Upon receiving a PFVF message, check if the interrupt bit is set in the
message. If it is not, that means that the interrupt was probably
triggered by a collision. In this case, disregard the message and
re-enable the interrupts.
Fixes: ed8ccaef52fa ("crypto: qat - Add support for SRIOV")
Signed-off-by: Giovanni Cabiddu <giovanni.cabiddu@xxxxxxxxx>
Reviewed-by: Marco Chiappero <marco.chiappero@xxxxxxxxx>
---
drivers/crypto/qat/qat_common/adf_pf2vf_msg.c | 6 ++++++
drivers/crypto/qat/qat_common/adf_vf_isr.c | 6 ++++++
2 files changed, 12 insertions(+)
diff --git a/drivers/crypto/qat/qat_common/adf_pf2vf_msg.c b/drivers/crypto/qat/qat_common/adf_pf2vf_msg.c
index 789a4135e28c..5a41beb8f20f 100644
--- a/drivers/crypto/qat/qat_common/adf_pf2vf_msg.c
+++ b/drivers/crypto/qat/qat_common/adf_pf2vf_msg.c
@@ -211,6 +211,11 @@ void adf_vf2pf_req_hndl(struct adf_accel_vf_info *vf_info)
/* Read message from the VF */
msg = ADF_CSR_RD(pmisc_addr, hw_data->get_pf2vf_offset(vf_nr));
+ if (!(msg & ADF_VF2PF_INT)) {
+ dev_info(&GET_DEV(accel_dev),
+ "Spurious VF2PF interrupt, msg %X. Ignored\n", msg);
+ goto out;
+ }
/* To ACK, clear the VF2PFINT bit */
msg &= ~ADF_VF2PF_INT;
@@ -294,6 +299,7 @@ void adf_vf2pf_req_hndl(struct adf_accel_vf_info *vf_info)
if (resp && adf_iov_putmsg(accel_dev, resp, vf_nr))
dev_err(&GET_DEV(accel_dev), "Failed to send response to VF\n");
+out:
/* re-enable interrupt on PF from this VF */
adf_enable_vf2pf_interrupts(accel_dev, (1 << vf_nr));
diff --git a/drivers/crypto/qat/qat_common/adf_vf_isr.c b/drivers/crypto/qat/qat_common/adf_vf_isr.c
index 07f81682c19b..db5e7abbe5f3 100644
--- a/drivers/crypto/qat/qat_common/adf_vf_isr.c
+++ b/drivers/crypto/qat/qat_common/adf_vf_isr.c
@@ -96,6 +96,11 @@ static void adf_pf2vf_bh_handler(void *data)
/* Read the message from PF */
msg = ADF_CSR_RD(pmisc_bar_addr, hw_data->get_pf2vf_offset(0));
+ if (!(msg & ADF_PF2VF_INT)) {
+ dev_info(&GET_DEV(accel_dev),
+ "Spurious PF2VF interrupt, msg %X. Ignored\n", msg);
+ goto out;
+ }
if (!(msg & ADF_PF2VF_MSGORIGIN_SYSTEM))
/* Ignore legacy non-system (non-kernel) PF2VF messages */
@@ -144,6 +149,7 @@ static void adf_pf2vf_bh_handler(void *data)
msg &= ~ADF_PF2VF_INT;
ADF_CSR_WR(pmisc_bar_addr, hw_data->get_pf2vf_offset(0), msg);
+out:
/* Re-enable PF2VF interrupts */
adf_enable_pf2vf_interrupts(accel_dev);
return;
--
2.31.1
