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wifi: iwl4965: Add missing check for create_singlethread_workqueue()

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[ Upstream commit 26e6775f75517ad6844fe5b79bc5f3fa8c22ee61 ]

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/20230209010748.45454-1-jiasheng@iscas.ac.cn
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Jiasheng Jiang 2023-02-09 09:07:48 +08:00 committed by Greg Kroah-Hartman
parent 7e594abc04
commit c002d27414
1 changed files with 10 additions and 2 deletions
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12
drivers/net/wireless/intel/iwlegacy/4965-mac.c
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@ -6217,10 +6217,12 @@ out:
mutex_unlock(&il->mutex);
}
static void
static int
il4965_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);
@ -6241,6 +6243,8 @@ il4965_setup_deferred_work(struct il_priv *il)
tasklet_init(&il->irq_tasklet,
il4965_irq_tasklet,
(unsigned long)il);
return 0;
}
static void
@ -6630,7 +6634,10 @@ il4965_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
goto out_disable_msi;
}
il4965_setup_deferred_work(il);
err = il4965_setup_deferred_work(il);
if (err)
goto out_free_irq;
il4965_setup_handlers(il);
/*********************************************
@ -6668,6 +6675,7 @@ il4965_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
out_destroy_workqueue:
destroy_workqueue(il->workqueue);
il->workqueue = NULL;
out_free_irq:
free_irq(il->pci_dev->irq, il);
out_disable_msi:
pci_disable_msi(il->pci_dev);