6.6-stable review patch. If anyone has any objections, please let me know.
------------------
From: Giovanni Cabiddu giovanni.cabiddu@intel.com
[ Upstream commit 2c4e8b228733bfbcaf49408fdf94d220f6eb78fc ]
During a warm reset via kexec, the system bypasses the driver removal sequence, meaning that the remove() callback is not invoked. If a QAT device is not shutdown properly, the device driver will fail to load in a newly rebooted kernel.
This might result in output like the following after the kexec reboot:
QAT: AE0 is inactive!! QAT: failed to get device out of reset dh895xcc 0000:3f:00.0: qat_hal_clr_reset error dh895xcc 0000:3f:00.0: Failed to init the AEs dh895xcc 0000:3f:00.0: Failed to initialise Acceleration Engine dh895xcc 0000:3f:00.0: Resetting device qat_dev0 dh895xcc 0000:3f:00.0: probe with driver dh895xcc failed with error -14
Implement the shutdown() handler that hooks into the reboot notifier list. This brings down the QAT device and ensures it is shut down properly.
Cc: stable@vger.kernel.org Fixes: 7afa232e76ce ("crypto: qat - Intel(R) QAT DH895xcc accelerator") Reviewed-by: Ahsan Atta ahsan.atta@intel.com Reviewed-by: Andy Shevchenko andriy.shevchenko@linux.intel.com Signed-off-by: Giovanni Cabiddu giovanni.cabiddu@intel.com Signed-off-by: Herbert Xu herbert@gondor.apana.org.au [ added false parameter to adf_dev_down() call ] Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/crypto/intel/qat/qat_dh895xcc/adf_drv.c | 9 +++++++++ 1 file changed, 9 insertions(+)
--- a/drivers/crypto/intel/qat/qat_dh895xcc/adf_drv.c +++ b/drivers/crypto/intel/qat/qat_dh895xcc/adf_drv.c @@ -27,12 +27,14 @@ MODULE_DEVICE_TABLE(pci, adf_pci_tbl);
static int adf_probe(struct pci_dev *dev, const struct pci_device_id *ent); static void adf_remove(struct pci_dev *dev); +static void adf_shutdown(struct pci_dev *dev);
static struct pci_driver adf_driver = { .id_table = adf_pci_tbl, .name = ADF_DH895XCC_DEVICE_NAME, .probe = adf_probe, .remove = adf_remove, + .shutdown = adf_shutdown, .sriov_configure = adf_sriov_configure, .err_handler = &adf_err_handler, }; @@ -227,6 +229,13 @@ static void adf_remove(struct pci_dev *p kfree(accel_dev); }
+static void adf_shutdown(struct pci_dev *pdev) +{ + struct adf_accel_dev *accel_dev = adf_devmgr_pci_to_accel_dev(pdev); + + adf_dev_down(accel_dev, false); +} + static int __init adfdrv_init(void) { request_module("intel_qat");