[PATCH 4.4 64/91] spi: dw: Make debugfs name unique between instances

[Greg Kroah-Hartman]

4.4-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Phil Reid <pr...@electromag.com.au>


[ 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 <pr...@electromag.com.au>
Signed-off-by: Mark Brown <broo...@kernel.org>
Signed-off-by: Sasha Levin <alexander.le...@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
 drivers/spi/spi-dw.c |    5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

--- a/drivers/spi/spi-dw.c
+++ b/drivers/spi/spi-dw.c
@@ -107,7 +107,10 @@ static const struct file_operations dw_s
 
 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;