The patch titled
Blackfin SPI Driver: add a few more DMA debug messages
has been removed from the -mm tree. Its filename was
blackfin-spi-driver-add-a-few-more-dma-debug-messages.patch
This patch was dropped because it was merged into mainline or a subsystem tree
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: Blackfin SPI Driver: add a few more DMA debug messages
From: Mike Frysinger <vapier.adi@xxxxxxxxx>
Because of DMA hardware issue, we were trying to use software workaround.
This patch add some useful debug messages to help us debugging the DMA
code.
Signed-off-by: Mike Frysinger <vapier.adi@xxxxxxxxx>
Signed-off-by: Bryan Wu <cooloney@xxxxxxxxxx>
Cc: David Brownell <david-b@xxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/spi/spi_bfin5xx.c | 12 ++++++++++--
1 file changed, 10 insertions(+), 2 deletions(-)
diff -puN drivers/spi/spi_bfin5xx.c~blackfin-spi-driver-add-a-few-more-dma-debug-messages drivers/spi/spi_bfin5xx.c
--- a/drivers/spi/spi_bfin5xx.c~blackfin-spi-driver-add-a-few-more-dma-debug-messages
+++ a/drivers/spi/spi_bfin5xx.c
@@ -559,9 +559,13 @@ static irqreturn_t dma_irq_handler(int i
struct driver_data *drv_data = dev_id;
struct chip_data *chip = drv_data->cur_chip;
struct spi_message *msg = drv_data->cur_msg;
+ unsigned short dmastat = get_dma_curr_irqstat(drv_data->dma_channel);
u16 spistat = read_STAT(drv_data);
- dev_dbg(&drv_data->pdev->dev, "in dma_irq_handler\n");
+ dev_dbg(&drv_data->pdev->dev,
+ "in dma_irq_handler dmastat:0x%x spistat:0x%x\n",
+ dmastat, spistat);
+
clear_dma_irqstat(drv_data->dma_channel);
/* Wait for DMA to complete */
@@ -631,6 +635,7 @@ static void pump_transfers(unsigned long
/* Handle for abort */
if (message->state == ERROR_STATE) {
+ dev_dbg(&drv_data->pdev->dev, "transfer: we've hit an error\n");
message->status = -EIO;
giveback(drv_data);
return;
@@ -638,6 +643,7 @@ static void pump_transfers(unsigned long
/* Handle end of message */
if (message->state == DONE_STATE) {
+ dev_dbg(&drv_data->pdev->dev, "transfer: all done!\n");
message->status = 0;
giveback(drv_data);
return;
@@ -645,6 +651,7 @@ static void pump_transfers(unsigned long
/* Delay if requested at end of transfer */
if (message->state == RUNNING_STATE) {
+ dev_dbg(&drv_data->pdev->dev, "transfer: still running ...\n");
previous = list_entry(transfer->transfer_list.prev,
struct spi_transfer, transfer_list);
if (previous->delay_usecs)
@@ -806,7 +813,8 @@ static void pump_transfers(unsigned long
dma_config = (RESTART | dma_width | DI_EN);
if (drv_data->rx != NULL) {
/* set transfer mode, and enable SPI */
- dev_dbg(&drv_data->pdev->dev, "doing DMA in.\n");
+ dev_dbg(&drv_data->pdev->dev, "doing DMA in to %p (size %zx)\n",
+ drv_data->rx, drv_data->len_in_bytes);
/* invalidate caches, if needed */
if (bfin_addr_dcachable((unsigned long) drv_data->rx))
_
Patches currently in -mm which might be from vapier.adi@xxxxxxxxx are
origin.patch
linux-next.patch
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