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Fixes crash on module unload found by Gal Rosen

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git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@470 d57e44dd-8a1f-0410-8b47-8ef2f437770f
This commit is contained in:
Vladislav Bolkhovitin
2008-07-21 17:01:12 +00:00
parent 0abc311754
commit 4ba14ede19
2 changed files with 14 additions and 3 deletions
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1
qla2x00t/qla_def.h
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@@ -2403,6 +2403,7 @@ typedef struct scsi_qla_host {
struct sns_cmd_pkt *sns_cmd;
dma_addr_t sns_cmd_dma;
spinlock_t dpc_lock;
struct task_struct *dpc_thread;
uint8_t dpc_active; /* DPC routine is active */

16
qla2x00t/qla_os.c
View File

@@ -1498,6 +1498,8 @@ int qla2x00_probe_one(struct pci_dev *pdev, struct qla_board_info *brd_info)
/* load the F/W, read paramaters, and init the H/W */
ha->instance = num_hosts;
spin_lock_init(&ha->dpc_lock);
init_MUTEX(&ha->mbx_cmd_sem);
init_MUTEX_LOCKED(&ha->mbx_intr_sem);
@@ -1660,16 +1662,21 @@ EXPORT_SYMBOL_GPL(qla2x00_probe_one);
static void
qla2x00_stop_dpc_thread(scsi_qla_host_t *ha)
{
if (ha->dpc_thread) {
struct task_struct *t = ha->dpc_thread;
struct task_struct *t = NULL;
spin_lock_irq(&ha->dpc_lock);
if (ha->dpc_thread != NULL) {
t = ha->dpc_thread;
/*
* qla2xxx_wake_dpc checks for ->dpc_thread
* so we need to zero it out.
*/
ha->dpc_thread = NULL;
kthread_stop(t);
}
spin_unlock_irq(&ha->dpc_lock);
if (t != NULL)
kthread_stop(t);
}
void qla2x00_remove_one(struct pci_dev *pdev)
@@ -2417,8 +2424,11 @@ qla2x00_do_dpc(void *data)
void
qla2xxx_wake_dpc(scsi_qla_host_t *ha)
{
unsigned long flags;
spin_lock_irqsave(&ha->dpc_lock, flags);
if (ha->dpc_thread)
wake_up_process(ha->dpc_thread);
spin_unlock_irqrestore(&ha->dpc_lock, flags);
}
/*