[PATCH] dmaengine: dmatest: timeout value of -1 should specify infinite wait

[Hook, Gary]

The dmatest module parameter 'timeout' is documented as accepting a
-1 to mean "infinite timeout". Change the parameter to to signed
integer, and check the value to call the appropriate wait_event()
function.

Signed-off-by: Gary R Hook <gary.h...@amd.com>
---
 drivers/dma/dmatest.c |   11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/drivers/dma/dmatest.c b/drivers/dma/dmatest.c
index b96814a7dceb..28a237686578 100644
--- a/drivers/dma/dmatest.c
+++ b/drivers/dma/dmatest.c
@@ -63,7 +63,7 @@ MODULE_PARM_DESC(pq_sources,
                "Number of p+q source buffers (default: 3)");
 
 static int timeout = 3000;
-module_param(timeout, uint, S_IRUGO | S_IWUSR);
+module_param(timeout, int, S_IRUGO | S_IWUSR);
 MODULE_PARM_DESC(timeout, "Transfer Timeout in msec (default: 3000), "
                 "Pass -1 for infinite timeout");
 
@@ -795,8 +795,13 @@ static int dmatest_func(void *data)
                }
                dma_async_issue_pending(chan);
 
-               wait_event_freezable_timeout(thread->done_wait, done->done,
-                                            msecs_to_jiffies(params->timeout));
+               /* A timeout value of -1 means infinite wait */
+               if (timeout == -1)
+                       wait_event_freezable(thread->done_wait, done->done);
+               else
+                       wait_event_freezable_timeout(thread->done_wait,
+                                       done->done,
+                                       msecs_to_jiffies(params->timeout));
 
                status = dma_async_is_tx_complete(chan, cookie, NULL, NULL);