spi: dw: Make debugfs use bus num and make irq name unique

Instead of using device name it was suggested that bus number was more
appropriate to differentiate debugfs names. Also reduce buffer size to
more realistic 32 bytes instead of 128.

When request_irq is called the bus number may not be assigned. Therefore
the irq name was not unique when dynamic bus number was being used.
As per most of the spi drivers use the device name instead. No other
use of dws->name could be found so it was removed.

Signed-off-by: Phil Reid <preid@electromag.com.au>
Signed-off-by: Mark Brown <broonie@kernel.org>

2 files changed, 4 insertions, 5 deletions

diff --git a/drivers/spi/spi-dw.c b/drivers/spi/spi-dw.c
index 054012f87567..b217c22ff72f 100644
--- a/drivers/spi/spi-dw.c
+++ b/drivers/spi/spi-dw.c
@@ -107,9 +107,9 @@ static const struct file_operations dw_spi_regs_ops = {
 
 static int dw_spi_debugfs_init(struct dw_spi *dws)
 {
-        char name[128];
+        char name[32];
 
-        snprintf(name, 128, "dw_spi-%s", dev_name(&dws->master->dev));
+        snprintf(name, 32, "dw_spi%d", dws->master->bus_num);
         dws->debugfs = debugfs_create_dir(name, NULL);
         if (!dws->debugfs)
                 return -ENOMEM;
@@ -486,9 +486,9 @@ int dw_spi_add_host(struct device *dev, struct dw_spi *dws)
         dws->type = SSI_MOTO_SPI;
         dws->dma_inited = 0;
         dws->dma_addr = (dma_addr_t)(dws->paddr + DW_SPI_DR);
-        snprintf(dws->name, sizeof(dws->name), "dw_spi%d", dws->bus_num);
 
-        ret = request_irq(dws->irq, dw_spi_irq, IRQF_SHARED, dws->name, master);
+        ret = request_irq(dws->irq, dw_spi_irq, IRQF_SHARED, dev_name(dev),
+                          master);
         if (ret < 0) {
                 dev_err(dev, "can not get IRQ\n");
                 goto err_free_master;
diff --git a/drivers/spi/spi-dw.h b/drivers/spi/spi-dw.h
index c21ca02f8ec5..da5eab62df34 100644
--- a/drivers/spi/spi-dw.h
+++ b/drivers/spi/spi-dw.h
@@ -101,7 +101,6 @@ struct dw_spi_dma_ops {
 struct dw_spi {
         struct spi_master       *master;
         enum dw_ssi_type        type;
-        char                    name[16];
 
         void __iomem            *regs;
         unsigned long           paddr;