dmaengine: cppi41: Clean up pointless warnings

With patches "dmaengine: cppi41: Fix runtime PM timeouts with USB mass
storage", and "dmaengine: cppi41: Fix oops in cppi41_runtime_resume",
the pm_runtime_get/put() in cppi41_irq() is no longer needed. We now
guarantee that cppi41 is enabled when dma is in use.

We can still get pointless error -115 when musb is configured as a
usb peripheral. That's because we should now check for the state of
is_suspended instead.

Let's just remove the now useless code and replace it with a WARN().

Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>

diff --git a/drivers/dma/cppi41.c b/drivers/dma/cppi41.c
index 55c1782e36239cd56c02df91fcea88582afdfe83..200828c60db9ffce12b968956271954a88ac54d0 100644 (file)
--- a/drivers/dma/cppi41.c
+++ b/drivers/dma/cppi41.c
@@ -323,12 +323,12 @@ static irqreturn_t cppi41_irq(int irq, void *data)
 
                while (val) {
                        u32 desc, len;
-                       int error;
 
-                       error = pm_runtime_get(cdd->ddev.dev);
-                       if (error < 0)
-                               dev_err(cdd->ddev.dev, "%s pm runtime get: %i\n",
-                                       __func__, error);
+                       /*
+                        * This should never trigger, see the comments in
+                        * push_desc_queue()
+                        */
+                       WARN_ON(cdd->is_suspended);
 
                        q_num = __fls(val);
                        val &= ~(1 << q_num);
@@ -349,9 +349,6 @@ static irqreturn_t cppi41_irq(int irq, void *data)
                        c->residue = pd_trans_len(c->desc->pd6) - len;
                        dma_cookie_complete(&c->txd);
                        dmaengine_desc_get_callback_invoke(&c->txd, NULL);
-
-                       pm_runtime_mark_last_busy(cdd->ddev.dev);
-                       pm_runtime_put_autosuspend(cdd->ddev.dev);
                }
        }
        return IRQ_HANDLED;