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Message-ID: <1431045436-8690-5-git-send-email-Suravee.Suthikulpanit@amd.com>
Date: Thu, 7 May 2015 19:37:15 -0500
From: Suravee Suthikulpanit <Suravee.Suthikulpanit@....com>
To: <rjw@...ysocki.net>, <lenb@...nel.org>, <catalin.marinas@....com>,
<will.deacon@....com>, <thomas.lendacky@....com>,
<herbert@...dor.apana.org.au>, <davem@...emloft.net>,
<arnd@...db.de>
CC: <msalter@...hat.com>, <hanjun.guo@...aro.org>,
<al.stone@...aro.org>, <grant.likely@...aro.org>,
<leo.duran@....com>, <linux-arm-kernel@...ts.infradead.org>,
<linux-acpi@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
<linaro-acpi@...ts.linaro.org>, <netdev@...r.kernel.org>,
<linux-crypto@...r.kernel.org>,
"Suravee Suthikulpanit" <Suravee.Suthikulpanit@....com>
Subject: [V3 PATCH 4/5] crypto: ccp - Unify coherency checking logic with device_dma_is_coherent()
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 <thomas.lendacky@....com>
Signed-off-by: Suravee Suthikulpanit <Suravee.Suthikulpanit@....com>
---
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
--
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