diff options
Diffstat (limited to 'drivers/net/ethernet/ibm/ibmvnic.c')
| -rw-r--r-- | drivers/net/ethernet/ibm/ibmvnic.c | 35 |
1 files changed, 26 insertions, 9 deletions
diff --git a/drivers/net/ethernet/ibm/ibmvnic.c b/drivers/net/ethernet/ibm/ibmvnic.c index b423e94956f1..869a4fe17c7c 100644 --- a/drivers/net/ethernet/ibm/ibmvnic.c +++ b/drivers/net/ethernet/ibm/ibmvnic.c @@ -60,6 +60,7 @@ #include <asm/hvcall.h> #include <linux/atomic.h> #include <asm/vio.h> +#include <asm/xive.h> #include <asm/iommu.h> #include <linux/uaccess.h> #include <asm/firmware.h> @@ -3640,6 +3641,30 @@ static int disable_scrq_irq(struct ibmvnic_adapter *adapter, return rc; } +/* We can not use the IRQ chip EOI handler because that has the + * unintended effect of changing the interrupt priority. + */ +static void ibmvnic_xics_eoi(struct device *dev, struct ibmvnic_sub_crq_queue *scrq) +{ + u64 val = 0xff000000 | scrq->hw_irq; + unsigned long rc; + + rc = plpar_hcall_norets(H_EOI, val); + if (rc) + dev_err(dev, "H_EOI FAILED irq 0x%llx. rc=%ld\n", val, rc); +} + +/* Due to a firmware bug, the hypervisor can send an interrupt to a + * transmit or receive queue just prior to a partition migration. + * Force an EOI after migration. + */ +static void ibmvnic_clear_pending_interrupt(struct device *dev, + struct ibmvnic_sub_crq_queue *scrq) +{ + if (!xive_enabled()) + ibmvnic_xics_eoi(dev, scrq); +} + static int enable_scrq_irq(struct ibmvnic_adapter *adapter, struct ibmvnic_sub_crq_queue *scrq) { @@ -3653,15 +3678,7 @@ static int enable_scrq_irq(struct ibmvnic_adapter *adapter, if (test_bit(0, &adapter->resetting) && adapter->reset_reason == VNIC_RESET_MOBILITY) { - u64 val = (0xff000000) | scrq->hw_irq; - - rc = plpar_hcall_norets(H_EOI, val); - /* H_EOI would fail with rc = H_FUNCTION when running - * in XIVE mode which is expected, but not an error. - */ - if (rc && (rc != H_FUNCTION)) - dev_err(dev, "H_EOI FAILED irq 0x%llx. rc=%ld\n", - val, rc); + ibmvnic_clear_pending_interrupt(dev, scrq); } rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, |