samsung_sm8750/android_kernel_samsung_sm8750
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

net: vertexcom: mse102x: Fix possible stuck of SPI interrupt

Browse Source 
[ Upstream commit 55f362885951b2d00fd7fbb02ef0227deea572c2 ]

The MSE102x doesn't provide any SPI commands for interrupt handling.
So in case the interrupt fired before the driver requests the IRQ,
the interrupt will never fire again. In order to fix this always poll
for pending packets after opening the interface.

Fixes: 2f207cbf0d ("net: vertexcom: Add MSE102x SPI support")
Signed-off-by: Stefan Wahren <wahrenst@gmx.net>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://patch.msgid.link/20250430133043.7722-2-wahrenst@gmx.net
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Stefan Wahren
2025-04-30 15:30:40 +02:00
committed by Greg Kroah-Hartman
parent cb5922f74b
commit e1301580bf
1 changed files with 8 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
drivers/net/ethernet/vertexcom/mse102x.c
View File

@@ -509,6 +509,7 @@ static irqreturn_t mse102x_irq(int irq, void *_mse)
static int mse102x_net_open(struct net_device *ndev)
{
struct mse102x_net *mse = netdev_priv(ndev);
struct mse102x_net_spi *mses = to_mse102x_spi(mse);
int ret;
ret = request_threaded_irq(ndev->irq, NULL, mse102x_irq, IRQF_ONESHOT,
@@ -524,6 +525,13 @@ static int mse102x_net_open(struct net_device *ndev)
netif_carrier_on(ndev);
/* The SPI interrupt can stuck in case of pending packet(s).
* So poll for possible packet(s) to re-arm the interrupt.
*/
mutex_lock(&mses->lock);
mse102x_rx_pkt_spi(mse);
mutex_unlock(&mses->lock);
netif_dbg(mse, ifup, ndev, "network device up\n");
return 0;