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wifi: iwl3945: Add missing check for create_singlethread_workqueue

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[ Upstream commit 1fdeb8b9f29dfd64805bb49475ac7566a3cb06cb ]

Add the check for the return value of the create_singlethread_workqueue
in order to avoid NULL pointer dereference.

Fixes: b481de9ca0 ("[IWLWIFI]: add iwlwifi wireless drivers")
Signed-off-by: Jiasheng Jiang <jiasheng@iscas.ac.cn>
Acked-by: Stanislaw Gruszka <stf_xl@wp.pl>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20230208063032.42763-2-jiasheng@iscas.ac.cn
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Jiasheng Jiang 2023-02-08 14:30:32 +08:00 committed by Greg Kroah-Hartman
parent 5de7a4254e
commit 7e594abc04
1 changed files with 12 additions and 4 deletions
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16
drivers/net/wireless/intel/iwlegacy/3945-mac.c
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@ -3382,10 +3382,12 @@ static DEVICE_ATTR(dump_errors, 0200, NULL, il3945_dump_error_log);
*
*****************************************************************************/
static void
static int
il3945_setup_deferred_work(struct il_priv *il)
{
il->workqueue = create_singlethread_workqueue(DRV_NAME);
if (!il->workqueue)
return -ENOMEM;
init_waitqueue_head(&il->wait_command_queue);
@ -3404,6 +3406,8 @@ il3945_setup_deferred_work(struct il_priv *il)
tasklet_init(&il->irq_tasklet,
il3945_irq_tasklet,
(unsigned long)il);
return 0;
}
static void
@ -3725,7 +3729,10 @@ il3945_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
}
il_set_rxon_channel(il, &il->bands[NL80211_BAND_2GHZ].channels[5]);
il3945_setup_deferred_work(il);
err = il3945_setup_deferred_work(il);
if (err)
goto out_remove_sysfs;
il3945_setup_handlers(il);
il_power_initialize(il);
@ -3737,7 +3744,7 @@ il3945_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
err = il3945_setup_mac(il);
if (err)
goto out_remove_sysfs;
goto out_destroy_workqueue;
il_dbgfs_register(il, DRV_NAME);
@ -3746,9 +3753,10 @@ il3945_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
return 0;
out_remove_sysfs:
out_destroy_workqueue:
destroy_workqueue(il->workqueue);
il->workqueue = NULL;
out_remove_sysfs:
sysfs_remove_group(&pdev->dev.kobj, &il3945_attribute_group);
out_release_irq:
free_irq(il->pci_dev->irq, il);