[PATCH 3/8] drivers/mmc/host: Use ERR_CAST

From: Julia Lawall
Date: Sat May 22 2010 - 06:00:21 EST


From: Julia Lawall <julia@xxxxxxx>

Use ERR_CAST(x) rather than ERR_PTR(PTR_ERR(x)). The former makes more
clear what is the purpose of the operation, which otherwise looks like a
no-op.

The semantic patch that makes this change is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@@
type T;
T x;
identifier f;
@@

T f (...) { <+...
- ERR_PTR(PTR_ERR(x))
+ x
...+> }

@@
expression x;
@@

- ERR_PTR(PTR_ERR(x))
+ ERR_CAST(x)
// </smpl>

Signed-off-by: Julia Lawall <julia@xxxxxxx>

---
drivers/mmc/host/sdhci-pci.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff -u -p a/drivers/mmc/host/sdhci-pci.c b/drivers/mmc/host/sdhci-pci.c
--- a/drivers/mmc/host/sdhci-pci.c
+++ b/drivers/mmc/host/sdhci-pci.c
@@ -628,7 +628,7 @@ static struct sdhci_pci_slot * __devinit
host = sdhci_alloc_host(&pdev->dev, sizeof(struct sdhci_pci_slot));
if (IS_ERR(host)) {
dev_err(&pdev->dev, "cannot allocate host\n");
- return ERR_PTR(PTR_ERR(host));
+ return ERR_CAST(host);
}

slot = sdhci_priv(host);
--
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