[PATCH for v4.9 LTS 19/87] spi: dw: Make debugfs name unique between instances

[Levin, Alexander (Sasha Levin)]

From: Phil Reid <preid@xxxxxxxxxxxxxxxxx>

[ Upstream commit 13288bdf4adbaa6bd1267f10044c1bc25d90ce7f ]

Some system have multiple dw devices. Currently the driver uses a
fixed name for the debugfs dir. Append dev name to the debugfs dir
name to make it unique.

Signed-off-by: Phil Reid <preid@xxxxxxxxxxxxxxxxx>
Signed-off-by: Mark Brown <broonie@xxxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxx>
---
 drivers/spi/spi-dw.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/spi/spi-dw.c b/drivers/spi/spi-dw.c
index 27960e46135d..c4226c07e091 100644
--- a/drivers/spi/spi-dw.c
+++ b/drivers/spi/spi-dw.c
@@ -107,7 +107,10 @@ static const struct file_operations dw_spi_regs_ops = {
 
 static int dw_spi_debugfs_init(struct dw_spi *dws)
 {
-	dws->debugfs = debugfs_create_dir("dw_spi", NULL);
+	char name[128];
+
+	snprintf(name, 128, "dw_spi-%s", dev_name(&dws->master->dev));
+	dws->debugfs = debugfs_create_dir(name, NULL);
 	if (!dws->debugfs)
 		return -ENOMEM;
 
-- 
2.11.0