[Qemu-devel] [PATCH] hw/omap_gpio: Fix infinite recursion when doing 8/16 bit reads

[Peter Maydell <peter.maydell@linaro.org>]

Fix a long-standing bug which meant that any attempt to do an
8 or 16 bit read from the OMAP GPIO module would cause qemu to
crash due to an infinite recursion.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
This has actually been in the code since the original OMAP2 support
was added in 2008; we've never noticed before because the kernel happened
to always do 32 bit accesses...
Long term we should fix this by conversion to MemoryRegion; this is
the minimally invasive fix for 1.0.

 hw/omap_gpio.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/hw/omap_gpio.c b/hw/omap_gpio.c
index d775df6..d630748 100644
--- a/hw/omap_gpio.c
+++ b/hw/omap_gpio.c
@@ -510,7 +510,7 @@ static void omap2_gpio_module_write(void *opaque, target_phys_addr_t addr,
 
 static uint32_t omap2_gpio_module_readp(void *opaque, target_phys_addr_t addr)
 {
-    return omap2_gpio_module_readp(opaque, addr) >> ((addr & 3) << 3);
+    return omap2_gpio_module_read(opaque, addr & ~3) >> ((addr & 3) << 3);
 }
 
 static void omap2_gpio_module_writep(void *opaque, target_phys_addr_t addr,
-- 
1.7.4.1