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authorAl Viro <viro@zeniv.linux.org.uk>2017-04-17 00:42:22 +0200
committerSamuel Ortiz <sameo@linux.intel.com>2017-04-17 00:42:22 +0200
commit4ea206395d3aede32bab94a75ec573530486fa44 (patch)
tree69c9d431bb02be210886f673c6fe467327cc156c /drivers/nfc
parent8b55d7581fc5dccc658b9a169879c46dda807d5e (diff)
downloadlinux-4ea206395d3aede32bab94a75ec573530486fa44.tar.bz2
nfc: fix get_unaligned_...() misuses
* if a local variable of type uint16_t is unaligned, your compiler is FUBAR * the whole point of get_unaligned_... is to avoid memcpy + ..._to_cpu(). Using it *after* memcpy() (into aligned object, no less) is pointless. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Diffstat (limited to 'drivers/nfc')
-rw-r--r--drivers/nfc/nfcmrvl/fw_dnld.c5
-rw-r--r--drivers/nfc/nxp-nci/i2c.c2
2 files changed, 3 insertions, 4 deletions
diff --git a/drivers/nfc/nfcmrvl/fw_dnld.c b/drivers/nfc/nfcmrvl/fw_dnld.c
index 441c1b0ec7b5..c38bdd6a5a82 100644
--- a/drivers/nfc/nfcmrvl/fw_dnld.c
+++ b/drivers/nfc/nfcmrvl/fw_dnld.c
@@ -281,12 +281,11 @@ static int process_state_fw_dnld(struct nfcmrvl_private *priv,
return -EINVAL;
}
skb_pull(skb, 1);
- memcpy(&len, skb->data, 2);
+ len = get_unaligned_le16(skb->data);
skb_pull(skb, 2);
+ comp_len = get_unaligned_le16(skb->data);
memcpy(&comp_len, skb->data, 2);
skb_pull(skb, 2);
- len = get_unaligned_le16(&len);
- comp_len = get_unaligned_le16(&comp_len);
if (((~len) & 0xFFFF) != comp_len) {
nfc_err(priv->dev, "bad len complement: %x %x %x",
len, comp_len, (~len & 0xFFFF));
diff --git a/drivers/nfc/nxp-nci/i2c.c b/drivers/nfc/nxp-nci/i2c.c
index c6a04a950225..ff22d761183c 100644
--- a/drivers/nfc/nxp-nci/i2c.c
+++ b/drivers/nfc/nxp-nci/i2c.c
@@ -126,7 +126,7 @@ static int nxp_nci_i2c_fw_read(struct nxp_nci_i2c_phy *phy,
goto fw_read_exit;
}
- frame_len = (get_unaligned_be16(&header) & NXP_NCI_FW_FRAME_LEN_MASK) +
+ frame_len = (be16_to_cpu(header) & NXP_NCI_FW_FRAME_LEN_MASK) +
NXP_NCI_FW_CRC_LEN;
*skb = alloc_skb(NXP_NCI_FW_HDR_LEN + frame_len, GFP_KERNEL);