msm: kgsl: Write the retired timestamp on resume

Write the retired timestamp into the expected location. This fixes
userspace crashes after resume when the retired timestamp is read
as 0 instead of the expected last timestamp.

drivers/gpu/msm/adreno_ringbuffer.c

@@ -309,6 +309,11 @@ int adreno_ringbuffer_start(struct adreno_ringbuffer *rb, unsigned int init_ram)
 	adreno_regwrite(device, REG_SCRATCH_UMSK,
 			     GSL_RB_MEMPTRS_SCRATCH_MASK);
 
+    /* update the eoptimestamp field with the last retired timestamp */
+    kgsl_sharedmem_writel(&device->memstore,
+			     KGSL_DEVICE_MEMSTORE_OFFSET(eoptimestamp),
+			     rb->timestamp);
+
 	/* load the CP ucode */
 
 	status = adreno_ringbuffer_load_pm4_ucode(device);