[PATCHv2 3/4] staging: tidspbridge - remove disabling twl when printing DSP stack

[Fernando Guzman Lugo]

Now the SHM segments are not in lock tlbs, instead
they are in translation tables. So we cannot disable
twl in order to get the DSP stack dump. Also add a check
for __get_free_page allocation.

Signed-off-by: Fernando Guzman Lugo <fernando.lugo@xxxxxx>
---
 drivers/staging/tidspbridge/core/ue_deh.c |    9 ++-------
 1 files changed, 2 insertions(+), 7 deletions(-)

diff --git a/drivers/staging/tidspbridge/core/ue_deh.c b/drivers/staging/tidspbridge/core/ue_deh.c
index 0537edf..183900e 100644
--- a/drivers/staging/tidspbridge/core/ue_deh.c
+++ b/drivers/staging/tidspbridge/core/ue_deh.c
@@ -180,13 +180,8 @@ static void mmu_fault_print_stack(struct bridge_dev_context *dev_context)
 	resources = dev_context->resources;
 	dummy_va_addr = (void*)__get_free_page(GFP_ATOMIC);
 
-	/*
-	 * Before acking the MMU fault, let's make sure MMU can only
-	 * access entry #0. Then add a new entry so that the DSP OS
-	 * can continue in order to dump the stack.
-	 */
-	hw_mmu_twl_disable(resources->dw_dmmu_base);
-	hw_mmu_tlb_flush_all(resources->dw_dmmu_base);
+	if (!dummy_va_addr)
+		return;
 
 	hw_mmu_tlb_add(resources->dw_dmmu_base,
 			virt_to_phys(dummy_va_addr), fault_addr,
-- 
1.7.3.2

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