diff options
Diffstat (limited to 'drivers/vme/bridges/vme_ca91cx42.c')
| -rw-r--r-- | drivers/vme/bridges/vme_ca91cx42.c | 18 |
1 files changed, 15 insertions, 3 deletions
diff --git a/drivers/vme/bridges/vme_ca91cx42.c b/drivers/vme/bridges/vme_ca91cx42.c index 18078ecbfcc6..f692efcf683f 100644 --- a/drivers/vme/bridges/vme_ca91cx42.c +++ b/drivers/vme/bridges/vme_ca91cx42.c @@ -1192,7 +1192,7 @@ static int ca91cx42_dma_list_exec(struct vme_dma_list *list) { struct vme_dma_resource *ctrlr; struct ca91cx42_dma_entry *entry; - int retval = 0; + int retval; dma_addr_t bus_addr; u32 val; struct device *dev; @@ -1245,8 +1245,18 @@ static int ca91cx42_dma_list_exec(struct vme_dma_list *list) iowrite32(val, bridge->base + DGCS); - wait_event_interruptible(bridge->dma_queue, - ca91cx42_dma_busy(ctrlr->parent)); + retval = wait_event_interruptible(bridge->dma_queue, + ca91cx42_dma_busy(ctrlr->parent)); + + if (retval) { + val = ioread32(bridge->base + DGCS); + iowrite32(val | CA91CX42_DGCS_STOP_REQ, bridge->base + DGCS); + /* Wait for the operation to abort */ + wait_event(bridge->dma_queue, + ca91cx42_dma_busy(ctrlr->parent)); + retval = -EINTR; + goto exit; + } /* * Read status register, this register is valid until we kick off a @@ -1259,8 +1269,10 @@ static int ca91cx42_dma_list_exec(struct vme_dma_list *list) dev_err(dev, "ca91c042: DMA Error. DGCS=%08X\n", val); val = ioread32(bridge->base + DCTL); + retval = -EIO; } +exit: /* Remove list from running list */ mutex_lock(&ctrlr->mtx); list_del(&list->list); |