From: Suravee Suthikulpanit Subject: [V4 PATCH 5/6] crypto: ccp - Unify coherency checking logic with device_dma_is_coherent() Date: Fri, 15 May 2015 16:23:13 -0500 Message-ID: <1431724994-21601-6-git-send-email-Suravee.Suthikulpanit@amd.com> References: <1431724994-21601-1-git-send-email-Suravee.Suthikulpanit@amd.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: al.stone@linaro.org, linaro-acpi@lists.linaro.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org, leo.duran@amd.com, hanjun.guo@linaro.org, Suravee Suthikulpanit , msalter@redhat.com, grant.likely@linaro.org, linux-arm-kernel@lists.infradead.org, linux-crypto@vger.kernel.org To: , , , , , , , , Return-path: In-Reply-To: <1431724994-21601-1-git-send-email-Suravee.Suthikulpanit@amd.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=m.gmane.org@lists.infradead.org List-Id: linux-crypto.vger.kernel.org Currently, the driver has separate logic to determine device coherency for DT vs ACPI. This patch simplifies the code with a call to device_dma_is_coherent(). Signed-off-by: Tom Lendacky Signed-off-by: Suravee Suthikulpanit CC: Herbert Xu --- drivers/crypto/ccp/ccp-platform.c | 60 +-------------------------------------- 1 file changed, 1 insertion(+), 59 deletions(-) diff --git a/drivers/crypto/ccp/ccp-platform.c b/drivers/crypto/ccp/ccp-platform.c index b1c20b2..e446781 100644 --- a/drivers/crypto/ccp/ccp-platform.c +++ b/drivers/crypto/ccp/ccp-platform.c @@ -90,58 +90,6 @@ static struct resource *ccp_find_mmio_area(struct ccp_device *ccp) return NULL; } -#ifdef CONFIG_ACPI -static int ccp_acpi_support(struct ccp_device *ccp) -{ - struct ccp_platform *ccp_platform = ccp->dev_specific; - struct acpi_device *adev = ACPI_COMPANION(ccp->dev); - acpi_handle handle; - acpi_status status; - unsigned long long data; - int cca; - - /* Retrieve the device cache coherency value */ - handle = adev->handle; - do { - status = acpi_evaluate_integer(handle, "_CCA", NULL, &data); - if (!ACPI_FAILURE(status)) { - cca = data; - break; - } - } while (!ACPI_FAILURE(status)); - - if (ACPI_FAILURE(status)) { - dev_err(ccp->dev, "error obtaining acpi coherency value\n"); - return -EINVAL; - } - - ccp_platform->coherent = !!cca; - - return 0; -} -#else /* CONFIG_ACPI */ -static int ccp_acpi_support(struct ccp_device *ccp) -{ - return -EINVAL; -} -#endif - -#ifdef CONFIG_OF -static int ccp_of_support(struct ccp_device *ccp) -{ - struct ccp_platform *ccp_platform = ccp->dev_specific; - - ccp_platform->coherent = of_dma_is_coherent(ccp->dev->of_node); - - return 0; -} -#else -static int ccp_of_support(struct ccp_device *ccp) -{ - return -EINVAL; -} -#endif - static int ccp_platform_probe(struct platform_device *pdev) { struct ccp_device *ccp; @@ -182,13 +130,7 @@ static int ccp_platform_probe(struct platform_device *pdev) goto e_err; } - if (ccp_platform->use_acpi) - ret = ccp_acpi_support(ccp); - else - ret = ccp_of_support(ccp); - if (ret) - goto e_err; - + ccp_platform->coherent = device_dma_is_coherent(ccp->dev); if (ccp_platform->coherent) ccp->axcache = CACHE_WB_NO_ALLOC; else -- 2.1.0