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a=rsa-sha256; c=relaxed/relaxed; d=nvidia.com; s=n1; t=1547482131; bh=Hho0bexQ0Le6MfmPACNhTD5m6Tyma+N1LaqmRui0WM0=; h=X-PGP-Universal:Date:From:To:CC:Subject:Message-ID:References: MIME-Version:In-Reply-To:X-NVConfidentiality:User-Agent: X-Originating-IP:X-ClientProxiedBy:Content-Type: Content-Disposition; b=cs6vHpZiji7SXIcN2FueDybgSToz6R4hpwkbq6GSdkDhQzBeGK9qH8ROvIgEzf787 X8J9FWUB6tctQOEc53b7T4nS7w/9pizSXMRhCaBn7jUsCbTCR9RmGzFssbYW1L3fZi 5rTTMcX8yqHw7K5jxhXDlU2KpFKxrVzlcMRnGGenrntWm7dqS9mU8ZLWK5y8n1hlAE 3yqxy4sE0BdQ5C7gEOQDjwlgyVCDgjmHtq9HInM7QMRO2RB/adKHzK2GyBunMtWLz/ 8g8xZDg5TJI+kzAIFQqnEpcJVvPj2jmPV3NqRONIjTq46dnsu4n0prFhIyF57gmSiB U4Ntgy5f2GzNA== X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190114_080908_404571_48E4AAD1 X-CRM114-Status: GOOD ( 12.16 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Bartlomiej Zolnierkiewicz , Russell King , linux-kernel@vger.kernel.org, Tobias Jakobi , iommu@lists.linux-foundation.org, Ben Skeggs , Robin Murphy , Christoph Hellwig , linux-arm-kernel@lists.infradead.org Content-Type: multipart/mixed; boundary="===============6279808918998879058==" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org --===============6279808918998879058== Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="CdrF4e02JqNVZeln" Content-Disposition: inline --CdrF4e02JqNVZeln Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Mon, Jan 14, 2019 at 02:22:40PM +0100, Marek Szyprowski wrote: > This reverts commit 1874619a7df4b14b23b14877e705ae15325773e3. >=20 > That patch broke IOMMU support for devices, which fails to probe for the > first time and use deferred probe approach. When non-NULL dma_ops is set > in arm_iommu_detach_device(), the given device later ignored by > arch_setup_dma_ops() and stays with non-IOMMU dma_ops. >=20 > Reported-by: Tobias Jakobi > Fixes: 1874619a7df4 "ARM: dma-mapping: Set proper DMA ops in arm_iommu_de= tach_device()" > Signed-off-by: Marek Szyprowski > --- > arch/arm/mm/dma-mapping.c | 12 ++++++------ > 1 file changed, 6 insertions(+), 6 deletions(-) Can you point out exactly what drivers break because of this change? We need to find a solution that works for everyone. Reverting is only marginally useful because somebody will just end up wanting to revert the revert because a different driver is now broken. Thierry --CdrF4e02JqNVZeln Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQIzBAABCAAdFiEEiOrDCAFJzPfAjcif3SOs138+s6EFAlw8tBsACgkQ3SOs138+ s6GvdA//W9RbyrwK0Z1YF6WLWPz/Vrii+8f8EHn/G8ZOdAmYNIJLbATdEhoF+3zo Fr6+hdn1ZOtXfyMMTXz63/c47xpiJVqpCj09vIt5qv7Mixu4xA90obTA227xDvVE 7ta1T3DXzMskYiUgqSQUceJh2MIHLjpF4yFtoAvsn4y9Uji7CkcVbaoCmRVy3fGJ rNGPBRSbbIR29Ox3fpECd+zf+9Ca4YhwD08+IuZ04vBO2JOnAh/gzephofRsYf/o uqkxLdRux2c5tvzJIkuovYrbSYKNCuB/2GMy+mDVdUVpKpuOeI+XnryipeaGLX1W wD+hXq7uJ63s6HEH7IkIb6s7TjZEhHmtYSA8vw5KWbGPj47t1Yr3P+aD4dZ5hOaU w9EhRJW3WKUgWH5jioTtXU9npYXwDfJG3+TKe+XNB2fQ6gOhttoch+lMggtgNEzK a85jKxcnXV7Xpo7UHz7KJGivug20QvAsYSipVjhn6CXBdIg6PEfOgOmAULhpX/O7 gQxUdeVhvW4N8WS4nkVMJ8Kudo8370WQ7gHW7kYSLE7ncksa17cbMegb3jq5dvax 9HygtnaTqdO8VlbdXghXU8C7X3z1eWeUJO2ZcedmsVPSRzJ4lfYxfK4ep/YsqS2q fgCBQmOzZV6JNPJNUZzeVedrIArWbr6DejaXff4LjfO/Y94Q7rA= =cziU -----END PGP SIGNATURE----- --CdrF4e02JqNVZeln-- --===============6279808918998879058== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel --===============6279808918998879058==--