OMAP4 sleep entry code even though itself don't use many CPU registers makes call to the v7_flush_dcache_all() which uses them. Since v7_flush_dcache_all() doesn't make use of stack, the caller must take care of the stack frame. Otherwise it will lead to corrupted stack frame.
Fix it by saving used registers. Reported-by: Grygorii Strashko <[email protected]> Signed-off-by: Santosh Shilimkar <[email protected]> Cc: Kevin Hilman <[email protected]> --- arch/arm/mach-omap2/sleep44xx.S | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/arm/mach-omap2/sleep44xx.S b/arch/arm/mach-omap2/sleep44xx.S index 9f6b83d..b5823e9 100644 --- a/arch/arm/mach-omap2/sleep44xx.S +++ b/arch/arm/mach-omap2/sleep44xx.S @@ -58,7 +58,7 @@ ppa_por_params: * CPU failed to transition to targeted OFF/DORMANT state. */ ENTRY(omap4_finish_suspend) - stmfd sp!, {lr} + stmfd sp!, {r4-r12, lr} cmp r0, #0x0 beq do_WFI @ No lowpower state, jump to WFI @@ -226,7 +226,7 @@ scu_gp_clear: skip_scu_gp_clear: isb dsb - ldmfd sp!, {pc} + ldmfd sp!, {r4-r12, pc} ENDPROC(omap4_finish_suspend) /* -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
