linux-kernel - [RFC PATCH 13/13] scsi: mpt3sas: comment about invalid usage of the list iterator

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Date:   Thu, 17 Feb 2022 19:48:29 +0100
From:   Jakob Koschel <jakobkoschel@...il.com>
To:     Linus Torvalds <torvalds@...ux-foundation.org>,
        linux-kernel@...r.kernel.org
Cc:     linux-arch@...r.kernel.org,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Arnd Bergman <arnd@...db.de>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Kees Cook <keescook@...omium.org>,
        Mike Rapoport <rppt@...nel.org>,
        "Gustavo A. R. Silva" <gustavo@...eddedor.com>,
        Brian Johannesmeyer <bjohannesmeyer@...il.com>,
        Cristiano Giuffrida <c.giuffrida@...nl>,
        "Bos, H.J." <h.j.bos@...nl>, Jakob Koschel <jakobkoschel@...il.com>
Subject: [RFC PATCH 13/13] scsi: mpt3sas: comment about invalid usage of the list iterator

Since the list iteration never exists early, reply_q is guaranteed to
be an invalid variable and should not be used within
_base_process_reply_queue(). Since I'm not sure what this code was
supposed to do, I just marked this with this comment.

Signed-off-by: Jakob Koschel <jakobkoschel@...il.com>
---
 drivers/scsi/mpt3sas/mpt3sas_base.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/scsi/mpt3sas/mpt3sas_base.c b/drivers/scsi/mpt3sas/mpt3sas_base.c
index 511726f92d9a..a6746e124226 100644
--- a/drivers/scsi/mpt3sas/mpt3sas_base.c
+++ b/drivers/scsi/mpt3sas/mpt3sas_base.c
@@ -2013,7 +2013,7 @@ mpt3sas_base_sync_reply_irqs(struct MPT3SAS_ADAPTER *ioc, u8 poll)
 		}
 	}
 	if (poll)
-		_base_process_reply_queue(reply_q);
+		_base_process_reply_queue(reply_q); // COMMENT
 }
 
 /**
-- 
2.25.1