MIRRORS/linux-yocto
1
0
Fork 0
mirror of git://git.yoctoproject.org/linux-yocto.git synced 2025-10-23 07:23:12 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity

net: vertexcom: mse102x: Simplify mse102x_rx_pkt_spi

Browse Source 
The function mse102x_rx_pkt_spi is used in two cases:
* initial polling to re-arm RX interrupt
* level based RX interrupt handler

Both of them doesn't need an open-coded retry mechanism.
In the first case the function can be called again, if the return code
is IRQ_NONE. This keeps the error behavior during netdev open.

In the second case the proper retry would be handled implicit by
the SPI interrupt. So drop the retry code and simplify the receive path.

Signed-off-by: Stefan Wahren <wahrenst@gmx.net>
Link: https://patch.msgid.link/20250509120435.43646-7-wahrenst@gmx.net
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Stefan Wahren 2025-05-09 14:04:35 +02:00 committed by Jakub Kicinski
parent 4ecf56f4b6
commit 8ea6e51e54
1 changed files with 12 additions and 22 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

34
drivers/net/ethernet/vertexcom/mse102x.c
View File

@ -319,31 +319,20 @@ static irqreturn_t mse102x_rx_pkt_spi(struct mse102x_net *mse)
__be16 rx = 0;
u16 cmd_resp;
u8 *rxpkt;
int ret;
mse102x_tx_cmd_spi(mse, CMD_CTR);
ret = mse102x_rx_cmd_spi(mse, (u8 *)&rx);
cmd_resp = be16_to_cpu(rx);
if (ret || ((cmd_resp & CMD_MASK) != CMD_RTS)) {
if (mse102x_rx_cmd_spi(mse, (u8 *)&rx)) {
usleep_range(50, 100);
return IRQ_NONE;
}
mse102x_tx_cmd_spi(mse, CMD_CTR);
ret = mse102x_rx_cmd_spi(mse, (u8 *)&rx);
if (ret)
return IRQ_NONE;
cmd_resp = be16_to_cpu(rx);
if ((cmd_resp & CMD_MASK) != CMD_RTS) {
net_dbg_ratelimited("%s: Unexpected response (0x%04x)\n",
__func__, cmd_resp);
mse->stats.invalid_rts++;
drop = true;
goto drop;
}
net_dbg_ratelimited("%s: Unexpected response to first CMD\n",
__func__);
cmd_resp = be16_to_cpu(rx);
if ((cmd_resp & CMD_MASK) != CMD_RTS) {
net_dbg_ratelimited("%s: Unexpected response (0x%04x)\n",
__func__, cmd_resp);
mse->stats.invalid_rts++;
drop = true;
goto drop;
}
rxlen = cmd_resp & LEN_MASK;
@ -565,7 +554,8 @@ static int mse102x_net_open(struct net_device *ndev)
* So poll for possible packet(s) to re-arm the interrupt.
*/
mutex_lock(&mses->lock);
mse102x_rx_pkt_spi(mse);
if (mse102x_rx_pkt_spi(mse) == IRQ_NONE)
mse102x_rx_pkt_spi(mse);
mutex_unlock(&mses->lock);
netif_dbg(mse, ifup, ndev, "network device up\n");