[PATCH] net/wan/fsl_ucc_hdlc: fix sparse warnings
From: Christophe Leroy
Date: Mon Nov 15 2021 - 06:09:56 EST
CHECK drivers/net/wan/fsl_ucc_hdlc.c
drivers/net/wan/fsl_ucc_hdlc.c:309:57: warning: incorrect type in argument 2 (different address spaces)
drivers/net/wan/fsl_ucc_hdlc.c:309:57: expected void [noderef] __iomem *
drivers/net/wan/fsl_ucc_hdlc.c:309:57: got restricted __be16 *
drivers/net/wan/fsl_ucc_hdlc.c:311:46: warning: incorrect type in argument 2 (different address spaces)
drivers/net/wan/fsl_ucc_hdlc.c:311:46: expected void [noderef] __iomem *
drivers/net/wan/fsl_ucc_hdlc.c:311:46: got restricted __be32 *
drivers/net/wan/fsl_ucc_hdlc.c:320:57: warning: incorrect type in argument 2 (different address spaces)
drivers/net/wan/fsl_ucc_hdlc.c:320:57: expected void [noderef] __iomem *
drivers/net/wan/fsl_ucc_hdlc.c:320:57: got restricted __be16 *
drivers/net/wan/fsl_ucc_hdlc.c:322:46: warning: incorrect type in argument 2 (different address spaces)
drivers/net/wan/fsl_ucc_hdlc.c:322:46: expected void [noderef] __iomem *
drivers/net/wan/fsl_ucc_hdlc.c:322:46: got restricted __be32 *
drivers/net/wan/fsl_ucc_hdlc.c:372:29: warning: incorrect type in assignment (different base types)
drivers/net/wan/fsl_ucc_hdlc.c:372:29: expected unsigned short [usertype]
drivers/net/wan/fsl_ucc_hdlc.c:372:29: got restricted __be16 [usertype]
drivers/net/wan/fsl_ucc_hdlc.c:379:36: warning: restricted __be16 degrades to integer
drivers/net/wan/fsl_ucc_hdlc.c:402:12: warning: incorrect type in assignment (different address spaces)
drivers/net/wan/fsl_ucc_hdlc.c:402:12: expected struct qe_bd [noderef] __iomem *bd
drivers/net/wan/fsl_ucc_hdlc.c:402:12: got struct qe_bd *curtx_bd
drivers/net/wan/fsl_ucc_hdlc.c:425:20: warning: incorrect type in assignment (different address spaces)
drivers/net/wan/fsl_ucc_hdlc.c:425:20: expected struct qe_bd [noderef] __iomem *[assigned] bd
drivers/net/wan/fsl_ucc_hdlc.c:425:20: got struct qe_bd *tx_bd_base
drivers/net/wan/fsl_ucc_hdlc.c:427:16: error: incompatible types in comparison expression (different address spaces):
drivers/net/wan/fsl_ucc_hdlc.c:427:16: struct qe_bd [noderef] __iomem *
drivers/net/wan/fsl_ucc_hdlc.c:427:16: struct qe_bd *
drivers/net/wan/fsl_ucc_hdlc.c:462:33: warning: incorrect type in argument 1 (different address spaces)
drivers/net/wan/fsl_ucc_hdlc.c:506:41: warning: incorrect type in argument 1 (different address spaces)
drivers/net/wan/fsl_ucc_hdlc.c:528:33: warning: incorrect type in argument 1 (different address spaces)
drivers/net/wan/fsl_ucc_hdlc.c:552:38: warning: incorrect type in argument 1 (different address spaces)
drivers/net/wan/fsl_ucc_hdlc.c:596:67: warning: incorrect type in argument 2 (different address spaces)
drivers/net/wan/fsl_ucc_hdlc.c:611:41: warning: incorrect type in argument 1 (different address spaces)
drivers/net/wan/fsl_ucc_hdlc.c:851:38: warning: incorrect type in initializer (different address spaces)
drivers/net/wan/fsl_ucc_hdlc.c:854:40: warning: incorrect type in argument 1 (different address spaces)
