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amd-xgbe: Use __napi_schedule() in BH context 

[ Upstream commit d518691cbd ]

The driver uses __napi_schedule_irqoff() which is fine as long as it is
invoked with disabled interrupts by everybody. Since the commit
mentioned below the driver may invoke xgbe_isr_task() in tasklet/softirq
context. This may lead to list corruption if another driver uses
__napi_schedule_irqoff() in IRQ context.

Use __napi_schedule() which safe to use from IRQ and softirq context.

Fixes: 85b85c8534 ("amd-xgbe: Re-issue interrupt if interrupt status not cleared")
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Acked-by: Tom Lendacky <thomas.lendacky@amd.com>
Cc: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5.4-rM2-2.2.x-imx-squashed
Sebastian Andrzej Siewior 2020-04-16 17:57:40 +02:00 committed by Greg Kroah-Hartman
parent dc4059d21d
commit ced57064a0
1 changed files with 1 additions and 1 deletions
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2
drivers/net/ethernet/amd/xgbe/xgbe-drv.c
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@ -514,7 +514,7 @@ static void xgbe_isr_task(unsigned long data)
xgbe_disable_rx_tx_ints(pdata);
/* Turn on polling */
__napi_schedule_irqoff(&pdata->napi);
__napi_schedule(&pdata->napi);
}
} else {
/* Don't clear Rx/Tx status if doing per channel DMA