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Mon, 5 Aug 2019 07:59:43 -0400 (EDT) Date: Mon, 5 Aug 2019 13:59:38 +0200 From: Greg KH To: Suganath Prabu Cc: stable@vger.kernel.org, sreekanth.reddy@broadcom.com, Sathya.Prakash@broadcom.com, kashyap.desai@broadcom.com Subject: Re: [PATCH] mpt3sas: Use 63-bit DMA addressing on SAS35 HBA Message-ID: <20190805115938.GD8189@kroah.com> References: <1564567129-9503-1-git-send-email-suganath-prabu.subramani@broadcom.com> <1564567129-9503-2-git-send-email-suganath-prabu.subramani@broadcom.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1564567129-9503-2-git-send-email-suganath-prabu.subramani@broadcom.com> User-Agent: Mutt/1.12.1 (2019-06-15) Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org On Wed, Jul 31, 2019 at 05:58:49AM -0400, Suganath Prabu wrote: > From: Suganath Prabu S > > 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: # 4.19.63 > Signed-off-by: Suganath Prabu S > --- > Note: > This Patch is for stable kernel 4.19.63. > Original patch is applied to 5.3/scsi-fixes. > commit ID: df9a606184bfdb5ae3ca9d226184e9489f5c24f7 Found this one. Now queued up,t hanks. greg k-h