[PATCH] char: xillybus: use devm_add_action_or_reset

From	Sudip Mukherjee <sudipm.mukherjee@gmail.com>
Newsgroups	linux.kernel
Subject	[PATCH] char: xillybus: use devm_add_action_or_reset
Date	2016-04-25 23:00 +0200
Message-ID	<rrVLP-3EY-1@gated-at.bofh.it> (permalink)
Organization	linux.* mail to news gateway

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If devm_add_action() fails we are explicitly calling dma_unmap_single()
and kfree(). Lets use the helper devm_add_action_or_reset() and return
directly in case of error, as we know that the cleanup function has been
already called by the helper if there was any error.

Signed-off-by: Sudip Mukherjee <sudip.mukherjee@codethink.co.uk>
---
 drivers/char/xillybus/xillybus_of.c   | 7 ++-----
 drivers/char/xillybus/xillybus_pcie.c | 7 ++-----
 2 files changed, 4 insertions(+), 10 deletions(-)

diff --git a/drivers/char/xillybus/xillybus_of.c b/drivers/char/xillybus/xillybus_of.c
index 7818650..17f45b6 100644
--- a/drivers/char/xillybus/xillybus_of.c
+++ b/drivers/char/xillybus/xillybus_of.c
@@ -101,13 +101,10 @@ static int xilly_map_single_of(struct xilly_endpoint *ep,
 
 	*ret_dma_handle = addr;
 
-	rc = devm_add_action(ep->dev, xilly_of_unmap, this);
+	rc = devm_add_action_or_reset(ep->dev, xilly_of_unmap, this);
 
-	if (rc) {
-		dma_unmap_single(ep->dev, addr, size, direction);
-		kfree(this);
+	if (rc)
 		return rc;
-	}
 
 	return 0;
 }
diff --git a/drivers/char/xillybus/xillybus_pcie.c b/drivers/char/xillybus/xillybus_pcie.c
index 9418300..99c688f 100644
--- a/drivers/char/xillybus/xillybus_pcie.c
+++ b/drivers/char/xillybus/xillybus_pcie.c
@@ -120,12 +120,9 @@ static int xilly_map_single_pci(struct xilly_endpoint *ep,
 
 	*ret_dma_handle = addr;
 
-	rc = devm_add_action(ep->dev, xilly_pci_unmap, this);
-	if (rc) {
-		pci_unmap_single(ep->pdev, addr, size, pci_direction);
-		kfree(this);
+	rc = devm_add_action_or_reset(ep->dev, xilly_pci_unmap, this);
+	if (rc)
 		return rc;
-	}
 
 	return 0;
 }
-- 
1.9.1

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[PATCH] char: xillybus: use devm_add_action_or_reset Sudip Mukherjee <sudipm.mukherjee@gmail.com> - 2016-04-25 23:00 +0200
  Re: [PATCH] char: xillybus: use devm_add_action_or_reset Eli Billauer <eli.billauer@gmail.com> - 2016-04-26 12:50 +0200

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