linux-kernel - [PATCH] scsi: elx: efct: Eliminate unnecessary boolean check in efct_hw_command

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Date:   Wed, 16 Jun 2021 23:31:23 -0700
From:   Nathan Chancellor <nathan@...nel.org>
To:     James Smart <james.smart@...adcom.com>,
        Ram Vegesna <ram.vegesna@...adcom.com>,
        "James E.J. Bottomley" <jejb@...ux.ibm.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>
Cc:     Nick Desaulniers <ndesaulniers@...gle.com>,
        linux-scsi@...r.kernel.org, target-devel@...r.kernel.org,
        linux-kernel@...r.kernel.org, clang-built-linux@...glegroups.com,
        Nathan Chancellor <nathan@...nel.org>
Subject: [PATCH] scsi: elx: efct: Eliminate unnecessary boolean check in efct_hw_command_cancel()

clang warns:

drivers/scsi/elx/efct/efct_hw.c:1523:17: warning: address of array
'ctx->buf' will always evaluate to 'true' [-Wpointer-bool-conversion]
                              (!ctx->buf ? U32_MAX : *((u32 *)ctx->buf)));
                               ~~~~~~^~~

buf is an array in the middle of a struct so deferencing it is not a
problem as long as ctx is not NULL. Eliminate the check, which fixes the
warning.

Fixes: 580c0255e4ef ("scsi: elx: efct: RQ buffer, memory pool allocation and deallocation APIs")
Link: https://github.com/ClangBuiltLinux/linux/issues/1398
Signed-off-by: Nathan Chancellor <nathan@...nel.org>
---
 drivers/scsi/elx/efct/efct_hw.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/scsi/elx/efct/efct_hw.c b/drivers/scsi/elx/efct/efct_hw.c
index ce4736c41564..5b508d49e5a5 100644
--- a/drivers/scsi/elx/efct/efct_hw.c
+++ b/drivers/scsi/elx/efct/efct_hw.c
@@ -1519,8 +1519,7 @@ efct_hw_command_cancel(struct efct_hw *hw)
 				       struct efct_command_ctx, list_entry);
 
 		efc_log_debug(hw->os, "hung command %08x\n",
-			      !ctx ? U32_MAX :
-			      (!ctx->buf ? U32_MAX : *((u32 *)ctx->buf)));
+			      !ctx ? U32_MAX : *((u32 *)ctx->buf));
 		spin_unlock_irqrestore(&hw->cmd_lock, flags);
 		rc = efct_hw_command_process(hw, -1, mqe, SLI4_BMBX_SIZE);
 		spin_lock_irqsave(&hw->cmd_lock, flags);

base-commit: ebc076b3eddc807729bd81f7bc48e798a3ddc477
-- 
2.32.0.93.g670b81a890