linux-kernel - Re: [PATCH] scsi: aic7xxx: Fix unintentional sign extension issue on left shift of u8

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Message-ID: <yq1v965s7ln.fsf@ca-mkp.ca.oracle.com>
Date:   Tue, 22 Jun 2021 21:17:06 -0400
From:   "Martin K. Petersen" <martin.petersen@...cle.com>
To:     Colin King <colin.king@...onical.com>
Cc:     Hannes Reinecke <hare@...e.com>,
        "James E . J . Bottomley" <jejb@...ux.ibm.com>,
        "Martin K . Petersen" <martin.petersen@...cle.com>,
        linux-scsi@...r.kernel.org, kernel-janitors@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] scsi: aic7xxx: Fix unintentional sign extension issue
 on left shift of u8


Colin,

> The shifting of the u8 integer returned fom ahc_inb(ahc, port+3) by 24
> bits to the left will be promoted to a 32 bit signed int and then
> sign-extended to a u64.

Applied to 5.14/scsi-staging, thanks!

-- 
Martin K. Petersen	Oracle Linux Engineering