diff options
| author | Johannes Berg <johannes.berg@intel.com> | 2021-01-22 14:52:41 +0200 |
|---|---|---|
| committer | Kalle Valo <kvalo@codeaurora.org> | 2021-01-25 15:59:24 +0200 |
| commit | 7a21b1d4a728a483f07c638ccd8610d4b4f12684 (patch) | |
| tree | 73a314fd453f4cc7bffc0fd8d6e1ef88948e6c81 /drivers/net/wireless | |
| parent | 4886460c4d1576e85b12601b8b328278a483df86 (diff) | |
| download | linux-7a21b1d4a728a483f07c638ccd8610d4b4f12684.tar.bz2 | |
iwlwifi: mvm: guard against device removal in reprobe
If we get into a problem severe enough to attempt a reprobe,
we schedule a worker to do that. However, if the problem gets
more severe and the device is actually destroyed before this
worker has a chance to run, we use a free device. Bump up the
reference count of the device until the worker runs to avoid
this situation.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/iwlwifi.20210122144849.871f0892e4b2.I94819e11afd68d875f3e242b98bef724b8236f1e@changeid
Diffstat (limited to 'drivers/net/wireless')
| -rw-r--r-- | drivers/net/wireless/intel/iwlwifi/mvm/ops.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/ops.c b/drivers/net/wireless/intel/iwlwifi/mvm/ops.c index 03b41d911338..61618f607927 100644 --- a/drivers/net/wireless/intel/iwlwifi/mvm/ops.c +++ b/drivers/net/wireless/intel/iwlwifi/mvm/ops.c @@ -1209,6 +1209,7 @@ static void iwl_mvm_reprobe_wk(struct work_struct *wk) reprobe = container_of(wk, struct iwl_mvm_reprobe, work); if (device_reprobe(reprobe->dev)) dev_err(reprobe->dev, "reprobe failed!\n"); + put_device(reprobe->dev); kfree(reprobe); module_put(THIS_MODULE); } @@ -1259,7 +1260,7 @@ void iwl_mvm_nic_restart(struct iwl_mvm *mvm, bool fw_error) module_put(THIS_MODULE); return; } - reprobe->dev = mvm->trans->dev; + reprobe->dev = get_device(mvm->trans->dev); INIT_WORK(&reprobe->work, iwl_mvm_reprobe_wk); schedule_work(&reprobe->work); } else if (test_bit(IWL_MVM_STATUS_HW_RESTART_REQUESTED, |