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78d0f94902
This patch prevents the system from crashing when unloading the ISM module.
How to reproduce: Attach an ISM device and execute 'rmmod ism'.
Error-Log:
- Trying to free already-free IRQ 0
- WARNING: CPU: 1 PID: 966 at kernel/irq/manage.c:1890 free_irq+0x140/0x540
After calling ism_dev_exit() for each ISM device in the exit routine,
pci_unregister_driver() will execute ism_remove() for each ISM device.
Because ism_remove() also calls ism_dev_exit(),
free_irq(pci_irq_vector(pdev, 0), ism) is called twice for each ISM
device. This results in a crash with the error
'Trying to free already-free IRQ'.
In the exit routine, it is enough to call pci_unregister_driver()
because it ensures that ism_dev_exit() is called once per
ISM device.
Cc: <stable@vger.kernel.org> # 6.3+
Fixes:
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|---|---|---|
| .. | ||
| ctcm_dbug.c | ||
| ctcm_dbug.h | ||
| ctcm_fsms.c | ||
| ctcm_fsms.h | ||
| ctcm_main.c | ||
| ctcm_main.h | ||
| ctcm_mpc.c | ||
| ctcm_mpc.h | ||
| ctcm_sysfs.c | ||
| fsm.c | ||
| fsm.h | ||
| ism_drv.c | ||
| ism.h | ||
| Kconfig | ||
| lcs.c | ||
| lcs.h | ||
| Makefile | ||
| netiucv.c | ||
| qeth_core_main.c | ||
| qeth_core_mpc.c | ||
| qeth_core_mpc.h | ||
| qeth_core_sys.c | ||
| qeth_core.h | ||
| qeth_ethtool.c | ||
| qeth_l2_main.c | ||
| qeth_l2_sys.c | ||
| qeth_l2.h | ||
| qeth_l3_main.c | ||
| qeth_l3_sys.c | ||
| qeth_l3.h | ||
| smsgiucv_app.c | ||
| smsgiucv.c | ||
| smsgiucv.h | ||