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net: mdio: Use mb() to be compatible for both ARM and PowerPC

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Use mb() instead of sync assembly instruction to be
compatible for both ARM and PowerPC.

Signed-off-by: Alison Wang <alison.wang@freescale.com>
This commit is contained in:
Alison Wang 2014-09-05 13:52:37 +08:00 committed by York Sun
parent 93f26f130e
commit d2614ea0ff
1 changed files with 6 additions and 3 deletions
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9
drivers/net/fsl_mdio.c
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@ -19,7 +19,8 @@ void tsec_local_mdio_write(struct tsec_mii_mng __iomem *phyregs, int port_addr,
out_be32(&phyregs->miimadd, (port_addr << 8) | (regnum & 0x1f));
out_be32(&phyregs->miimcon, value);
asm("sync");
/* Memory barrier */
mb();
while ((in_be32(&phyregs->miimind) & MIIMIND_BUSY) && timeout--)
;
@ -37,11 +38,13 @@ int tsec_local_mdio_read(struct tsec_mii_mng __iomem *phyregs, int port_addr,
/* Clear the command register, and wait */
out_be32(&phyregs->miimcom, 0);
asm("sync");
/* Memory barrier */
mb();
/* Initiate a read command, and wait */
out_be32(&phyregs->miimcom, MIIMCOM_READ_CYCLE);
asm("sync");
/* Memory barrier */
mb();
/* Wait for the the indication that the read is done */
while ((in_be32(&phyregs->miimind) & (MIIMIND_NOTVALID | MIIMIND_BUSY))