>From 070a9c01d94e5efbdf0afae9ad2ddab380a2513e Mon Sep 17 00:00:00 2001
From: Petr Cvek <petr.cvek@tul.cz>
Date: Thu, 23 Feb 2017 01:07:51 +0100
Subject: [PATCH] DMA/MMC debugs

---
 drivers/dma/virt-dma.c    |  6 +++++-
 drivers/mmc/host/pxamci.c | 18 ++++++++++++++++--
 2 files changed, 21 insertions(+), 3 deletions(-)

diff --git a/drivers/dma/virt-dma.c b/drivers/dma/virt-dma.c
index e47fc9b0944f..c7ea39ea97fb 100644
--- a/drivers/dma/virt-dma.c
+++ b/drivers/dma/virt-dma.c
@@ -101,15 +101,19 @@ static void vchan_complete(unsigned long arg)
 	}
 	spin_unlock_irq(&vc->lock);
 
+pr_info("###pre\n");
 	dmaengine_desc_callback_invoke(&cb, NULL);
 
 	while (!list_empty(&head)) {
 		vd = list_first_entry(&head, struct virt_dma_desc, node);
 		dmaengine_desc_get_callback(&vd->tx, &cb);
+pr_info("###post\n");
 
 		list_del(&vd->node);
-		if (dmaengine_desc_test_reuse(&vd->tx))
+		if (dmaengine_desc_test_reuse(&vd->tx)) {
+			pr_info("###reuse\n");
 			list_add(&vd->node, &vc->desc_allocated);
+		}
 		else
 			vc->desc_free(vd);
 
diff --git a/drivers/mmc/host/pxamci.c b/drivers/mmc/host/pxamci.c
index c763b404510f..d7f04b11e9e6 100644
--- a/drivers/mmc/host/pxamci.c
+++ b/drivers/mmc/host/pxamci.c
@@ -191,6 +191,8 @@ static void pxamci_setup_data(struct pxamci_host *host, struct mmc_data *data)
 
 	host->data = data;
 
+pr_info("##pxamci_setup_data\n");
+
 	writel(nob, host->base + MMC_NOB);
 	writel(data->blksz, host->base + MMC_BLKLEN);
 
@@ -300,8 +302,10 @@ static int pxamci_cmd_done(struct pxamci_host *host, unsigned int stat)
 	int i;
 	u32 v;
 
-	if (!cmd)
+	if (!cmd) {
+pr_info("###pxamci_cmd_done NONE\n");
 		return 0;
+	}
 
 	host->cmd = NULL;
 
@@ -354,8 +358,10 @@ static int pxamci_data_done(struct pxamci_host *host, unsigned int stat)
 	struct mmc_data *data = host->data;
 	struct dma_chan *chan;
 
-	if (!data)
+	if (!data) {
+pr_info("###pxamci_data_done NONE\n");
 		return 0;
+	}
 
 	if (data->flags & MMC_DATA_READ)
 		chan = host->dma_chan_rx;
@@ -385,6 +391,7 @@ static int pxamci_data_done(struct pxamci_host *host, unsigned int stat)
 	host->data = NULL;
 	if (host->mrq->stop) {
 		pxamci_stop_clock(host);
+pr_info("##pxamci_start_cmd DD\n");
 		pxamci_start_cmd(host, host->mrq->stop, host->cmdat);
 	} else {
 		pxamci_finish_request(host, host->mrq);
@@ -441,6 +448,7 @@ static void pxamci_request(struct mmc_host *mmc, struct mmc_request *mrq)
 		if (mrq->data->flags & MMC_DATA_WRITE)
 			cmdat |= CMDAT_WRITE;
 	}
+pr_info("##pxamci_start_cmd RQ\n");
 
 	pxamci_start_cmd(host, mrq->cmd, cmdat);
 }
@@ -568,13 +576,19 @@ static void pxamci_dma_irq(void *param)
 
 	status = dmaengine_tx_status(chan, host->dma_cookie, &state);
 
+pr_info("!!!cookie=%x complete=%x used=%x ... status=%i\n",
+    host->dma_cookie,chan->completed_cookie,chan->cookie,
+    status);
+
 	if (likely(status == DMA_COMPLETE)) {
 		writel(BUF_PART_FULL, host->base + MMC_PRTBUF);
+/*
 	} else {
 		pr_err("%s: DMA error on %s channel\n", mmc_hostname(host->mmc),
 			host->data->flags & MMC_DATA_READ ? "rx" : "tx");
 		host->data->error = -EIO;
 		pxamci_data_done(host, 0);
+*/
 	}
 
 out_unlock:
-- 
2.11.0