spi: dw: Make debugfs name unique between instances

BugLink: http://bugs.launchpad.net/bugs/1710646
[ 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@electromag.com.au>
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Stefan Bader <stefan.bader@canonical.com>
Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@canonical.com>

diff --git a/drivers/spi/spi-dw.c b/drivers/spi/spi-dw.c
index 882cd6618cd5d0f1225eb6a8e7bbd66d80882f01..87a0e47eeae64524714f71e3afddd1daa61f2d4d 100644 (file)
--- 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;