ARM: pm: avoid writing the auxillary control register for ARMv7

[pandora-kernel.git] / arch / arm / mm / proc-v7.S

diff --git a/arch/arm/mm/proc-v7.S b/arch/arm/mm/proc-v7.S
index a773f4e..9049c07 100644 (file)
--- a/arch/arm/mm/proc-v7.S
+++ b/arch/arm/mm/proc-v7.S
@@ -248,7 +248,9 @@ ENTRY(cpu_v7_do_resume)
        mcr     p15, 0, r7, c2, c0, 0   @ TTB 0
        mcr     p15, 0, r8, c2, c0, 1   @ TTB 1
        mcr     p15, 0, ip, c2, c0, 2   @ TTB control register
-       mcr     p15, 0, r10, c1, c0, 1  @ Auxiliary control register
+       mrc     p15, 0, r4, c1, c0, 1   @ Read Auxiliary control register
+       teq     r4, r10                 @ Is it already set?
+       mcrne   p15, 0, r10, c1, c0, 1  @ No, so write it
        mcr     p15, 0, r11, c1, c0, 2  @ Co-processor access control
        ldr     r4, =PRRR               @ PRRR
        ldr     r5, =NMRR               @ NMRR