On 3/25/2019 4:48 AM, Kangjie Lu wrote:
regmap_update_bits could fail and deserves a check.
The patch adds the checks and if it fails, returns its error
code upstream.
Signed-off-by: Kangjie Lu <kjlu@xxxxxxx>
Reviewed-by: Mukesh Ojha <mojha@xxxxxxxxxxxxxx>
-Mukesh
---
drivers/net/ieee802154/mcr20a.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/net/ieee802154/mcr20a.c b/drivers/net/ieee802154/mcr20a.c
index c589f5ae75bb..8bb53ec8d9cf 100644
--- a/drivers/net/ieee802154/mcr20a.c
+++ b/drivers/net/ieee802154/mcr20a.c
@@ -533,6 +533,8 @@ mcr20a_start(struct ieee802154_hw *hw)
dev_dbg(printdev(lp), "no slotted operation\n");
ret = regmap_update_bits(lp->regmap_dar, DAR_PHY_CTRL1,
DAR_PHY_CTRL1_SLOTTED, 0x0);
+ if (ret < 0)
+ return ret;
/* enable irq */
enable_irq(lp->spi->irq);
@@ -540,11 +542,15 @@ mcr20a_start(struct ieee802154_hw *hw)
/* Unmask SEQ interrupt */
ret = regmap_update_bits(lp->regmap_dar, DAR_PHY_CTRL2,
DAR_PHY_CTRL2_SEQMSK, 0x0);
+ if (ret < 0)
+ return ret;
/* Start the RX sequence */
dev_dbg(printdev(lp), "start the RX sequence\n");
ret = regmap_update_bits(lp->regmap_dar, DAR_PHY_CTRL1,
DAR_PHY_CTRL1_XCVSEQ_MASK, MCR20A_XCVSEQ_RX);
+ if (ret < 0)
+ return ret;
return 0;
}
