| Message ID | 20161224035656.11289-1-f.fainelli@gmail.com |
|---|---|
| State | Accepted, archived |
| Delegated to: | David Miller |
| Headers | show |
From: Florian Fainelli <f.fainelli@gmail.com> Date: Fri, 23 Dec 2016 19:56:56 -0800 > Commit beb0babfb77e ("korina: disable napi on close and restart") > introduced calls to napi_disable() that were missing before, > unfortunately this leaves a small window during which NAPI has a chance > to run, yet we just freed resources since korina_free_ring() has been > called: > > Fix this by disabling NAPI first then freeing resource, and make sure > that we also cancel the restart taks before doing the resource freeing. > > Fixes: beb0babfb77e ("korina: disable napi on close and restart") > Reported-by: Alexandros C. Couloumbis <alex@ozo.com> > Signed-off-by: Florian Fainelli <f.fainelli@gmail.com> Applied, thanks.
diff --git a/drivers/net/ethernet/korina.c b/drivers/net/ethernet/korina.c index cbeea915f026..8037426ec50f 100644 --- a/drivers/net/ethernet/korina.c +++ b/drivers/net/ethernet/korina.c @@ -900,10 +900,10 @@ static void korina_restart_task(struct work_struct *work) DMA_STAT_DONE | DMA_STAT_HALT | DMA_STAT_ERR, &lp->rx_dma_regs->dmasm); - korina_free_ring(dev); - napi_disable(&lp->napi); + korina_free_ring(dev); + if (korina_init(dev) < 0) { printk(KERN_ERR "%s: cannot restart device\n", dev->name); return; @@ -1064,12 +1064,12 @@ static int korina_close(struct net_device *dev) tmp = tmp | DMA_STAT_DONE | DMA_STAT_HALT | DMA_STAT_ERR; writel(tmp, &lp->rx_dma_regs->dmasm); - korina_free_ring(dev); - napi_disable(&lp->napi); cancel_work_sync(&lp->restart_task); + korina_free_ring(dev); + free_irq(lp->rx_irq, dev); free_irq(lp->tx_irq, dev); free_irq(lp->ovr_irq, dev);
Commit beb0babfb77e ("korina: disable napi on close and restart") introduced calls to napi_disable() that were missing before, unfortunately this leaves a small window during which NAPI has a chance to run, yet we just freed resources since korina_free_ring() has been called: Fix this by disabling NAPI first then freeing resource, and make sure that we also cancel the restart taks before doing the resource freeing. Fixes: beb0babfb77e ("korina: disable napi on close and restart") Reported-by: Alexandros C. Couloumbis <alex@ozo.com> Signed-off-by: Florian Fainelli <f.fainelli@gmail.com> --- drivers/net/ethernet/korina.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-)