev: claim Cyber2000 SPARC I/O aperture before ioremap Date: Mon, 15 Jun 2026 21:30:35 -0700 Message-ID: <20260616043035.11952-1-chintanlike@gmail.com> X-Mailer: git-send-email 2.43.0 Precedence: bulk X-Mailing-List: linux-fbdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Claim the memory resource associated with the Cyber2000 SPARC MMIO aperture before accessing it. This is part of the effort to request memory regions in fbdev drivers. Signed-off-by: Chintan Patel --- v3: - Use pr_err() instead of pci_err() v2: - Use pci_err() for error reporting instead of printk(). drivers/video/fbdev/cyber2000fb.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/drivers/video/fbdev/cyber2000fb.c b/drivers/video/fbdev/cyber2000fb.c index 2d12f8e96c7e..9fced6bf6ffd 100644 --- a/drivers/video/fbdev/cyber2000fb.c +++ b/drivers/video/fbdev/cyber2000fb.c @@ -47,6 +47,7 @@ #include #include #include +#include #ifdef __arm__ #include @@ -1620,9 +1621,14 @@ static int cyberpro_pci_enable_mmio(struct cfb_info *cfb) */ unsigned char __iomem *iop; + if (!request_mem_region(0x3000000, 0x5000, "cyber2000fb iop")) { + pr_err("iga5000: cannot reserve I/O area 0x3000000\n"); + return -EBUSY; + } iop = ioremap(0x3000000, 0x5000); if (iop == NULL) { - printk(KERN_ERR "iga5000: cannot map I/O\n"); + pr_err("iga5000: cannot map I/O area\n"); + release_mem_region(0x3000000, 0x5000); return -ENOMEM; } @@ -1633,6 +1639,7 @@ static int cyberpro_pci_enable_mmio(struct cfb_info *cfb) writeb(EXT_BIU_MISC_LIN_ENABLE, iop + 0x3cf); iounmap(iop); + release_mem_region(0x3000000, 0x5000); #else /* * Most other machine types are "normal", so -- 2.43.0