@@ -107,6 +107,12 @@ static int __adf_iov_putmsg(struct adf_accel_dev *accel_dev, u32 msg, u8 vf_nr)
val = ADF_CSR_RD(pmisc_bar_addr, pf2vf_offset);
} while ((val & int_bit) && (count++ < ADF_PFVF_MSG_ACK_MAX_RETRY));
+ if (val & int_bit) {
+ dev_dbg(&GET_DEV(accel_dev), "ACK not received from remote\n");
+ val &= ~int_bit;
+ ret = -EIO;
+ }
+
if (val != msg) {
dev_dbg(&GET_DEV(accel_dev),
"Collision - PFVF CSR overwritten by remote function\n");
@@ -114,12 +120,6 @@ static int __adf_iov_putmsg(struct adf_accel_dev *accel_dev, u32 msg, u8 vf_nr)
goto out;
}
- if (val & int_bit) {
- dev_dbg(&GET_DEV(accel_dev), "ACK not received from remote\n");
- val &= ~int_bit;
- ret = -EIO;
- }
-
/* Finished with the PFVF CSR; relinquish it and leave msg in CSR */
ADF_CSR_WR(pmisc_bar_addr, pf2vf_offset, val & ~local_in_use_mask);
out:
If the remote function did not ACK the reception of a message, the function __adf_iov_putmsg() could detect it as a collision. This was due to the fact that the collision and the timeout checks after the ACK loop were in the wrong order. The timeout must be checked at the end of the loop, so fix by swapping the order of the two checks. Fixes: 9b768e8a3909 ("crypto: qat - detect PFVF collision after ACK") Signed-off-by: Giovanni Cabiddu <giovanni.cabiddu@intel.com> Co-developed-by: Marco Chiappero <marco.chiappero@intel.com> Signed-off-by: Marco Chiappero <marco.chiappero@intel.com> --- drivers/crypto/qat/qat_common/adf_pf2vf_msg.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-)