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authorAndrey Smirnov <andrew.smirnov@gmail.com>2019-08-12 13:08:46 -0700
committerWim Van Sebroeck <wim@linux-watchdog.org>2019-09-17 08:59:03 +0200
commit4a9600c7e735c343cf723bf4a97bfb0435748e20 (patch)
tree26a606ca96f452d2c21b63606bef68708a96c658 /drivers/watchdog
parent670e51b0301e844d53da7e0a37c5063cdab81876 (diff)
watchdog: ziirave_wdt: Be verbose about errors in probe()
The driver is quite silent in case of probe failure, which makes it more difficult to diagnose problem from the kernel log. Add logging to all of the silent error paths ziirave_wdt_probe() to improve that. Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com> Cc: Chris Healy <cphealy@gmail.com> Cc: Guenter Roeck <linux@roeck-us.net> Cc: Rick Ramstetter <rick@anteaterllc.com> Cc: linux-watchdog@vger.kernel.org Cc: linux-kernel@vger.kernel.org Reviewed-by: Guenter Roeck <linux@roeck-us.net> Link: https://lore.kernel.org/r/20190812200906.31344-3-andrew.smirnov@gmail.com Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
Diffstat (limited to 'drivers/watchdog')
-rw-r--r--drivers/watchdog/ziirave_wdt.c32
1 files changed, 24 insertions, 8 deletions
diff --git a/drivers/watchdog/ziirave_wdt.c b/drivers/watchdog/ziirave_wdt.c
index 6ec028fb2635..8c71341a9c1c 100644
--- a/drivers/watchdog/ziirave_wdt.c
+++ b/drivers/watchdog/ziirave_wdt.c
@@ -658,8 +658,10 @@ static int ziirave_wdt_probe(struct i2c_client *client,
*/
if (w_priv->wdd.timeout == 0) {
val = i2c_smbus_read_byte_data(client, ZIIRAVE_WDT_TIMEOUT);
- if (val < 0)
+ if (val < 0) {
+ dev_err(&client->dev, "Failed to read timeout\n");
return val;
+ }
if (val < ZIIRAVE_TIMEOUT_MIN)
return -ENODEV;
@@ -668,8 +670,10 @@ static int ziirave_wdt_probe(struct i2c_client *client,
} else {
ret = ziirave_wdt_set_timeout(&w_priv->wdd,
w_priv->wdd.timeout);
- if (ret)
+ if (ret) {
+ dev_err(&client->dev, "Failed to set timeout\n");
return ret;
+ }
dev_info(&client->dev, "Timeout set to %ds\n",
w_priv->wdd.timeout);
@@ -681,34 +685,46 @@ static int ziirave_wdt_probe(struct i2c_client *client,
/* If in unconfigured state, set to stopped */
val = i2c_smbus_read_byte_data(client, ZIIRAVE_WDT_STATE);
- if (val < 0)
+ if (val < 0) {
+ dev_err(&client->dev, "Failed to read state\n");
return val;
+ }
if (val == ZIIRAVE_STATE_INITIAL)
ziirave_wdt_stop(&w_priv->wdd);
ret = ziirave_wdt_init_duration(client);
- if (ret)
+ if (ret) {
+ dev_err(&client->dev, "Failed to init duration\n");
return ret;
+ }
ret = ziirave_wdt_revision(client, &w_priv->firmware_rev,
ZIIRAVE_WDT_FIRM_VER_MAJOR);
- if (ret)
+ if (ret) {
+ dev_err(&client->dev, "Failed to read firmware version\n");
return ret;
+ }
ret = ziirave_wdt_revision(client, &w_priv->bootloader_rev,
ZIIRAVE_WDT_BOOT_VER_MAJOR);
- if (ret)
+ if (ret) {
+ dev_err(&client->dev, "Failed to read bootloader version\n");
return ret;
+ }
w_priv->reset_reason = i2c_smbus_read_byte_data(client,
ZIIRAVE_WDT_RESET_REASON);
- if (w_priv->reset_reason < 0)
+ if (w_priv->reset_reason < 0) {
+ dev_err(&client->dev, "Failed to read reset reason\n");
return w_priv->reset_reason;
+ }
if (w_priv->reset_reason >= ARRAY_SIZE(ziirave_reasons) ||
- !ziirave_reasons[w_priv->reset_reason])
+ !ziirave_reasons[w_priv->reset_reason]) {
+ dev_err(&client->dev, "Invalid reset reason\n");
return -ENODEV;
+ }
ret = watchdog_register_device(&w_priv->wdd);