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authorMahesh Salgaonkar <mahesh@linux.vnet.ibm.com>2019-03-04 22:42:19 +0300
committerMichael Ellerman <mpe@ellerman.id.au>2019-05-02 19:54:57 +0300
commitde269129a48a2d590ba1d20c719e19d86e3ddb3f (patch)
treef24b4a3afde2d90ce614a347129acf6324315a1a /arch/powerpc/platforms/powernv/opal-call.c
parent0acb5f64560a052fd66ab37b212a72964847160f (diff)
downloadlinux-de269129a48a2d590ba1d20c719e19d86e3ddb3f.tar.xz
powerpc/hmi: Fix kernel hang when TB is in error state.
On TOD/TB errors timebase register stops/freezes until HMI error recovery gets TOD/TB back into running state. On successful recovery, TB starts running again and udelay() that relies on TB value continues to function properly. But in case when HMI fails to recover from TOD/TB errors, the TB register stay freezed. With TB not running the __delay() function keeps looping and never return. If __delay() is called while in panic path then system hangs and never reboots after panic. Signed-off-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/platforms/powernv/opal-call.c')
-rw-r--r--arch/powerpc/platforms/powernv/opal-call.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/powernv/opal-call.c b/arch/powerpc/platforms/powernv/opal-call.c
index 7cba0d5da3ff..36c8fa3647a2 100644
--- a/arch/powerpc/platforms/powernv/opal-call.c
+++ b/arch/powerpc/platforms/powernv/opal-call.c
@@ -220,6 +220,7 @@ OPAL_CALL(opal_sensor_read, OPAL_SENSOR_READ);
OPAL_CALL(opal_get_param, OPAL_GET_PARAM);
OPAL_CALL(opal_set_param, OPAL_SET_PARAM);
OPAL_CALL(opal_handle_hmi, OPAL_HANDLE_HMI);
+OPAL_CALL(opal_handle_hmi2, OPAL_HANDLE_HMI2);
OPAL_CALL(opal_config_cpu_idle_state, OPAL_CONFIG_CPU_IDLE_STATE);
OPAL_CALL(opal_slw_set_reg, OPAL_SLW_SET_REG);
OPAL_CALL(opal_register_dump_region, OPAL_REGISTER_DUMP_REGION);