[PATCH v4 2/7] mmc: sdhci: Change prototype of set_delay to return errors

[Ashok Reddy Soma]

set_delay() has return type as void. If there are any errors while
setting tapdelay's it won't be able to return them.

Change the prototype of set_delay() in sdhci_ops structure and return
the errors from wherever it is called.

Signed-off-by: Ashok Reddy Soma <ashok.reddy.s...@xilinx.com>
Reviewed-by: Jaehoon Chung <jh80.ch...@samsung.com>
---

(no changes since v2)

Changes in v2:
 - This is the second patch that has been split from 1/7
 - This covers changes for sdhci driver separately
 - Added a debug print in case of error from set_delay()

 drivers/mmc/sdhci.c | 10 ++++++++--
 include/sdhci.h     |  2 +-
 2 files changed, 9 insertions(+), 3 deletions(-)

diff --git a/drivers/mmc/sdhci.c b/drivers/mmc/sdhci.c
index d9ab6a0a83..a99014236a 100644
--- a/drivers/mmc/sdhci.c
+++ b/drivers/mmc/sdhci.c
@@ -366,6 +366,7 @@ int sdhci_set_clock(struct mmc *mmc, unsigned int clock)
 {
        struct sdhci_host *host = mmc->priv;
        unsigned int div, clk = 0, timeout;
+       int ret;
 
        /* Wait max 20 ms */
        timeout = 200;
@@ -386,8 +387,13 @@ int sdhci_set_clock(struct mmc *mmc, unsigned int clock)
        if (clock == 0)
                return 0;
 
-       if (host->ops && host->ops->set_delay)
-               host->ops->set_delay(host);
+       if (host->ops && host->ops->set_delay) {
+               ret = host->ops->set_delay(host);
+               if (ret) {
+                       printf("%s: Error while setting tap delay\n", __func__);
+                       return ret;
+               }
+       }
 
        if (SDHCI_GET_VERSION(host) >= SDHCI_SPEC_300) {
                /*
diff --git a/include/sdhci.h b/include/sdhci.h
index 0ae9471ad7..44a0d84e5a 100644
--- a/include/sdhci.h
+++ b/include/sdhci.h
@@ -268,7 +268,7 @@ struct sdhci_ops {
        int     (*set_ios_post)(struct sdhci_host *host);
        void    (*set_clock)(struct sdhci_host *host, u32 div);
        int (*platform_execute_tuning)(struct mmc *host, u8 opcode);
-       void (*set_delay)(struct sdhci_host *host);
+       int (*set_delay)(struct sdhci_host *host);
        int     (*deferred_probe)(struct sdhci_host *host);
 };
 
-- 
2.17.1