[PATCH] fbdev: claim Cyber2000 SPARC I/O aperture before ioremap
From: Chintan Patel <hidden>
Date: 2026-06-11 03:53:07
Also in:
dri-devel
Subsystem:
cyberpro fb driver, framebuffer layer, the rest · Maintainers:
Russell King, Helge Deller, Linus Torvalds
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 <redacted> --- drivers/video/fbdev/cyber2000fb.c | 7 +++++++ 1 file changed, 7 insertions(+)
diff --git a/drivers/video/fbdev/cyber2000fb.c b/drivers/video/fbdev/cyber2000fb.c
index 2d12f8e96c7e..16ed56180ce2 100644
--- a/drivers/video/fbdev/cyber2000fb.c
+++ b/drivers/video/fbdev/cyber2000fb.c@@ -47,6 +47,7 @@ #include <linux/io.h> #include <linux/i2c.h> #include <linux/i2c-algo-bit.h> +#include <linux/ioport.h> #ifdef __arm__ #include <asm/mach-types.h>
@@ -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")) { + printk(KERN_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"); + 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