From: Samuel Obuch samuel.obuch@codasip.com
Use __raw_read* and __raw_write* functions to ensure read/write is passed to the memory-mapped regions, as non-volatile accesses may get optimised out.
Signed-off-by: Samuel Obuch samuel.obuch@codasip.com --- drivers/net/xilinx_emaclite.c | 9 ++++----- 1 file changed, 4 insertions(+), 5 deletions(-)
diff --git a/drivers/net/xilinx_emaclite.c b/drivers/net/xilinx_emaclite.c index 2e152bf873..c12736d0ee 100644 --- a/drivers/net/xilinx_emaclite.c +++ b/drivers/net/xilinx_emaclite.c @@ -113,12 +113,12 @@ static void xemaclite_alignedread(u32 *srcptr, void *destptr, u32 bytecount) /* Word aligned buffer, no correction needed. */ to32ptr = (u32 *) destptr; while (bytecount > 3) { - *to32ptr++ = *from32ptr++; + *to32ptr++ = __raw_readl(from32ptr++); bytecount -= 4; } to8ptr = (u8 *) to32ptr;
- alignbuffer = *from32ptr++; + alignbuffer = __raw_readl(from32ptr++); from8ptr = (u8 *) &alignbuffer;
for (i = 0; i < bytecount; i++) @@ -136,8 +136,7 @@ static void xemaclite_alignedwrite(void *srcptr, u32 *destptr, u32 bytecount)
from32ptr = (u32 *) srcptr; while (bytecount > 3) { - - *to32ptr++ = *from32ptr++; + __raw_writel(*from32ptr++, to32ptr++); bytecount -= 4; }
@@ -148,7 +147,7 @@ static void xemaclite_alignedwrite(void *srcptr, u32 *destptr, u32 bytecount) for (i = 0; i < bytecount; i++) *to8ptr++ = *from8ptr++;
- *to32ptr++ = alignbuffer; + __raw_writel(alignbuffer, to32ptr++); }
static int wait_for_bit(const char *func, u32 *reg, const u32 mask,