drivers/net/wan/fsl_ucc_hdlc.c:855:40: warning: incorrect type in argument 1 (different address spaces)
drivers/net/wan/fsl_ucc_hdlc.c:858:39: warning: incorrect type in argument 1 (different address spaces)
drivers/net/wan/fsl_ucc_hdlc.c:861:37: warning: incorrect type in argument 2 (different address spaces)
drivers/net/wan/fsl_ucc_hdlc.c:866:38: warning: incorrect type in initializer (different address spaces)
drivers/net/wan/fsl_ucc_hdlc.c:868:21: warning: incorrect type in argument 1 (different address spaces)
drivers/net/wan/fsl_ucc_hdlc.c:870:40: warning: incorrect type in argument 2 (different address spaces)
drivers/net/wan/fsl_ucc_hdlc.c:871:40: warning: incorrect type in argument 2 (different address spaces)
drivers/net/wan/fsl_ucc_hdlc.c:873:39: warning: incorrect type in argument 2 (different address spaces)
drivers/net/wan/fsl_ucc_hdlc.c:993:57: warning: incorrect type in argument 2 (different address spaces)
drivers/net/wan/fsl_ucc_hdlc.c:995:46: warning: incorrect type in argument 2 (different address spaces)
drivers/net/wan/fsl_ucc_hdlc.c:1004:57: warning: incorrect type in argument 2 (different address spaces)
drivers/net/wan/fsl_ucc_hdlc.c:1006:46: warning: incorrect type in argument 2 (different address spaces)
drivers/net/wan/fsl_ucc_hdlc.c:412:35: warning: dereference of noderef expression
drivers/net/wan/fsl_ucc_hdlc.c:412:35: warning: dereference of noderef expression
drivers/net/wan/fsl_ucc_hdlc.c:724:29: warning: dereference of noderef expression
drivers/net/wan/fsl_ucc_hdlc.c:815:21: warning: dereference of noderef expression
drivers/net/wan/fsl_ucc_hdlc.c:1021:29: warning: dereference of noderef expression
Most of the warnings are due to DMA memory being incorrectly handled as IO memory.
Fix it by doing direct read/write and doing proper dma_rmb() / dma_wmb().
Other problems are type mismatches or lack of use of IO accessors.
Cc: Rasmus Villemoes <linux@xxxxxxxxxxxxxxxxxx>
Reported-by: kernel test robot <lkp@xxxxxxxxx>
Link: https://lkml.org/lkml/2021/11/12/647
Signed-off-by: Christophe Leroy <christophe.leroy@xxxxxxxxxx>
---
drivers/net/wan/fsl_ucc_hdlc.c | 62 ++++++++++++++++++----------------
1 file changed, 32 insertions(+), 30 deletions(-)
diff --git a/drivers/net/wan/fsl_ucc_hdlc.c b/drivers/net/wan/fsl_ucc_hdlc.c
index cda1b4ce6b21..5ae2d27b5da9 100644
--- a/drivers/net/wan/fsl_ucc_hdlc.c
+++ b/drivers/net/wan/fsl_ucc_hdlc.c
@@ -306,9 +306,8 @@ static int uhdlc_init(struct ucc_hdlc_private *priv)
else
bd_status = R_E_S | R_I_S | R_W_S;
- iowrite16be(bd_status, &priv->rx_bd_base[i].status);
- iowrite32be(priv->dma_rx_addr + i * MAX_RX_BUF_LENGTH,
- &priv->rx_bd_base[i].buf);
+ priv->rx_bd_base[i].status = cpu_to_be16(bd_status);
+ priv->rx_bd_base[i].buf = cpu_to_be32(priv->dma_rx_addr + i * MAX_RX_BUF_LENGTH);
}
for (i = 0; i < TX_BD_RING_LEN; i++) {
@@ -317,10 +316,10 @@ static int uhdlc_init(struct ucc_hdlc_private *priv)
else
bd_status = T_I_S | T_TC_S | T_W_S;
- iowrite16be(bd_status, &priv->tx_bd_base[i].status);
