Commit 5cb843ca authored Jul 20, 2011 by Will Deacon

ARM: realview: ensure visibility of writes during reset



The various reset routines in mach-realview rely on an FPGA to
power-cycle the board after writing some magic runes to memory-mapped
registers.

This patch adds a dsb() following the writes, so that they become
visible before we mdelay(1000) in the arch_reset code. Without this
patch, the timeout would expire sporadically, causing the reset to fail.

Signed-off-by: Will Deacon <will.deacon@arm.com>

parent 7fdd3c49

arch/arm/mach-realview/include/mach/system.h

+1 −0

Original line number	Diff line number	Diff line
		@@ -44,6 +44,7 @@ static inline void arch_reset(char mode, const char *cmd)
		*/
		if (realview_reset)
		realview_reset(mode);
		dsb();
		}

		#endif