From 22e8860cf8f777fbf6a83f2fb7127f682a8e9de4 Mon Sep 17 00:00:00 2001 From: Kangjie Lu Date: Sun, 24 Mar 2019 18:18:56 -0500 Subject: net: ieee802154: fix missing checks for regmap_update_bits 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 Reviewed-by: Mukesh Ojha Signed-off-by: Stefan Schmidt --- drivers/net/ieee802154/mcr20a.c | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'drivers/net') 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; } -- cgit v1.2.3