renegade-project/linux-next
2
0
Fork 0
mirror of https://github.com/edk2-porting/linux-next.git synced 2024-12-17 17:53:56 +08:00
Code

net: dsa: sja1105: Really make the PTP command read-write

Browse Source 
When activating tc-taprio offload on the switch ports, the TAS state
machine will try to check whether it is running or not, but will find
both the STARTED and STOPPED bits as false in the
sja1105_tas_check_running function. So the function will return -EINVAL
(an abnormal situation) and the kernel will keep printing this from the
TAS FSM workqueue:

[   37.691971] sja1105 spi0.1: An operation returned -22

The reason is that the underlying function that gets called,
sja1105_ptp_commit, does not actually do a SPI_READ, but a SPI_WRITE. So
the command buffer remains initialized with zeroes instead of retrieving
the hardware state. Fix that.

Fixes: 41603d78b3 ("net: dsa: sja1105: Make the PTP command read-write")
Signed-off-by: Vladimir Oltean <olteanv@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Vladimir Oltean 2019-12-27 03:01:50 +02:00 committed by David S. Miller
parent 9fcf024dd6
commit 5a47f588ee
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/net/dsa/sja1105/sja1105_ptp.c
View File

@ -234,7 +234,7 @@ int sja1105_ptp_commit(struct dsa_switch *ds, struct sja1105_ptp_cmd *cmd,
if (rw == SPI_WRITE)
priv->info->ptp_cmd_packing(buf, cmd, PACK);
rc = sja1105_xfer_buf(priv, SPI_WRITE, regs->ptp_control, buf,
rc = sja1105_xfer_buf(priv, rw, regs->ptp_control, buf,
SJA1105_SIZE_PTP_CMD);
if (rw == SPI_READ)