diff options
| author | Nicolas Pitre <nico@cam.org> | 2008-04-25 14:28:55 -0400 |
|---|---|---|
| committer | Nicolas Pitre <nico@cam.org> | 2008-04-28 15:57:41 -0400 |
| commit | fd153abb01c3fbcc47cd4ac3c0bc8801cfcc0009 (patch) | |
| tree | 938413e50e7a5afcd96f1c9a8d9c732f2397d758 /include/asm-arm/arch-orion5x | |
| parent | c5a1e8f7091c33c7f6b53f070d13380facab6607 (diff) | |
[ARM] Orion: fix ioremap() optimization
The ioremap() optimization used for internal register didn't cope
with the fact that paddr + size can wrap to zero if the area extends
to the end of the physical address space.
Issue isolated by Sylver Bruneau <sylver.bruneau@googlemail.com>.
Signed-off-by: Nicolas Pitre <nico@marvell.com>
Diffstat (limited to 'include/asm-arm/arch-orion5x')
| -rw-r--r-- | include/asm-arm/arch-orion5x/io.h | 9 |
1 files changed, 4 insertions, 5 deletions
diff --git a/include/asm-arm/arch-orion5x/io.h b/include/asm-arm/arch-orion5x/io.h index 5148ab7ad1f..50f8c880220 100644 --- a/include/asm-arm/arch-orion5x/io.h +++ b/include/asm-arm/arch-orion5x/io.h @@ -20,11 +20,10 @@ static inline void __iomem * __arch_ioremap(unsigned long paddr, size_t size, unsigned int mtype) { void __iomem *retval; - - if (mtype == MT_DEVICE && size && paddr >= ORION5X_REGS_PHYS_BASE && - paddr + size <= ORION5X_REGS_PHYS_BASE + ORION5X_REGS_SIZE) { - retval = (void __iomem *)ORION5X_REGS_VIRT_BASE + - (paddr - ORION5X_REGS_PHYS_BASE); + unsigned long offs = paddr - ORION5X_REGS_PHYS_BASE; + if (mtype == MT_DEVICE && size && offs < ORION5X_REGS_SIZE && + size <= ORION5X_REGS_SIZE && offs + size <= ORION5X_REGS_SIZE) { + retval = (void __iomem *)ORION5X_REGS_VIRT_BASE + offs; } else { retval = __arm_ioremap(paddr, size, mtype); } |