[PATCH] NFC: port100: Introduce the use of function put_unaligned_le16

[Vaishali Thakkar]

This patch introduces the use of function put_unaligned_le16.

This is done using Coccinelle and semantic patch used is as follows:

@a@
typedef u16, __le16;
{u16,__le16} e16;
identifier tmp;
expression ptr;
expression y,e;
type T;
@@

- tmp = cpu_to_le16(y);

  <+... when != tmp
(
- memcpy(ptr, (T)&tmp, \(2\|sizeof(u16)\|sizeof(__le16)\|sizeof(e16)\));
+ put_unaligned_le16(y,ptr);
|
- memcpy(ptr, (T)&tmp, ...);
+ put_unaligned_le16(y,ptr);
)
  ...+>
? tmp = e

@@ type T; identifier a.tmp; @@

- T tmp;
...when != tmp

Signed-off-by: Vaishali Thakkar <vthakkar1...@gmail.com>
---
 drivers/nfc/port100.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/nfc/port100.c b/drivers/nfc/port100.c
index 4ac4d31..f7cbca8 100644
--- a/drivers/nfc/port100.c
+++ b/drivers/nfc/port100.c
@@ -18,6 +18,7 @@
 #include <linux/module.h>
 #include <linux/usb.h>
 #include <net/nfc/digital.h>
+#include <linux/unaligned/access_ok.h>
 
 #define VERSION "0.1"
 
@@ -1136,7 +1137,6 @@ static int port100_in_send_cmd(struct nfc_digital_dev 
*ddev,
 {
        struct port100 *dev = nfc_digital_get_drvdata(ddev);
        struct port100_cb_arg *cb_arg;
-       __le16 timeout;
 
        cb_arg = kzalloc(sizeof(struct port100_cb_arg), GFP_KERNEL);
        if (!cb_arg)
@@ -1145,9 +1145,7 @@ static int port100_in_send_cmd(struct nfc_digital_dev 
*ddev,
        cb_arg->complete_cb = cb;
        cb_arg->complete_arg = arg;
 
-       timeout = cpu_to_le16(_timeout * 10);
-
-       memcpy(skb_push(skb, sizeof(__le16)), &timeout, sizeof(__le16));
+       put_unaligned_le16(_timeout * 10, skb_push(skb, sizeof(__le16)));
 
        return port100_send_cmd_async(dev, PORT100_CMD_IN_COMM_RF, skb,
                                      port100_in_comm_rf_complete, cb_arg);
-- 
1.9.1

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