dmaengine: remove BUG_ON while registering devices
DMAengine core has BUG_ON to check for mandatory operations and ones based
on capabilities, but they use BUG_ON, so remove and move to error returns
and logging the errors gracefully
Acked-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
diff --git a/drivers/dma/dmaengine.c b/drivers/dma/dmaengine.c
index 428b141..b451354 100644
--- a/drivers/dma/dmaengine.c
+++ b/drivers/dma/dmaengine.c
@@ -923,28 +923,85 @@ int dma_async_device_register(struct dma_device *device)
return -ENODEV;
/* validate device routines */
- BUG_ON(dma_has_cap(DMA_MEMCPY, device->cap_mask) &&
- !device->device_prep_dma_memcpy);
- BUG_ON(dma_has_cap(DMA_XOR, device->cap_mask) &&
- !device->device_prep_dma_xor);
- BUG_ON(dma_has_cap(DMA_XOR_VAL, device->cap_mask) &&
- !device->device_prep_dma_xor_val);
- BUG_ON(dma_has_cap(DMA_PQ, device->cap_mask) &&
- !device->device_prep_dma_pq);
- BUG_ON(dma_has_cap(DMA_PQ_VAL, device->cap_mask) &&
- !device->device_prep_dma_pq_val);
- BUG_ON(dma_has_cap(DMA_MEMSET, device->cap_mask) &&
- !device->device_prep_dma_memset);
- BUG_ON(dma_has_cap(DMA_INTERRUPT, device->cap_mask) &&
- !device->device_prep_dma_interrupt);
- BUG_ON(dma_has_cap(DMA_CYCLIC, device->cap_mask) &&
- !device->device_prep_dma_cyclic);
- BUG_ON(dma_has_cap(DMA_INTERLEAVE, device->cap_mask) &&
- !device->device_prep_interleaved_dma);
+ if (!device->dev) {
+ pr_err("DMAdevice must have dev\n");
+ return -EIO;
+ }
- BUG_ON(!device->device_tx_status);
- BUG_ON(!device->device_issue_pending);
- BUG_ON(!device->dev);
+ if (dma_has_cap(DMA_MEMCPY, device->cap_mask) && !device->device_prep_dma_memcpy) {
+ dev_err(device->dev,
+ "Device claims capability %s, but op is not defined\n",
+ "DMA_MEMCPY");
+ return -EIO;
+ }
+
+ if (dma_has_cap(DMA_XOR, device->cap_mask) && !device->device_prep_dma_xor) {
+ dev_err(device->dev,
+ "Device claims capability %s, but op is not defined\n",
+ "DMA_XOR");
+ return -EIO;
+ }
+
+ if (dma_has_cap(DMA_XOR_VAL, device->cap_mask) && !device->device_prep_dma_xor_val) {
+ dev_err(device->dev,
+ "Device claims capability %s, but op is not defined\n",
+ "DMA_XOR_VAL");
+ return -EIO;
+ }
+
+ if (dma_has_cap(DMA_PQ, device->cap_mask) && !device->device_prep_dma_pq) {
+ dev_err(device->dev,
+ "Device claims capability %s, but op is not defined\n",
+ "DMA_PQ");
+ return -EIO;
+ }
+
+ if (dma_has_cap(DMA_PQ_VAL, device->cap_mask) && !device->device_prep_dma_pq_val) {
+ dev_err(device->dev,
+ "Device claims capability %s, but op is not defined\n",
+ "DMA_PQ_VAL");
+ return -EIO;
+ }
+
+ if (dma_has_cap(DMA_MEMSET, device->cap_mask) && !device->device_prep_dma_memset) {
+ dev_err(device->dev,
+ "Device claims capability %s, but op is not defined\n",
+ "DMA_MEMSET");
+ return -EIO;
+ }
+
+ if (dma_has_cap(DMA_INTERRUPT, device->cap_mask) && !device->device_prep_dma_interrupt) {
+ dev_err(device->dev,
+ "Device claims capability %s, but op is not defined\n",
+ "DMA_INTERRUPT");
+ return -EIO;
+ }
+
+ if (dma_has_cap(DMA_CYCLIC, device->cap_mask) && !device->device_prep_dma_cyclic) {
+ dev_err(device->dev,
+ "Device claims capability %s, but op is not defined\n",
+ "DMA_CYCLIC");
+ return -EIO;
+ }
+
+ if (dma_has_cap(DMA_INTERLEAVE, device->cap_mask) && !device->device_prep_interleaved_dma) {
+ dev_err(device->dev,
+ "Device claims capability %s, but op is not defined\n",
+ "DMA_INTERLEAVE");
+ return -EIO;
+ }
+
+
+ if (!device->device_tx_status) {
+ dev_err(device->dev, "Device tx_status is not defined\n");
+ return -EIO;
+ }
+
+
+ if (!device->device_issue_pending) {
+ dev_err(device->dev, "Device issue_pending is not defined\n");
+ return -EIO;
+ }
/* note: this only matters in the
* CONFIG_ASYNC_TX_ENABLE_CHANNEL_SWITCH=n case
