From f5942db5ef25531d53f2aa2ff84a46e1763b4196 Mon Sep 17 00:00:00 2001 From: Steve French Date: Wed, 14 Nov 2018 01:37:39 -0600 Subject: [PATCH] cifs: smb2 commands can not be negative, remove confusing check As Coverity points out le16_to_cpu(midEntry->Command) can not be less than zero. Detected by CoverityScan, CID#1438650 ("Macro compares unsigned to 0") Signed-off-by: Steve French Reviewed-by: Ronnie Sahlberg --- fs/cifs/transport.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/fs/cifs/transport.c b/fs/cifs/transport.c index 83ff0c25710d..5be7302853b6 100644 --- a/fs/cifs/transport.c +++ b/fs/cifs/transport.c @@ -126,9 +126,11 @@ DeleteMidQEntry(struct mid_q_entry *midEntry) if ((slow_rsp_threshold != 0) && time_after(now, midEntry->when_alloc + (slow_rsp_threshold * HZ)) && (midEntry->command != command)) { - /* smb2slowcmd[NUMBER_OF_SMB2_COMMANDS] counts by command */ - if ((le16_to_cpu(midEntry->command) < NUMBER_OF_SMB2_COMMANDS) && - (le16_to_cpu(midEntry->command) >= 0)) + /* + * smb2slowcmd[NUMBER_OF_SMB2_COMMANDS] counts by command + * NB: le16_to_cpu returns unsigned so can not be negative below + */ + if (le16_to_cpu(midEntry->command) < NUMBER_OF_SMB2_COMMANDS) cifs_stats_inc(&midEntry->server->smb2slowcmd[le16_to_cpu(midEntry->command)]); trace_smb3_slow_rsp(le16_to_cpu(midEntry->command),