linux-kernel - [PATCH] crypto: ccree - Remove a useless dma

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Message-Id: <ef6f884ef144390f152c34d2f549b1f50303b7b1.1658262447.git.christophe.jaillet@wanadoo.fr>
Date:   Tue, 19 Jul 2022 22:27:50 +0200
From:   Christophe JAILLET <christophe.jaillet@...adoo.fr>
To:     Gilad Ben-Yossef <gilad@...yossef.com>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        "David S. Miller" <davem@...emloft.net>
Cc:     linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org,
        Christophe JAILLET <christophe.jaillet@...adoo.fr>,
        linux-crypto@...r.kernel.org
Subject: [PATCH] crypto: ccree - Remove a useless dma_supported() call

There is no point in calling dma_supported() before calling
dma_set_coherent_mask(). This function already calls dma_supported() and
returns an error (-EIO) if it fails.

So remove the superfluous dma_supported() call.

While at it, fix the name of the function reported in a dev_err().

Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
---
I guess that the whole while loop could be removed, but I don't remind the
thread with the corresponding explanation, so leave it as-is :(
---
 drivers/crypto/ccree/cc_driver.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/crypto/ccree/cc_driver.c b/drivers/crypto/ccree/cc_driver.c
index 7d1bee86d581..99f8bda718fe 100644
--- a/drivers/crypto/ccree/cc_driver.c
+++ b/drivers/crypto/ccree/cc_driver.c
@@ -373,16 +373,16 @@ static int init_cc_resources(struct platform_device *plat_dev)
 
 	dma_mask = DMA_BIT_MASK(DMA_BIT_MASK_LEN);
 	while (dma_mask > 0x7fffffffUL) {
-		if (dma_supported(dev, dma_mask)) {
-			rc = dma_set_coherent_mask(dev, dma_mask);
-			if (!rc)
-				break;
-		}
+		rc = dma_set_coherent_mask(dev, dma_mask);
+		if (!rc)
+			break;
+
 		dma_mask >>= 1;
 	}
 
 	if (rc) {
-		dev_err(dev, "Failed in dma_set_mask, mask=%llx\n", dma_mask);
+		dev_err(dev, "Failed in dma_set_coherent_mask, mask=%llx\n",
+			dma_mask);
 		return rc;
 	}
 
-- 
2.34.1