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Bottomley" , "Martin K. Petersen" , Bean Huo , Can Guo Cc: linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org, stable@vger.kernel.org Date: Mon, 09 Feb 2026 15:51:50 +0100 In-Reply-To: <20260205-ufs-rpmb-v2-1-5e1572ee52bf@flipper.net> References: <20260205-ufs-rpmb-v2-1-5e1572ee52bf@flipper.net> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable User-Agent: Evolution 3.44.4-0ubuntu2.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 On Thu, 2026-02-05 at 12:30 +0400, Alexey Charkov wrote: > Older UFS spec devices (2.2 and earlier) do not expose per-region RPMB > sizes, as only one RPMB region is supported. In such cases, the size of > the single RPMB region can be deduced from the Logical Block Count and > Logical Block Size fields in the RPMB Unit Descriptor. >=20 > Add a fallback mechanism to calculate the RPMB region size from these > fields if the device implements an older spec, so that the RPMB driver > can work with such devices - otherwise it silently skips the whole RPMB. >=20 > =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 Section 14.1.4.6 (RPMB Unit De= scriptor) >=20 > Link: https://www.jedec.org/system/files/docs/JESD220C-2_2.pdf > Cc: stable@vger.kernel.org > Fixes: b06b8c421485 ("scsi: ufs: core: Add OP-TEE based RPMB driver for U= FS > devices") > Signed-off-by: Alexey Charkov Hi Alexey, please address Bart's suggestion in the next version, and add my reviewed t= ag. Reviewed-by: Bean Huo Kind regards, Bean