Since both sw_start and sw_end are master indices, the number of
software masters should be sw_end - sw_start + 1, which the current
code gets wrong, calculating one less than the actual value.
With this patch, the correct number of masters would be showed in the
debug message.
Signed-off-by: Chunyan Zhang <zhang.chun...@linaro.org>
---
drivers/hwtracing/intel_th/sth.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/hwtracing/intel_th/sth.c b/drivers/hwtracing/intel_th/sth.c
index 56101c3..28917d7 100644
--- a/drivers/hwtracing/intel_th/sth.c
+++ b/drivers/hwtracing/intel_th/sth.c
@@ -173,7 +173,7 @@ static int intel_th_sw_init(struct sth_device *sth)
sth->stm.sw_start = reg & 0xffff;
sth->stm.sw_end = reg >> 16;
- sth->sw_nmasters = sth->stm.sw_end - sth->stm.sw_start;
+ sth->sw_nmasters = sth->stm.sw_end - sth->stm.sw_start + 1;
dev_dbg(sth->dev, "sw_start: %x sw_end: %x masters: %x nchannels: %x\n",
sth->stm.sw_start, sth->stm.sw_end, sth->sw_nmasters,
sth->stm.sw_nchannels);
--
1.9.1
