diff options
| author | Alexandre Rames <arames@solarflare.com> | 2013-03-21 16:41:43 +0000 |
|---|---|---|
| committer | Ben Hutchings <bhutchings@solarflare.com> | 2013-06-24 19:58:25 +0100 |
| commit | b28405b0f25c91b52350fd558c219f08e5033eaf (patch) | |
| tree | aaf3d37c96a0a789ae23dd4f751cd9c57f24a1c8 /drivers/net/ethernet/sfc/nic.c | |
| parent | 37173488400704f1a05656616cd12baa9e03173b (diff) | |
sfc: Fix EEH with legacy interrupts.
PCI legacy interrupts are level-triggered, and we cannot mask them up
on an isolated device. Instead, disable the IRQ at the controller
until we have recovered.
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Diffstat (limited to 'drivers/net/ethernet/sfc/nic.c')
| -rw-r--r-- | drivers/net/ethernet/sfc/nic.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/net/ethernet/sfc/nic.c b/drivers/net/ethernet/sfc/nic.c index b0503cd8c2a0..39432d3d1fe9 100644 --- a/drivers/net/ethernet/sfc/nic.c +++ b/drivers/net/ethernet/sfc/nic.c @@ -1579,6 +1579,16 @@ static irqreturn_t efx_legacy_interrupt(int irq, void *dev_id) efx_readd(efx, ®, FR_BZ_INT_ISR0); queues = EFX_EXTRACT_DWORD(reg, 0, 31); + /* Legacy interrupts are disabled too late by the EEH kernel + * code. Disable them earlier. + * If an EEH error occurred, the read will have returned all ones. + */ + if (EFX_DWORD_IS_ALL_ONES(reg) && efx_try_recovery(efx) && + !efx->eeh_disabled_legacy_irq) { + disable_irq_nosync(efx->legacy_irq); + efx->eeh_disabled_legacy_irq = true; + } + /* Handle non-event-queue sources */ if (queues & (1U << efx->irq_level)) { syserr = EFX_OWORD_FIELD(*int_ker, FSF_AZ_NET_IVEC_FATAL_INT); |