staging: ti dspbridge: mmufault: trivial cleanups

No functional changes.

Signed-off-by: Felipe Contreras <felipe.contreras@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/staging/tidspbridge/core/mmu_fault.c b/drivers/staging/tidspbridge/core/mmu_fault.c
index 5c0124f70732b4fda2b9cc1f99f499a802f510df..42fe23f13eb76933978ccefbf9b9a2ff76bb03cd 100644 (file)
--- a/drivers/staging/tidspbridge/core/mmu_fault.c
+++ b/drivers/staging/tidspbridge/core/mmu_fault.c
@@ -40,11 +40,8 @@
 #include "_tiomap.h"
 #include "mmu_fault.h"
 
-static u32 dmmu_event_mask;
 u32 fault_addr;
 
-static bool mmu_check_if_fault(struct bridge_dev_context *dev_context);
-
 /*
  *  ======== mmu_fault_dpc ========
  *      Deferred procedure call to handle DSP MMU fault.
@@ -53,9 +50,10 @@ void mmu_fault_dpc(IN unsigned long pRefData)
 {
        struct deh_mgr *hdeh_mgr = (struct deh_mgr *)pRefData;
 
-       if (hdeh_mgr)
-               bridge_deh_notify(hdeh_mgr, DSP_MMUFAULT, 0L);
+       if (!hdeh_mgr)
+               return;
 
+       bridge_deh_notify(hdeh_mgr, DSP_MMUFAULT, 0L);
 }
 
 /*
@@ -64,76 +62,44 @@ void mmu_fault_dpc(IN unsigned long pRefData)
  */
 irqreturn_t mmu_fault_isr(int irq, IN void *pRefData)
 {
-       struct deh_mgr *deh_mgr_obj = (struct deh_mgr *)pRefData;
-       struct bridge_dev_context *dev_context;
+       struct deh_mgr *deh_mgr_obj = pRefData;
        struct cfg_hostres *resources;
+       u32 dmmu_event_mask;
 
-       DBC_REQUIRE(irq == INT_DSP_MMU_IRQ);
-       DBC_REQUIRE(deh_mgr_obj);
-
-       if (deh_mgr_obj) {
-
-               dev_context =
-                   (struct bridge_dev_context *)deh_mgr_obj->hbridge_context;
-
-               resources = dev_context->resources;
+       if (!deh_mgr_obj)
+               return IRQ_HANDLED;
 
-               if (!resources) {
-                       dev_dbg(bridge, "%s: Failed to get Host Resources\n",
+       resources = deh_mgr_obj->hbridge_context->resources;
+       if (!resources) {
+               dev_dbg(bridge, "%s: Failed to get Host Resources\n",
                                __func__);
-                       return IRQ_HANDLED;
-               }
-               if (mmu_check_if_fault(dev_context)) {
-                       printk(KERN_INFO "***** DSPMMU FAULT ***** IRQStatus "
-                              "0x%x\n", dmmu_event_mask);
-                       printk(KERN_INFO "***** DSPMMU FAULT ***** fault_addr "
-                              "0x%x\n", fault_addr);
-                       /*
-                        * Schedule a DPC directly. In the future, it may be
-                        * necessary to check if DSP MMU fault is intended for
-                        * Bridge.
-                        */
-                       tasklet_schedule(&deh_mgr_obj->dpc_tasklet);
-
-                       /* Reset err_info structure before use. */
-                       deh_mgr_obj->err_info.dw_err_mask = DSP_MMUFAULT;
-                       deh_mgr_obj->err_info.dw_val1 = fault_addr >> 16;
-                       deh_mgr_obj->err_info.dw_val2 = fault_addr & 0xFFFF;
-                       deh_mgr_obj->err_info.dw_val3 = 0L;
-                       /* Disable the MMU events, else once we clear it will
-                        * start to raise INTs again */
-                       hw_mmu_event_disable(resources->dw_dmmu_base,
-                                            HW_MMU_TRANSLATION_FAULT);
-               } else {
-                       hw_mmu_event_disable(resources->dw_dmmu_base,
-                                            HW_MMU_ALL_INTERRUPTS);
-               }
+               return IRQ_HANDLED;
        }
-       return IRQ_HANDLED;
-}
 
-/*
- *  ======== mmu_check_if_fault ========
- *      Check to see if MMU Fault is valid TLB miss from DSP
- *  Note: This function is called from an ISR
- */
-static bool mmu_check_if_fault(struct bridge_dev_context *dev_context)
-{
-
-       bool ret = false;
-       hw_status hw_status_obj;
-       struct cfg_hostres *resources = dev_context->resources;
-
-       if (!resources) {
-               dev_dbg(bridge, "%s: Failed to get Host Resources in\n",
-                       __func__);
-               return ret;
-       }
-       hw_status_obj =
-           hw_mmu_event_status(resources->dw_dmmu_base, &dmmu_event_mask);
+       hw_mmu_event_status(resources->dw_dmmu_base, &dmmu_event_mask);
        if (dmmu_event_mask == HW_MMU_TRANSLATION_FAULT) {
                hw_mmu_fault_addr_read(resources->dw_dmmu_base, &fault_addr);
-               ret = true;
+               dev_info(bridge, "%s: status=0x%x, fault_addr=0x%x\n", __func__,
+                               dmmu_event_mask, fault_addr);
+               /*
+                * Schedule a DPC directly. In the future, it may be
+                * necessary to check if DSP MMU fault is intended for
+                * Bridge.
+                */
+               tasklet_schedule(&deh_mgr_obj->dpc_tasklet);
+
+               /* Reset err_info structure before use. */
+               deh_mgr_obj->err_info.dw_err_mask = DSP_MMUFAULT;
+               deh_mgr_obj->err_info.dw_val1 = fault_addr >> 16;
+               deh_mgr_obj->err_info.dw_val2 = fault_addr & 0xFFFF;
+               deh_mgr_obj->err_info.dw_val3 = 0L;
+               /* Disable the MMU events, else once we clear it will
+                * start to raise INTs again */
+               hw_mmu_event_disable(resources->dw_dmmu_base,
+                               HW_MMU_TRANSLATION_FAULT);
+       } else {
+               hw_mmu_event_disable(resources->dw_dmmu_base,
+                               HW_MMU_ALL_INTERRUPTS);
        }
-       return ret;
+       return IRQ_HANDLED;
 }