- iowrite32be(priv->dma_tx_addr + i * MAX_RX_BUF_LENGTH,
- &priv->tx_bd_base[i].buf);
+ priv->tx_bd_base[i].status = cpu_to_be16(bd_status);
+ priv->tx_bd_base[i].buf = cpu_to_be32(priv->dma_tx_addr + i * MAX_RX_BUF_LENGTH);
}
+ dma_wmb();
return 0;
@@ -352,10 +351,10 @@ static netdev_tx_t ucc_hdlc_tx(struct sk_buff *skb, struct net_device *dev)
{
hdlc_device *hdlc = dev_to_hdlc(dev);
struct ucc_hdlc_private *priv = (struct ucc_hdlc_private *)hdlc->priv;
- struct qe_bd __iomem *bd;
+ struct qe_bd *bd;
u16 bd_status;
unsigned long flags;
- u16 *proto_head;
+ __be16 *proto_head;
switch (dev->type) {
case ARPHRD_RAWHDLC:
@@ -368,14 +367,14 @@ static netdev_tx_t ucc_hdlc_tx(struct sk_buff *skb, struct net_device *dev)
skb_push(skb, HDLC_HEAD_LEN);
- proto_head = (u16 *)skb->data;
+ proto_head = (__be16 *)skb->data;
*proto_head = htons(DEFAULT_HDLC_HEAD);
dev->stats.tx_bytes += skb->len;
break;
case ARPHRD_PPP:
- proto_head = (u16 *)skb->data;
+ proto_head = (__be16 *)skb->data;
if (*proto_head != htons(DEFAULT_PPP_HEAD)) {
dev->stats.tx_dropped++;
dev_kfree_skb(skb);
@@ -398,9 +397,10 @@ static netdev_tx_t ucc_hdlc_tx(struct sk_buff *skb, struct net_device *dev)
netdev_sent_queue(dev, skb->len);
spin_lock_irqsave(&priv->lock, flags);
+ dma_rmb();
/* Start from the next BD that should be filled */
bd = priv->curtx_bd;
- bd_status = ioread16be(&bd->status);
+ bd_status = be16_to_cpu(bd->status);
/* Save the skb pointer so we can free it later */
priv->tx_skbuff[priv->skb_curtx] = skb;
@@ -415,8 +415,8 @@ static netdev_tx_t ucc_hdlc_tx(struct sk_buff *skb, struct net_device *dev)
/* set bd status and length */
bd_status = (bd_status & T_W_S) | T_R_S | T_I_S | T_L_S | T_TC_S;
- iowrite16be(skb->len, &bd->length);
- iowrite16be(bd_status, &bd->status);
+ bd->length = cpu_to_be16(skb->len);
+ bd->status = cpu_to_be16(bd_status);
/* Move to next BD in the ring */
if (!(bd_status & T_W_S))
@@ -458,8 +458,9 @@ static int hdlc_tx_done(struct ucc_hdlc_private *priv)
u16 bd_status;
int tx_restart = 0;
+ dma_rmb();
bd = priv->dirty_tx;
- bd_status = ioread16be(&bd->status);
+ bd_status = be16_to_cpu(bd->status);
/* Normal processing. */
while ((bd_status & T_R_S) == 0) {
@@ -503,7 +504,7 @@ static int hdlc_tx_done(struct ucc_hdlc_private *priv)
bd += 1;
else
bd = priv->tx_bd_base;
- bd_status = ioread16be(&bd->status);
+ bd_status = be16_to_cpu(bd->status);
}
priv->dirty_tx = bd;
@@ -524,8 +525,9 @@ static int hdlc_rx_done(struct ucc_hdlc_private *priv, int rx_work_limit)
u16 length, howmany = 0;
u8 *bdbuffer;
+ dma_rmb();
bd = priv->currx_bd;
- bd_status = ioread16be(&bd->status);
+ bd_status = be16_to_cpu(bd->status);
/* while there are received buffers and BD is full (~R_E) */
while (!((bd_status & (R_E_S)) || (--rx_work_limit < 0))) {
@@ -549,7 +551,7 @@ static int hdlc_rx_done(struct ucc_hdlc_private *priv, int rx_work_limit)
}
bdbuffer = priv->rx_buffer +
(priv->currx_bdnum * MAX_RX_BUF_LENGTH);
- length = ioread16be(&bd->length);
