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cxgb4: clean up a type issue

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The tx_desc struct holds 8 __be64 values.  The original code in
ring_tx_db() took a tx_desc pointer then casted it to an int pointer and
then casted it to a u64 pointer.  It was confusing and triggered some
static checker warnings.

I have changed the cxgb_pio_copy() function to only take tx_desc
pointers.  This isn't really a loss of flexibility because anything else
was buggy to begin with.

I also removed the casting on the destination pointer since that was
unnecessary and a bit messy.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Dan Carpenter 2014-10-08 16:44:34 +03:00 committed by David S. Miller
parent 9fef847803
commit fb5ac0de10
1 changed files with 8 additions and 10 deletions
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18
drivers/net/ethernet/chelsio/cxgb4/sge.c
View file

@ -850,13 +850,14 @@ static void write_sgl(const struct sk_buff *skb, struct sge_txq *q,
*end = 0;
}
/* This function copies 64 byte coalesced work request to
* memory mapped BAR2 space(user space writes).
* For coalesced WR SGE, fetches data from the FIFO instead of from Host.
/* This function copies a tx_desc struct to memory mapped BAR2 space(user space
* writes). For coalesced WR SGE, fetches data from the FIFO instead of from
* Host.
*/
static void cxgb_pio_copy(u64 __iomem *dst, u64 *src)
static void cxgb_pio_copy(u64 __iomem *dst, struct tx_desc *desc)
{
int count = 8;
int count = sizeof(*desc) / sizeof(u64);
u64 *src = (u64 *)desc;
while (count) {
writeq(*src, dst);
@ -914,12 +915,9 @@ static inline void ring_tx_db(struct adapter *adap, struct sge_txq *q, int n)
int index = (q->pidx
? (q->pidx - 1)
: (q->size - 1));
unsigned int *wr = (unsigned int *)&q->desc[index];
cxgb_pio_copy((u64 __iomem *)
(adap->bar2 + q->udb +
SGE_UDB_WCDOORBELL),
(u64 *)wr);
cxgb_pio_copy(adap->bar2 + q->udb + SGE_UDB_WCDOORBELL,
q->desc + index);
} else {
writel(val, adap->bar2 + q->udb + SGE_UDB_KDOORBELL);
}