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From: Greg KH <greg@kroah.com>
To: Suganath Prabu <suganath-prabu.subramani@broadcom.com>
Cc: stable@vger.kernel.org, sreekanth.reddy@broadcom.com
Subject: Re: [PATCH RESEND] mpt3sas: Use 63-bit DMA addressing on SAS35 HBA
Date: Fri, 16 Aug 2019 11:46:50 +0200
Message-ID: <20190816094650.GA10743@kroah.com> (raw)
In-Reply-To: <1565086396-44714-1-git-send-email-suganath-prabu.subramani@broadcom.com>

On Tue, Aug 06, 2019 at 06:13:16AM -0400, Suganath Prabu wrote:
> From: Suganath Prabu S <suganath-prabu.subramani@broadcom.com>
> 
> Although SAS3 & SAS3.5 IT HBA controllers support
> 64-bit DMA addressing, as per hardware design,
> if DMA able range contains all 64-bits set (0xFFFFFFFF-FFFFFFFF) then
> it results in a firmware fault.
> 
> e.g. SGE's start address is 0xFFFFFFFF-FFFF000 and
> data length is 0x1000 bytes. when HBA tries to DMA the data
> at 0xFFFFFFFF-FFFFFFFF location then HBA will
> fault the firmware.
> 
> Fix:
> Driver will set 63-bit DMA mask to ensure the above address
> will not be used.
> 
> Cc: <stable@vger.kernel.org> # 4.4.186, # 4.9.186 # 4.14.136
> Signed-off-by: Suganath Prabu S <suganath-prabu.subramani@broadcom.com>
> ---
> RESEND: Resending this patch to include 4.14.136 stable kernel.
> 
> This Patch is for stable kernels 4.4.186, 4.9.186 and 4.14.136.
> Original patch is applied to 5.3/scsi-fixes.
> commit ID:  df9a606184bfdb5ae3ca9d226184e9489f5c24f7

Now queued up, thanks.

greg k-h

      reply index

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-08-06 10:13 Suganath Prabu
2019-08-16  9:46 ` Greg KH [this message]

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