+ length = be16_to_cpu(bd->length);
switch (dev->type) {
case ARPHRD_RAWHDLC:
@@ -593,7 +595,7 @@ static int hdlc_rx_done(struct ucc_hdlc_private *priv, int rx_work_limit)
netif_receive_skb(skb);
recycle:
- iowrite16be((bd_status & R_W_S) | R_E_S | R_I_S, &bd->status);
+ bd->status = cpu_to_be16((bd_status & R_W_S) | R_E_S | R_I_S);
/* update to point at the next bd */
if (bd_status & R_W_S) {
@@ -608,8 +610,9 @@ static int hdlc_rx_done(struct ucc_hdlc_private *priv, int rx_work_limit)
bd += 1;
}
- bd_status = ioread16be(&bd->status);
+ bd_status = be16_to_cpu(bd->status);
}
+ dma_rmb();
priv->currx_bd = bd;
return howmany;
@@ -721,7 +724,7 @@ static int uhdlc_open(struct net_device *dev)
/* Enable the TDM port */
if (priv->tsa)
- utdm->si_regs->siglmr1_h |= (0x1 << utdm->tdm_port);
+ qe_setbits_8(&utdm->si_regs->siglmr1_h, 0x1 << utdm->tdm_port);
priv->hdlc_busy = 1;
netif_device_attach(priv->ndev);
@@ -812,7 +815,7 @@ static int uhdlc_close(struct net_device *dev)
(u8)QE_CR_PROTOCOL_UNSPECIFIED, 0);
if (priv->tsa)
- utdm->si_regs->siglmr1_h &= ~(0x1 << utdm->tdm_port);
+ qe_clrbits_8(&utdm->si_regs->siglmr1_h, 0x1 << utdm->tdm_port);
ucc_fast_disable(priv->uccf, COMM_DIR_RX | COMM_DIR_TX);
@@ -848,7 +851,7 @@ static int ucc_hdlc_attach(struct net_device *dev, unsigned short encoding,
#ifdef CONFIG_PM
static void store_clk_config(struct ucc_hdlc_private *priv)
{
- struct qe_mux *qe_mux_reg = &qe_immr->qmx;
+ struct qe_mux __iomem *qe_mux_reg = &qe_immr->qmx;
/* store si clk */
priv->cmxsi1cr_h = ioread32be(&qe_mux_reg->cmxsi1cr_h);
@@ -863,7 +866,7 @@ static void store_clk_config(struct ucc_hdlc_private *priv)
static void resume_clk_config(struct ucc_hdlc_private *priv)
{
- struct qe_mux *qe_mux_reg = &qe_immr->qmx;
+ struct qe_mux __iomem *qe_mux_reg = &qe_immr->qmx;
memcpy_toio(qe_mux_reg->cmxucr, priv->cmxucr, 4 * sizeof(u32));
@@ -990,9 +993,8 @@ static int uhdlc_resume(struct device *dev)
else
bd_status = R_E_S | R_I_S | R_W_S;
- iowrite16be(bd_status, &priv->rx_bd_base[i].status);
- iowrite32be(priv->dma_rx_addr + i * MAX_RX_BUF_LENGTH,
- &priv->rx_bd_base[i].buf);
+ priv->rx_bd_base[i].status = cpu_to_be16(bd_status);
+ priv->rx_bd_base[i].buf = cpu_to_be32(priv->dma_rx_addr + i * MAX_RX_BUF_LENGTH);
}
for (i = 0; i < TX_BD_RING_LEN; i++) {
@@ -1001,10 +1003,10 @@ static int uhdlc_resume(struct device *dev)
else
bd_status = T_I_S | T_TC_S | T_W_S;
- iowrite16be(bd_status, &priv->tx_bd_base[i].status);
- iowrite32be(priv->dma_tx_addr + i * MAX_RX_BUF_LENGTH,
- &priv->tx_bd_base[i].buf);
+ priv->tx_bd_base[i].status = cpu_to_be16(bd_status);
+ priv->tx_bd_base[i].buf = cpu_to_be32(priv->dma_tx_addr + i * MAX_RX_BUF_LENGTH);
}
+ dma_wmb();
/* if hdlc is busy enable TX and RX */
if (priv->hdlc_busy == 1) {
@@ -1018,7 +1020,7 @@ static int uhdlc_resume(struct device *dev)
/* Enable the TDM port */
if (priv->tsa)
- utdm->si_regs->siglmr1_h |= (0x1 << utdm->tdm_port);
+ qe_setbits_8(&utdm->si_regs->siglmr1_h, 0x1 << utdm->tdm_port);
}
napi_enable(&priv->napi);
--
2.31.1