From: Giovanni Cabiddu giovanni.cabiddu@intel.com
stable inclusion from stable-v5.10.94 commit 6a49acfacab5695108ff886a0411190ef5786a97 bugzilla: https://gitee.com/openeuler/kernel/issues/I531X9
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
--------------------------------
[ Upstream commit 5002200b4fedd7e90e4fbc2e5c42a4b3351df814 ]
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 Signed-off-by: Herbert Xu herbert@gondor.apana.org.au Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Zheng Zengkai zhengzengkai@huawei.com Acked-by: Xie XiuQi xiexiuqi@huawei.com --- drivers/crypto/qat/qat_common/adf_pf2vf_msg.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-)
diff --git a/drivers/crypto/qat/qat_common/adf_pf2vf_msg.c b/drivers/crypto/qat/qat_common/adf_pf2vf_msg.c index 7b34273d1893..74afafc84c71 100644 --- a/drivers/crypto/qat/qat_common/adf_pf2vf_msg.c +++ b/drivers/crypto/qat/qat_common/adf_pf2vf_msg.c @@ -132,6 +132,12 @@ 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_IOV_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"); @@ -139,12 +145,6 @@ 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: