linux-kernel - [PATCH 4.6 088/203] iommu/rockchip: Fix zap cache during device attach

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Date:	Mon, 25 Jul 2016 13:55:03 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, John Keeping <john@...anate.com>,
	Heiko Stuebner <heiko@...ech.de>,
	Joerg Roedel <jroedel@...e.de>
Subject: [PATCH 4.6 088/203] iommu/rockchip: Fix zap cache during device attach

4.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: John Keeping <john@...anate.com>

commit ae8a7910fb0568531033bd6ebe65590f7a4fa6e2 upstream.

rk_iommu_command() takes a struct rk_iommu and iterates over the slave
MMUs, so this is doubly wrong in that we're passing in the wrong pointer
and talking to MMUs that we shouldn't be.

Fixes: cd6438c5f844 ("iommu/rockchip: Reconstruct to support multi slaves")
Signed-off-by: John Keeping <john@...anate.com>
Tested-by: Heiko Stuebner <heiko@...ech.de>
Reviewed-by: Heiko Stuebner <heiko@...ech.de>
Signed-off-by: Joerg Roedel <jroedel@...e.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/iommu/rockchip-iommu.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/iommu/rockchip-iommu.c
+++ b/drivers/iommu/rockchip-iommu.c
@@ -815,7 +815,7 @@ static int rk_iommu_attach_device(struct
 	dte_addr = virt_to_phys(rk_domain->dt);
 	for (i = 0; i < iommu->num_mmu; i++) {
 		rk_iommu_write(iommu->bases[i], RK_MMU_DTE_ADDR, dte_addr);
-		rk_iommu_command(iommu->bases[i], RK_MMU_CMD_ZAP_CACHE);
+		rk_iommu_base_command(iommu->bases[i], RK_MMU_CMD_ZAP_CACHE);
 		rk_iommu_write(iommu->bases[i], RK_MMU_INT_MASK, RK_MMU_IRQ_MASK);
 	}