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-rw-r--r--drivers/ntb/test/ntb_tool.c10
1 files changed, 8 insertions, 2 deletions
diff --git a/drivers/ntb/test/ntb_tool.c b/drivers/ntb/test/ntb_tool.c
index 209ef7ceb98a..a0ead31cd799 100644
--- a/drivers/ntb/test/ntb_tool.c
+++ b/drivers/ntb/test/ntb_tool.c
@@ -239,7 +239,14 @@ static ssize_t tool_spadfn_read(struct tool_ctx *tc, char __user *ubuf,
if (!spad_read_fn)
return -EINVAL;
- buf_size = min_t(size_t, size, 0x100);
+ spad_count = ntb_spad_count(tc->ntb);
+
+ /*
+ * We multiply the number of spads by 15 to get the buffer size
+ * this is from 3 for the %d, 10 for the largest hex value
+ * (0x00000000) and 2 for the tab and line feed.
+ */
+ buf_size = min_t(size_t, size, spad_count * 15);
buf = kmalloc(buf_size, GFP_KERNEL);
if (!buf)
@@ -247,7 +254,6 @@ static ssize_t tool_spadfn_read(struct tool_ctx *tc, char __user *ubuf,
pos = 0;
- spad_count = ntb_spad_count(tc->ntb);
for (i = 0; i < spad_count; ++i) {
pos += scnprintf(buf + pos, buf_size - pos, "%d\t%#x\n",
i, spad_read_fn(tc->ntb, i));