From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: linux-kernel@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
stable@vger.kernel.org, Johannes Berg <johannes.berg@intel.com>,
Luca Coelho <luciano.coelho@intel.com>,
Kalle Valo <kvalo@codeaurora.org>,
Sasha Levin <sashal@kernel.org>
Subject: [PATCH 4.9 07/49] iwlwifi: mvm: guard against device removal in reprobe
Date: Mon, 22 Feb 2021 13:36:05 +0100 [thread overview]
Message-ID: <20210222121024.688887304@linuxfoundation.org> (raw)
In-Reply-To: <20210222121022.546148341@linuxfoundation.org>
From: Johannes Berg <johannes.berg@intel.com>
[ Upstream commit 7a21b1d4a728a483f07c638ccd8610d4b4f12684 ]
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
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/net/wireless/intel/iwlwifi/mvm/ops.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/ops.c b/drivers/net/wireless/intel/iwlwifi/mvm/ops.c
index 6d38eec3f9d3c..a78aaf17116e9 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/ops.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/ops.c
@@ -1104,6 +1104,7 @@ 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);
}
@@ -1202,7 +1203,7 @@ 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 (mvm->cur_ucode == IWL_UCODE_REGULAR) {
--
2.27.0
next prev parent reply other threads:[~2021-02-22 13:39 UTC|newest]
Thread overview: 54+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-22 12:35 [PATCH 4.9 00/49] 4.9.258-rc1 review Greg Kroah-Hartman
2021-02-22 12:35 ` [PATCH 4.9 01/49] mm: memcontrol: fix NULL pointer crash in test_clear_page_writeback() Greg Kroah-Hartman
2021-02-22 12:36 ` [PATCH 4.9 02/49] fgraph: Initialize tracing_graph_pause at task creation Greg Kroah-Hartman
2021-02-22 12:36 ` [PATCH 4.9 03/49] remoteproc: qcom_q6v5_mss: Validate MBA firmware size before load Greg Kroah-Hartman
2021-02-22 12:36 ` [PATCH 4.9 04/49] af_key: relax availability checks for skb size calculation Greg Kroah-Hartman
2021-02-22 12:36 ` [PATCH 4.9 05/49] iwlwifi: mvm: take mutex for calling iwl_mvm_get_sync_time() Greg Kroah-Hartman
2021-02-22 12:36 ` [PATCH 4.9 06/49] iwlwifi: pcie: add a NULL check in iwl_pcie_txq_unmap Greg Kroah-Hartman
2021-02-22 12:36 ` Greg Kroah-Hartman [this message]
2021-02-22 12:36 ` [PATCH 4.9 08/49] SUNRPC: Move simple_get_bytes and simple_get_netobj into private header Greg Kroah-Hartman
2021-02-22 12:36 ` [PATCH 4.9 09/49] SUNRPC: Handle 0 length opaque XDR object data properly Greg Kroah-Hartman
2021-02-22 12:36 ` [PATCH 4.9 10/49] lib/string: Add strscpy_pad() function Greg Kroah-Hartman
2021-02-22 12:36 ` [PATCH 4.9 11/49] include/trace/events/writeback.h: fix -Wstringop-truncation warnings Greg Kroah-Hartman
2021-02-22 12:36 ` [PATCH 4.9 12/49] memcg: fix a crash in wb_workfn when a device disappears Greg Kroah-Hartman
2021-02-22 12:36 ` [PATCH 4.9 13/49] futex: Ensure the correct return value from futex_lock_pi() Greg Kroah-Hartman
2021-02-22 12:36 ` [PATCH 4.9 14/49] futex: Change locking rules Greg Kroah-Hartman
2021-02-22 12:36 ` [PATCH 4.9 15/49] futex: Cure exit race Greg Kroah-Hartman
2021-02-22 12:36 ` [PATCH 4.9 16/49] squashfs: add more sanity checks in id lookup Greg Kroah-Hartman
2021-02-22 12:36 ` [PATCH 4.9 17/49] squashfs: add more sanity checks in inode lookup Greg Kroah-Hartman
2021-02-22 12:36 ` [PATCH 4.9 18/49] squashfs: add more sanity checks in xattr id lookup Greg Kroah-Hartman
2021-02-22 12:36 ` [PATCH 4.9 19/49] tracing: Do not count ftrace events in top level enable output Greg Kroah-Hartman
