linux-kernel - Coverity: gpmc_is_valid_waitpin(): Control flow issues

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Date:   Fri, 4 Nov 2022 12:33:00 -0700
From:   coverity-bot <keescook@...omium.org>
To:     Benedikt Niedermayr <benedikt.niedermayr@...mens.com>
Cc:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        linux-kernel@...r.kernel.org, Tony Lindgren <tony@...mide.com>,
        Roger Quadros <rogerq@...nel.org>, linux-omap@...r.kernel.org,
        "Gustavo A. R. Silva" <gustavo@...eddedor.com>,
        linux-next@...r.kernel.org, linux-hardening@...r.kernel.org
Subject: Coverity: gpmc_is_valid_waitpin(): Control flow issues

Hello!

This is an experimental semi-automated report about issues detected by
Coverity from a scan of next-20221104 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:

  Wed Nov 2 10:02:39 2022 -0400
    89aed3cd5cb9 ("memory: omap-gpmc: wait pin additions")

Coverity reported the following:

*** CID 1527139:  Control flow issues  (NO_EFFECT)
drivers/memory/omap-gpmc.c:1048 in gpmc_is_valid_waitpin()
1042     	spin_unlock(&gpmc_mem_lock);
1043     }
1044     EXPORT_SYMBOL(gpmc_cs_free);
1045
1046     static bool gpmc_is_valid_waitpin(u32 waitpin)
1047     {
vvv     CID 1527139:  Control flow issues  (NO_EFFECT)
vvv     This greater-than-or-equal-to-zero comparison of an unsigned value is always true. "waitpin >= 0U".
1048     	return waitpin >= 0 && waitpin < gpmc_nr_waitpins;
1049     }
1050
1051     static int gpmc_alloc_waitpin(struct gpmc_device *gpmc,
1052     			      struct gpmc_settings *p)
1053     {

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 <keescook+coverity-bot@...omium.org>
Addresses-Coverity-ID: 1527139 ("Control flow issues")
Fixes: 89aed3cd5cb9 ("memory: omap-gpmc: wait pin additions")

Thanks for your attention!

-- 
Coverity-bot