Subject: Coverity: cdns_torrent_derived_refclk_is_enabled(): Error handling issues

From: coverity-bot <[email-masked]>
Date: Wed, 31 Mar 2021 14:58:33 -0700

Hello!

This is an experimental semi-automated report about issues detected by
Coverity from a scan of next-20210331 as part of the linux-next scan project:
https://scan.coverity.com/projects/linux-next-weekly-scan

You're getting this email because you were associated with the identified
lines of code (noted below) that were touched by commits:

  None
    2cca0228f364 ("phy: cadence-torrent: Add support to drive refclk out")

Coverity reported the following:

*** CID 1503589:  Error handling issues  (CHECKED_RETURN)
/drivers/phy/cadence/phy-cadence-torrent.c: 1678 in cdns_torrent_derived_refclk_is_enabled()
1672
1673     static int cdns_torrent_derived_refclk_is_enabled(struct clk_hw *hw)
1674     {
1675     	struct cdns_torrent_derived_refclk *derived_refclk = to_cdns_torrent_derived_refclk(hw);
1676     	int val;
1677
vvv     CID 1503589:  Error handling issues  (CHECKED_RETURN)
vvv     Calling "regmap_field_read" without checking return value (as is done elsewhere 101 out of 117 times).
1678     	regmap_field_read(derived_refclk->phy_pipe_cmn_ctrl1_0, &val);
1679
1680     	return !!val;
1681     }
1682
1683     static const struct clk_ops cdns_torrent_derived_refclk_ops = {

If this is a false positive, please let us know so we can mark it as
such, or teach the Coverity rules to be smarter. If not, please make
sure fixes get into linux-next. :) For patches fixing this, please
include these lines (but double-check the "Fixes" first):

Reported-by: coverity-bot <[email-masked]>
Addresses-Coverity-ID: 1503589 ("Error handling issues")
Fixes: 2cca0228f364 ("phy: cadence-torrent: Add support to drive refclk out")

Thanks for your attention!

-- 
Coverity-bot