regulator_enable() is declared with __must_check attribute.
Hence check the return value to ensure that the regulator is enabled.
Fixes the following warning:
drivers/mmc/host/dw_mmc.c:2461:19: warning:
ignoring return value of ‘regulator_enable’, declared with attribute
warn_unused_result [-Wunused-result]
drivers/mmc/host/dw_mmc.c: In function ‘dw_mci_init_slot’:
drivers/mmc/host/dw_mmc.c:1994:19: warning:
ignoring return value of ‘regulator_enable’, declared with attribute
warn_unused_result [-Wunused-result]
Signed-off-by: Sachin Kamat <sachin.kamat@xxxxxxxxxx>
Acked-by: Jaehoon Chung <jh80.chung@xxxxxxxxxxx>
---
Changes since v1:
Changed 'if (ret != 0)' to 'if (ret)'
---
drivers/mmc/host/dw_mmc.c | 20 ++++++++++++++++----
1 file changed, 16 insertions(+), 4 deletions(-)
diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c
index a443820..4e3ebff 100644
--- a/drivers/mmc/host/dw_mmc.c
+++ b/drivers/mmc/host/dw_mmc.c
@@ -1990,8 +1990,14 @@ static int dw_mci_init_slot(struct dw_mci *host, unsigned int id)
if (IS_ERR(host->vmmc)) {
pr_info("%s: no vmmc regulator found\n", mmc_hostname(mmc));
host->vmmc = NULL;
- } else
- regulator_enable(host->vmmc);
+ } else {
+ ret = regulator_enable(host->vmmc);
+ if (ret) {
+ dev_err(host->dev,
+ "failed to enable regulator: %d\n", ret);
+ goto err_setup_bus;
+ }
+ }
if (dw_mci_get_cd(mmc))
set_bit(DW_MMC_CARD_PRESENT, &slot->flags);
@@ -2457,8 +2463,14 @@ int dw_mci_resume(struct dw_mci *host)
{
int i, ret;
- if (host->vmmc)
- regulator_enable(host->vmmc);
+ if (host->vmmc) {
+ ret = regulator_enable(host->vmmc);
+ if (ret) {
+ dev_err(host->dev,
+ "failed to enable regulator: %d\n", ret);
+ return ret;
+ }
+ }
if (!mci_wait_reset(host->dev, host)) {
ret = -ENODEV;
--
1.7.9.5
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