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Date: Mon, 09 Mar 2015 17:26:57 +0100
From: Paolo Bonzini <pbonzini@redhat.com>
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Subject: Re: [Qemu-devel] [PATCH] iscsi: Fix check for username
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To: Stefan Weil <sw@weilnetz.de>, QEMU Trivial <qemu-trivial@nongnu.org>
Cc: Kevin Wolf <kwolf@redhat.com>, Stefan Hajnoczi <stefanha@redhat.com>, Peter Lieven <pl@kamp.de>, QEMU Developer <qemu-devel@nongnu.org>, Ronnie Sahlberg <ronniesahlberg@gmail.com>



On 07/03/2015 10:14, Stefan Weil wrote:
> The variable user in struct iscsi_url is a character array, not a pointer.
> Therefore its address will never be NULL.
> 
> clang reports this error:
> 
> block/iscsi.c:1329:20: warning:
>  comparison of array 'iscsi_url->user' not equal to a null pointer
>  is always true [-Wtautological-pointer-compare]
> 
> Signed-off-by: Stefan Weil <sw@weilnetz.de>
> ---
> 
> This error also exists in libscsi. See my pull request
> https://github.com/sahlberg/libiscsi/pull/146
> 
> Cheers
> Stefan
> 
>  block/iscsi.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/block/iscsi.c b/block/iscsi.c
> index 1fa855a..a2bd70a 100644
> --- a/block/iscsi.c
> +++ b/block/iscsi.c
> @@ -1326,7 +1326,7 @@ static int iscsi_open(BlockDriverState *bs, QDict *options, int flags,
>          goto out;
>      }
>  
> -    if (iscsi_url->user != NULL) {
> +    if (iscsi_url->user[0] != '\0') {
>          ret = iscsi_set_initiator_username_pwd(iscsi, iscsi_url->user,
>                                                iscsi_url->passwd);
>          if (ret != 0) {
> 

Applied, thanks.

Paolo