Signed-off-by: Jan Luebbe <[email protected]>
---
Changes since v1:
- As recommended by Joerg Roedel, check for overlap with vmalloc and
module address ranges.
lib/dma-debug.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/lib/dma-debug.c b/lib/dma-debug.c
index 66ce414..b35992b 100644
--- a/lib/dma-debug.c
+++ b/lib/dma-debug.c
@@ -944,6 +944,14 @@ static void check_for_illegal_area(struct device *dev,
void *addr, unsigned long
if (overlap(addr, len, _text, _etext) ||
overlap(addr, len, __start_rodata, __end_rodata))
err_printk(dev, NULL, "DMA-API: device driver maps memory from
kernel text or rodata [addr=%p] [len=%lu]\n", addr, len);
+#ifdef CONFIG_MMU
+ if (overlap(addr, len, (void *)VMALLOC_START, (void *)VMALLOC_END))
+ err_printk(dev, NULL, "DMA-API: device driver maps memory from
vmalloc address range [addr=%p] [len=%lu]\n", addr, len);
+#endif
+#if defined(CONFIG_MODULES) && defined(MODULES_VADDR)
+ if (overlap(addr, len, (void *)MODULES_VADDR, (void *)MODULES_END))
+ err_printk(dev, NULL, "DMA-API: device driver maps memory from
kernel module address range [addr=%p] [len=%lu]\n", addr, len);
+#endif
}
static void check_sync(struct device *dev,
--
1.7.10.4
--
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