[PATCH v2 2/2] soc: qcom: spm: Fix idle on THUMB2 kernels

From: Stephen Boyd
Date: Tue Jun 02 2015 - 15:13:43 EST


The ifc6410 firmware always enters the kernel in ARM state from
deep idle. Use the cpu_resume_arm() wrapper instead of
cpu_resume() to property switch into the THUMB2 state when we
wake up from idle.

This fixes a problem reported by Kevin Hilman on next-20150601
where the ifc6410 fails to boot a THUMB2 kernel because the
platform's firmware always enters the kernel in ARM mode from
deep idle states.

Reported-by: Kevin Hilman <khilman@xxxxxxxxxx>
Cc: Ard Biesheuvel <ard.biesheuvel@xxxxxxxxxx>
Cc: Lina Iyer <lina.iyer@xxxxxxxxxx>
Signed-off-by: Stephen Boyd <sboyd@xxxxxxxxxxxxxx>
---
drivers/soc/qcom/spm.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/soc/qcom/spm.c b/drivers/soc/qcom/spm.c
index b562af816c0a..b04b05a0904e 100644
--- a/drivers/soc/qcom/spm.c
+++ b/drivers/soc/qcom/spm.c
@@ -260,7 +260,7 @@ static int __init qcom_cpuidle_init(struct device_node *cpu_node, int cpu)
/* We have atleast one power down mode */
cpumask_clear(&mask);
cpumask_set_cpu(cpu, &mask);
- qcom_scm_set_warm_boot_addr(cpu_resume, &mask);
+ qcom_scm_set_warm_boot_addr(cpu_resume_arm, &mask);
}

per_cpu(qcom_idle_ops, cpu) = fns;
--
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project

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