[PATCH v2 1/3] drivers: ufs: handle return values of ufs_hba_ops callbacks

[Julien Stephan]

The return values of ufshcd_ops_link_startup_notify(),
ufshcd_ops_hce_enable_notify(), ufshcd_ops_init(), and
ufshcd_device_reset() are currently ignored.

Check and propagate these return values properly and emit appropriate
error messages on error.

While at it, remove the ufshcd_device_reset() wrapper, which just call
ufshcd_device_reset().

Signed-off-by: Julien Stephan <jstep...@baylibre.com>
---
 drivers/ufs/ufs-uclass.c | 36 ++++++++++++++++++++++++++----------
 1 file changed, 26 insertions(+), 10 deletions(-)

diff --git a/drivers/ufs/ufs-uclass.c b/drivers/ufs/ufs-uclass.c
index 3c8e4299259..c09f61aa420 100644
--- a/drivers/ufs/ufs-uclass.c
+++ b/drivers/ufs/ufs-uclass.c
@@ -127,11 +127,6 @@ static void ufshcd_print_pwr_info(struct ufs_hba *hba)
                hba->pwr_info.hs_rate);
 }
 
-static void ufshcd_device_reset(struct ufs_hba *hba)
-{
-       ufshcd_vops_device_reset(hba);
-}
-
 /**
  * ufshcd_ready_for_uic_cmd - Check if controller is ready
  *                            to accept UIC commands
@@ -512,7 +507,9 @@ static int ufshcd_link_startup(struct ufs_hba *hba)
        int retries = DME_LINKSTARTUP_RETRIES;
 
        do {
-               ufshcd_ops_link_startup_notify(hba, PRE_CHANGE);
+               ret = ufshcd_ops_link_startup_notify(hba, PRE_CHANGE);
+               if (ret)
+                       goto out;
 
                ret = ufshcd_dme_link_startup(hba);
 
@@ -598,12 +595,18 @@ static inline void ufshcd_hba_start(struct ufs_hba *hba)
 static int ufshcd_hba_enable(struct ufs_hba *hba)
 {
        int retry;
+       int ret;
 
        if (!ufshcd_is_hba_active(hba))
                /* change controller state to "reset state" */
                ufshcd_hba_stop(hba);
 
-       ufshcd_ops_hce_enable_notify(hba, PRE_CHANGE);
+       ret = ufshcd_ops_hce_enable_notify(hba, PRE_CHANGE);
+       if (ret) {
+               dev_err(hba->dev, "Controller enable notify PRE_CHANGE failed: 
%i\n",
+                       ret);
+               return ret;
+       }
 
        /* start controller initialization sequence */
        ufshcd_hba_start(hba);
@@ -635,7 +638,12 @@ static int ufshcd_hba_enable(struct ufs_hba *hba)
        /* enable UIC related interrupts */
        ufshcd_enable_intr(hba, UFSHCD_UIC_MASK);
 
-       ufshcd_ops_hce_enable_notify(hba, POST_CHANGE);
+       ret = ufshcd_ops_hce_enable_notify(hba, POST_CHANGE);
+       if (ret) {
+               dev_err(hba->dev, "Controller enable notify POST_CHANGE failed: 
%i\n",
+                       ret);
+               return ret;
+       }
 
        return 0;
 }
@@ -2182,7 +2190,11 @@ int ufshcd_probe(struct udevice *ufs_dev, struct 
ufs_hba_ops *hba_ops)
        /* Set descriptor lengths to specification defaults */
        ufshcd_def_desc_sizes(hba);
 
-       ufshcd_ops_init(hba);
+       err = ufshcd_ops_init(hba);
+       if (err) {
+               dev_err(hba->dev, "Host controller init failed: %i\n", err);
+               return err;
+       }
 
        /* Read capabilities registers */
        hba->capabilities = ufshcd_readl(hba, REG_CONTROLLER_CAPABILITIES);
@@ -2226,7 +2238,11 @@ int ufshcd_probe(struct udevice *ufs_dev, struct 
ufs_hba_ops *hba_ops)
        mb(); /* flush previous writes */
 
        /* Reset the attached device */
-       ufshcd_device_reset(hba);
+       err = ufshcd_vops_device_reset(hba);
+       if (err) {
+               dev_err(hba->dev, "Failed to reset attached device: %i\n", err);
+               return err;
+       }
 
        err = ufshcd_hba_enable(hba);
        if (err) {

-- 
2.52.0