crypto: qat - handle both source of interrupt in VF ISR

[ Upstream commit 0a73c762e1eee33a5e5dc0e3488f1b7cd17249b3 ]

The top half of the VF drivers handled only a source at the time.
If an interrupt for PF2VF and bundle occurred at the same time, the ISR
scheduled only the bottom half for PF2VF.
This patch fixes the VF top half so that if both sources of interrupt
trigger at the same time, both bottom halves are scheduled.

This patch is based on earlier work done by Conor McLoughlin.

Signed-off-by: Giovanni Cabiddu <giovanni.cabiddu@intel.com>
Reviewed-by: Marco Chiappero <marco.chiappero@intel.com>
Reviewed-by: Fiona Trahe <fiona.trahe@intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/crypto/qat/qat_common/adf_vf_isr.c b/drivers/crypto/qat/qat_common/adf_vf_isr.c
index 4c1217ba83ae8a42317aea58f6344c90df15bb3f..36db3c443e7e4ad172d6605ab5d33092ccaa5cae 100644 (file)
--- a/drivers/crypto/qat/qat_common/adf_vf_isr.c
+++ b/drivers/crypto/qat/qat_common/adf_vf_isr.c
@@ -203,6 +203,7 @@ static irqreturn_t adf_isr(int irq, void *privdata)
        struct adf_bar *pmisc =
                        &GET_BARS(accel_dev)[hw_data->get_misc_bar_id(hw_data)];
        void __iomem *pmisc_bar_addr = pmisc->virt_addr;
+       bool handled = false;
        u32 v_int;
 
        /* Read VF INT source CSR to determine the source of VF interrupt */
@@ -215,7 +216,7 @@ static irqreturn_t adf_isr(int irq, void *privdata)
 
                /* Schedule tasklet to handle interrupt BH */
                tasklet_hi_schedule(&accel_dev->vf.pf2vf_bh_tasklet);
-               return IRQ_HANDLED;
+               handled = true;
        }
 
        /* Check bundle interrupt */
@@ -227,10 +228,10 @@ static irqreturn_t adf_isr(int irq, void *privdata)
                WRITE_CSR_INT_FLAG_AND_COL(bank->csr_addr, bank->bank_number,
                                           0);
                tasklet_hi_schedule(&bank->resp_handler);
-               return IRQ_HANDLED;
+               handled = true;
        }
 
-       return IRQ_NONE;
+       return handled ? IRQ_HANDLED : IRQ_NONE;
 }
 
 static int adf_request_msi_irq(struct adf_accel_dev *accel_dev)