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networking: make skb_put & friends return void pointers

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It seems like a historic accident that these return unsigned char *,
and in many places that means casts are required, more often than not.

Make these functions (skb_put, __skb_put and pskb_put) return void *
and remove all the casts across the tree, adding a (u8 *) cast only
where the unsigned char pointer was used directly, all done with the
following spatch:

    @@
    expression SKB, LEN;
    typedef u8;
    identifier fn = { skb_put, __skb_put };
    @@
    - *(fn(SKB, LEN))
    + *(u8 *)fn(SKB, LEN)

    @@
    expression E, SKB, LEN;
    identifier fn = { skb_put, __skb_put };
    type T;
    @@
    - E = ((T *)(fn(SKB, LEN)))
    + E = fn(SKB, LEN)

which actually doesn't cover pskb_put since there are only three
users overall.

A handful of stragglers were converted manually, notably a macro in
drivers/isdn/i4l/isdn_bsdcomp.c and, oddly enough, one of the many
instances in net/bluetooth/hci_sock.c. In the former file, I also
had to fix one whitespace problem spatch introduced.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Johannes Berg
2017-06-16 14:29:21 +02:00
committed by David S. Miller
parent 59ae1d127a
commit 4df864c1d9
145 changed files with 486 additions and 547 deletions
Download Patch File Download Diff File Expand all files Collapse all files

32
drivers/nfc/pn533/pn533.c
View File

@@ -1032,7 +1032,7 @@ static struct sk_buff *pn533_alloc_poll_tg_frame(struct pn533 *dev)
return NULL;
/* DEP support only */
*skb_put(skb, 1) = PN533_INIT_TARGET_DEP;
*(u8 *)skb_put(skb, 1) = PN533_INIT_TARGET_DEP;
/* MIFARE params */
skb_put_data(skb, mifare_params, 6);
@@ -1046,12 +1046,12 @@ static struct sk_buff *pn533_alloc_poll_tg_frame(struct pn533 *dev)
memcpy(nfcid3, felica, 8);
/* General bytes */
*skb_put(skb, 1) = gbytes_len;
*(u8 *)skb_put(skb, 1) = gbytes_len;
gb = skb_put_data(skb, gbytes, gbytes_len);
/* Len Tk */
*skb_put(skb, 1) = 0;
*(u8 *)skb_put(skb, 1) = 0;
return skb;
}
@@ -1280,8 +1280,8 @@ static void pn533_wq_rf(struct work_struct *work)
if (!skb)
return;
*skb_put(skb, 1) = PN533_CFGITEM_RF_FIELD;
*skb_put(skb, 1) = PN533_CFGITEM_RF_FIELD_AUTO_RFCA;
*(u8 *)skb_put(skb, 1) = PN533_CFGITEM_RF_FIELD;
*(u8 *)skb_put(skb, 1) = PN533_CFGITEM_RF_FIELD_AUTO_RFCA;
rc = pn533_send_cmd_async(dev, PN533_CMD_RF_CONFIGURATION, skb,
pn533_rf_complete, NULL);
@@ -1375,8 +1375,8 @@ static int pn533_poll_dep(struct nfc_dev *nfc_dev)
if (!skb)
return -ENOMEM;
*skb_put(skb, 1) = 0x01; /* Active */
*skb_put(skb, 1) = 0x02; /* 424 kbps */
*(u8 *)skb_put(skb, 1) = 0x01; /* Active */
*(u8 *)skb_put(skb, 1) = 0x02; /* 424 kbps */
next = skb_put(skb, 1); /* Next */
*next = 0;
@@ -1620,8 +1620,8 @@ static int pn533_activate_target_nfcdep(struct pn533 *dev)
if (!skb)
return -ENOMEM;
*skb_put(skb, sizeof(u8)) = 1; /* TG */
*skb_put(skb, sizeof(u8)) = 0; /* Next */
*(u8 *)skb_put(skb, sizeof(u8)) = 1; /* TG */
*(u8 *)skb_put(skb, sizeof(u8)) = 0; /* Next */
resp = pn533_send_cmd_sync(dev, PN533_CMD_IN_ATR, skb);
if (IS_ERR(resp))
@@ -1737,7 +1737,7 @@ static void pn533_deactivate_target(struct nfc_dev *nfc_dev,
if (!skb)
return;
*skb_put(skb, 1) = 1; /* TG*/
*(u8 *)skb_put(skb, 1) = 1; /* TG*/
rc = pn533_send_cmd_async(dev, PN533_CMD_IN_RELEASE, skb,
pn533_deactivate_target_complete, NULL);
@@ -1848,8 +1848,8 @@ static int pn533_dep_link_up(struct nfc_dev *nfc_dev, struct nfc_target *target,
if (!skb)
return -ENOMEM;
*skb_put(skb, 1) = !comm_mode; /* ActPass */
*skb_put(skb, 1) = 0x02; /* 424 kbps */
*(u8 *)skb_put(skb, 1) = !comm_mode; /* ActPass */
*(u8 *)skb_put(skb, 1) = 0x02; /* 424 kbps */
next = skb_put(skb, 1); /* Next */
*next = 0;
@@ -2274,7 +2274,7 @@ static void pn533_wq_mi_recv(struct work_struct *work)
break;
}
default:
*skb_put(skb, sizeof(u8)) = 1; /*TG*/
*(u8 *)skb_put(skb, sizeof(u8)) = 1; /*TG*/
rc = pn533_send_cmd_direct_async(dev,
PN533_CMD_IN_DATA_EXCHANGE,
@@ -2370,7 +2370,7 @@ static int pn533_set_configuration(struct pn533 *dev, u8 cfgitem, u8 *cfgdata,
if (!skb)
return -ENOMEM;
*skb_put(skb, sizeof(cfgitem)) = cfgitem;
*(u8 *)skb_put(skb, sizeof(cfgitem)) = cfgitem;
skb_put_data(skb, cfgdata, cfgdata_len);
resp = pn533_send_cmd_sync(dev, PN533_CMD_RF_CONFIGURATION, skb);
@@ -2415,7 +2415,7 @@ static int pn533_pasori_fw_reset(struct pn533 *dev)
if (!skb)
return -ENOMEM;
*skb_put(skb, sizeof(u8)) = 0x1;
*(u8 *)skb_put(skb, sizeof(u8)) = 0x1;
resp = pn533_send_cmd_sync(dev, 0x18, skb);
if (IS_ERR(resp))
@@ -2454,7 +2454,7 @@ static int pn532_sam_configuration(struct nfc_dev *nfc_dev)
if (!skb)
return -ENOMEM;
*skb_put(skb, 1) = 0x01;
*(u8 *)skb_put(skb, 1) = 0x01;
resp = pn533_send_cmd_sync(dev, PN533_CMD_SAM_CONFIGURATION, skb);
if (IS_ERR(resp))