[PATCH] staging: typec: fix endianness mismatch identified by sparse

[Gabriel L. Somlo]

Eliminate the following sparse warnings:

tcpci.c:291:38: warning: incorrect type in argument 1 (different base types)
tcpci.c:291:38:    expected unsigned short [unsigned] [usertype] header
tcpci.c:291:38:    got restricted __le16 const [usertype] header
tcpci.c:296:16: warning: incorrect type in assignment (different base types)
tcpci.c:296:16:    expected unsigned int [unsigned] header
tcpci.c:296:16:    got restricted __le16
tcpci.c:394:28: warning: incorrect type in assignment (different base types)
tcpci.c:394:28:    expected restricted __le16 [usertype] header
tcpci.c:394:28:    got unsigned int [unsigned] [addressable] reg

Signed-off-by: Gabriel Somlo <gso...@gmail.com>
---
 drivers/staging/typec/tcpci.c | 17 ++++++++++-------
 1 file changed, 10 insertions(+), 7 deletions(-)

diff --git a/drivers/staging/typec/tcpci.c b/drivers/staging/typec/tcpci.c
index b6abaf79ef0b..c6b5b0a3293f 100644
--- a/drivers/staging/typec/tcpci.c
+++ b/drivers/staging/typec/tcpci.c
@@ -47,7 +47,7 @@ static inline struct tcpci *tcpc_to_tcpci(struct tcpc_dev 
*tcpc)
 }
 
 static int tcpci_read16(struct tcpci *tcpci, unsigned int reg,
-                       unsigned int *val)
+                       u16 *val)
 {
        return regmap_raw_read(tcpci->regmap, reg, val, sizeof(u16));
 }
@@ -285,15 +285,15 @@ static int tcpci_pd_transmit(struct tcpc_dev *tcpc,
                             const struct pd_message *msg)
 {
        struct tcpci *tcpci = tcpc_to_tcpci(tcpc);
-       unsigned int reg, cnt, header;
+       u16 header = msg ? le16_to_cpu(msg->header) : 0;
+       unsigned int reg, cnt;
        int ret;
 
-       cnt = msg ? pd_header_cnt(msg->header) * 4 : 0;
+       cnt = msg ? pd_header_cnt(header) * 4 : 0;
        ret = regmap_write(tcpci->regmap, TCPC_TX_BYTE_CNT, cnt + 2);
        if (ret < 0)
                return ret;
 
-       header = msg ? msg->header : 0;
        ret = tcpci_write16(tcpci, TCPC_TX_HDR, header);
        if (ret < 0)
                return ret;
@@ -356,7 +356,7 @@ static int tcpci_init(struct tcpc_dev *tcpc)
 static irqreturn_t tcpci_irq(int irq, void *dev_id)
 {
        struct tcpci *tcpci = dev_id;
-       unsigned int status, reg;
+       u16 status;
 
        tcpci_read16(tcpci, TCPC_ALERT, &status);
 
@@ -372,6 +372,8 @@ static irqreturn_t tcpci_irq(int irq, void *dev_id)
                tcpm_cc_change(tcpci->port);
 
        if (status & TCPC_ALERT_POWER_STATUS) {
+               unsigned int reg;
+
                regmap_read(tcpci->regmap, TCPC_POWER_STATUS_MASK, &reg);
 
                /*
@@ -387,11 +389,12 @@ static irqreturn_t tcpci_irq(int irq, void *dev_id)
        if (status & TCPC_ALERT_RX_STATUS) {
                struct pd_message msg;
                unsigned int cnt;
+               u16 header;
 
                regmap_read(tcpci->regmap, TCPC_RX_BYTE_CNT, &cnt);
 
-               tcpci_read16(tcpci, TCPC_RX_HDR, &reg);
-               msg.header = reg;
+               tcpci_read16(tcpci, TCPC_RX_HDR, &header);
+               msg.header = cpu_to_le16(header);
 
                if (WARN_ON(cnt > sizeof(msg.payload)))
                        cnt = sizeof(msg.payload);
-- 
2.13.6