linux-kernel - Re: [PATCH] scsi: lpfc: fix lpfc

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Date:   Wed, 28 Jun 2023 22:41:27 -0400
From:   "Martin K. Petersen" <martin.petersen@...cle.com>
To:     James Smart <james.smart@...adcom.com>,
        Dick Kennedy <dick.kennedy@...adcom.com>,
        "James E.J. Bottomley" <jejb@...ux.ibm.com>,
        Arnd Bergmann <arnd@...nel.org>
Cc:     "Martin K . Petersen" <martin.petersen@...cle.com>,
        Arnd Bergmann <arnd@...db.de>,
        Nathan Chancellor <nathan@...nel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Tom Rix <trix@...hat.com>,
        Justin Tee <justin.tee@...adcom.com>,
        Kees Cook <keescook@...omium.org>,
        "Gustavo A. R. Silva" <gustavoars@...nel.org>,
        linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org,
        llvm@...ts.linux.dev
Subject: Re: [PATCH] scsi: lpfc: fix lpfc_name struct packing

On Fri, 16 Jun 2023 11:06:56 +0200, Arnd Bergmann wrote:

> clang points out that the lpfc_name structure has an 8-byte alignement requirement
> on most architectures, but is embedded in a number of other structures that are
> forced to be only 1-byte aligned:
> 
> drivers/scsi/lpfc/lpfc_hw.h:1516:30: error: field pe within 'struct lpfc_fdmi_reg_port_list' is less aligned than 'struct lpfc_fdmi_port_entry' and is usually due to 'struct lpfc_fdmi_reg_port_list' being packed, which can lead to unaligned accesses [-Werror,-Wunaligned-access]
>         struct lpfc_fdmi_port_entry pe;
> drivers/scsi/lpfc/lpfc_hw.h:850:19: error: field portName within 'struct _ADISC' is less aligned than 'struct lpfc_name' and is usually due to 'struct _ADISC' being packed, which can lead to unaligned accesses [-Werror,-Wunaligned-access]
> drivers/scsi/lpfc/lpfc_hw.h:851:19: error: field nodeName within 'struct _ADISC' is less aligned than 'struct lpfc_name' and is usually due to 'struct _ADISC' being packed, which can lead to unaligned accesses [-Werror,-Wunaligned-access]
> drivers/scsi/lpfc/lpfc_hw.h:922:19: error: field portName within 'struct _RNID' is less aligned than 'struct lpfc_name' and is usually due to 'struct _RNID' being packed, which can lead to unaligned accesses [-Werror,-Wunaligned-access]
> drivers/scsi/lpfc/lpfc_hw.h:923:19: error: field nodeName within 'struct _RNID' is less aligned than 'struct lpfc_name' and is usually due to 'struct _RNID' being packed, which can lead to unaligned accesses [-Werror,-Wunaligned-access]
> 
> [...]

Applied to 6.5/scsi-queue, thanks!

[1/1] scsi: lpfc: fix lpfc_name struct packing
      https://git.kernel.org/mkp/scsi/c/00c2cae6b66a

-- 
Martin K. Petersen	Oracle Linux Engineering