2021-02-22 12:36 ` [PATCH 4.9 20/49] tracing: Check length before giving out the filter buffer Greg Kroah-Hartman
2021-02-22 12:36 ` [PATCH 4.9 21/49] ovl: skip getxattr of security labels Greg Kroah-Hartman
2021-02-22 12:36 ` [PATCH 4.9 22/49] ARM: dts: lpc32xx: Revert set default clock rate of HCLK PLL Greg Kroah-Hartman
2021-02-22 12:36 ` [PATCH 4.9 23/49] memblock: do not start bottom-up allocations with kernel_end Greg Kroah-Hartman
2021-02-22 12:36 ` [PATCH 4.9 24/49] bpf: Check for integer overflow when using roundup_pow_of_two() Greg Kroah-Hartman
2021-02-22 12:36 ` [PATCH 4.9 25/49] netfilter: xt_recent: Fix attempt to update deleted entry Greg Kroah-Hartman
2021-02-22 12:36 ` [PATCH 4.9 26/49] xen/netback: avoid race in xenvif_rx_ring_slots_available() Greg Kroah-Hartman
2021-02-22 12:36 ` [PATCH 4.9 27/49] netfilter: conntrack: skip identical origin tuple in same zone only Greg Kroah-Hartman
2021-02-22 12:36 ` [PATCH 4.9 28/49] h8300: fix PREEMPTION build, TI_PRE_COUNT undefined Greg Kroah-Hartman
2021-02-22 12:36 ` [PATCH 4.9 29/49] usb: dwc3: ulpi: fix checkpatch warning Greg Kroah-Hartman
2021-02-22 12:36 ` [PATCH 4.9 30/49] usb: dwc3: ulpi: Replace CPU-based busyloop with Protocol-based one Greg Kroah-Hartman
2021-02-22 12:36 ` [PATCH 4.9 31/49] net/vmw_vsock: improve locking in vsock_connect_timeout() Greg Kroah-Hartman
2021-02-22 12:36 ` [PATCH 4.9 32/49] net: watchdog: hold device global xmit lock during tx disable Greg Kroah-Hartman
2021-02-22 12:36 ` [PATCH 4.9 33/49] vsock/virtio: update credit only if socket is not closed Greg Kroah-Hartman
2021-02-22 12:36 ` [PATCH 4.9 34/49] vsock: fix locking in vsock_shutdown() Greg Kroah-Hartman
2021-02-22 12:36 ` [PATCH 4.9 35/49] x86/build: Disable CET instrumentation in the kernel for 32-bit too Greg Kroah-Hartman
2021-02-22 12:36 ` [PATCH 4.9 36/49] trace: Use -mcount-record for dynamic ftrace Greg Kroah-Hartman
2021-02-22 12:36 ` [PATCH 4.9 37/49] tracing: Fix SKIP_STACK_VALIDATION=1 build due to bad merge with -mrecord-mcount Greg Kroah-Hartman
2021-02-22 12:36 ` [PATCH 4.9 38/49] tracing: Avoid calling cc-option -mrecord-mcount for every Makefile Greg Kroah-Hartman
2021-02-22 12:36 ` [PATCH 4.9 39/49] Xen/x86: dont bail early from clear_foreign_p2m_mapping() Greg Kroah-Hartman
2021-02-22 12:36 ` [PATCH 4.9 40/49] Xen/x86: also check kernel mapping in set_foreign_p2m_mapping() Greg Kroah-Hartman
2021-02-22 12:36 ` [PATCH 4.9 41/49] Xen/gntdev: correct dev_bus_addr handling in gntdev_map_grant_pages() Greg Kroah-Hartman
2021-02-22 12:36 ` [PATCH 4.9 42/49] Xen/gntdev: correct error checking " Greg Kroah-Hartman
2021-02-22 12:36 ` [PATCH 4.9 43/49] xen/arm: dont ignore return errors from set_phys_to_machine Greg Kroah-Hartman
2021-02-22 12:36 ` [PATCH 4.9 44/49] xen-blkback: dont "handle" error by BUG() Greg Kroah-Hartman
2021-02-22 12:36 ` [PATCH 4.9 45/49] xen-netback: " Greg Kroah-Hartman
2021-02-22 12:36 ` [PATCH 4.9 46/49] xen-scsiback: " Greg Kroah-Hartman
2021-02-22 12:36 ` [PATCH 4.9 47/49] xen-blkback: fix error handling in xen_blkbk_map() Greg Kroah-Hartman
2021-02-22 12:36 ` [PATCH 4.9 48/49] scsi: qla2xxx: Fix crash during driver load on big endian machines Greg Kroah-Hartman
2021-02-22 12:36 ` [PATCH 4.9 49/49] kvm: check tlbs_dirty directly Greg Kroah-Hartman
2021-02-22 18:24 ` [PATCH 4.9 00/49] 4.9.258-rc1 review Florian Fainelli
2021-02-22 21:27 ` Guenter Roeck
2021-02-23 12:04 ` Naresh Kamboju
2021-02-23 21:19 ` Shuah Khan
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