mmc: jz4740: don't treat NULL clk as an error

clk_get() returns a struct clk cookie to the driver and some platforms
may return NULL if they only support a single clock.  clk_get() has only
failed if it returns a ERR_PTR() encoded pointer.

Signed-off-by: Jamie Iles <jamie@jamieiles.com>
Signed-off-by: Chris Ball <cjb@laptop.org>

diff --git a/drivers/mmc/host/jz4740_mmc.c b/drivers/mmc/host/jz4740_mmc.c
index b3a0ab0e4c2b6ce37ed2ff68321c154e45d5c1f0..74218ad677e4955d2dcb0941f68ed45c3fa4e85b 100644 (file)
--- a/drivers/mmc/host/jz4740_mmc.c
+++ b/drivers/mmc/host/jz4740_mmc.c
@@ -14,6 +14,7 @@
  */
 
 #include <linux/mmc/host.h>
+#include <linux/err.h>
 #include <linux/io.h>
 #include <linux/irq.h>
 #include <linux/interrupt.h>
@@ -827,8 +828,8 @@ static int __devinit jz4740_mmc_probe(struct platform_device* pdev)
        }
 
        host->clk = clk_get(&pdev->dev, "mmc");
-       if (!host->clk) {
-               ret = -ENOENT;
+       if (IS_ERR(host->clk)) {
+               ret = PTR_ERR(host->clk);
                dev_err(&pdev->dev, "Failed to get mmc clock\n");
                goto err_free_host;
        }