linux-kernel - Re: [net-next PATCH 2/2] mlxsw: spectrum_kvdl: avoid uninitialized variable warning

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Message-Id: <20180226.113329.1873010713546052461.davem@davemloft.net>
Date:   Mon, 26 Feb 2018 11:33:29 -0500 (EST)
From:   David Miller <davem@...emloft.net>
To:     arnd@...db.de
Cc:     arkadis@...lanox.com, jiri@...lanox.com, idosch@...lanox.com,
        weiyongjun1@...wei.com, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [net-next PATCH 2/2] mlxsw: spectrum_kvdl: avoid uninitialized
 variable warning

From: Arnd Bergmann <arnd@...db.de>
Date: Fri, 23 Feb 2018 14:15:32 +0100

> gcc warns that 'resource_id' is not initialized if we don't come though
> any of the three 'case' statements before:
> 
> drivers/net/ethernet/mellanox/mlxsw/spectrum_kvdl.c: In function 'mlxsw_sp_kvdl_part_init':
> drivers/net/ethernet/mellanox/mlxsw/spectrum_kvdl.c:275:8: error: 'resource_id' may be used uninitialized in this function [-Werror=maybe-uninitialized]
> 
> In the current code, that won't happen, but it's more robust to explicitly
> handle this by returning a failure from mlxsw_sp_kvdl_part_init.
> 
> Fixes: 887839e6960d ("mlxsw: spectrum_kvdl: Add support for dynamic partition set")
> Signed-off-by: Arnd Bergmann <arnd@...db.de>

Applied.