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authorViresh Kumar <viresh.kumar@st.com>2011-03-22 17:27:25 +0530
committerDan Williams <dan.j.williams@intel.com>2011-03-22 11:12:29 -0700
commitd42efe6bfb4eed8314c8ce3547f21954a4140399 (patch)
tree180057c663bf6bbfdbdcc7561254d9b86db5c0a1
parent5b9a4f98b2e29fb92a4a54ef12b2e3940f941ed9 (diff)
downloadop-kernel-dev-d42efe6bfb4eed8314c8ce3547f21954a4140399.zip
op-kernel-dev-d42efe6bfb4eed8314c8ce3547f21954a4140399.tar.gz
dmaengine/dmatest: Pass timeout via module params
When we try to test all channels present on our controller together, some channels of lower priority may be very slow as compared to others. If number of transfers is unlimited, some channels may timeout and will not finish within 3 seconds. Thus, while doing such regress testing we may need to have higher value of timeouts. This patch adds support for passing timeout value via module parameters. Default value is 3 msec, a negative value means max timeout possible. Signed-off-by: Viresh Kumar <viresh.kumar@st.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
-rw-r--r--drivers/dma/dmatest.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/dma/dmatest.c b/drivers/dma/dmatest.c
index 7e1b0aa..e0888cb 100644
--- a/drivers/dma/dmatest.c
+++ b/drivers/dma/dmatest.c
@@ -54,6 +54,11 @@ module_param(pq_sources, uint, S_IRUGO);
MODULE_PARM_DESC(pq_sources,
"Number of p+q source buffers (default: 3)");
+static int timeout = 3000;
+module_param(timeout, uint, S_IRUGO);
+MODULE_PARM_DESC(timeout, "Transfer Timeout in msec (default: 3000), \
+ Pass -1 for infinite timeout");
+
/*
* Initialization patterns. All bytes in the source buffer has bit 7
* set, all bytes in the destination buffer has bit 7 cleared.
@@ -299,7 +304,7 @@ static int dmatest_func(void *data)
dma_addr_t dma_srcs[src_cnt];
dma_addr_t dma_dsts[dst_cnt];
struct completion cmp;
- unsigned long tmo = msecs_to_jiffies(3000);
+ unsigned long tmo = msecs_to_jiffies(timeout);
u8 align = 0;
total_tests++;
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