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cciss: fix scatter gather cleanup problems

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On driver unload, only free up the extra scatter gather data if they were
allocated in the first place (the controller supports it) and don't forget
to free up the sg_cmd_list array of pointers.

Signed-off-by: Don Brace <brace@beardog.cce.hp.com>
Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
This commit is contained in:
Stephen M. Cameron 2009-11-23 09:31:48 +01:00 committed by Jens Axboe
parent 87038c2d5b
commit d61c42690c
1 changed files with 18 additions and 7 deletions
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13
drivers/block/cciss.c
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@ -4326,11 +4326,16 @@ clean4:
for (k = 0; k < hba[i]->nr_cmds; k++)
kfree(hba[i]->scatter_list[k]);
kfree(hba[i]->scatter_list);
/* Only free up extra s/g lists if controller supports them */
if (hba[i]->chainsize > 0) {
for (j = 0; j < hba[i]->nr_cmds; j++) {
if (hba[i]->cmd_sg_list[j])
if (hba[i]->cmd_sg_list[j]) {
kfree(hba[i]->cmd_sg_list[j]->sgchain);
kfree(hba[i]->cmd_sg_list[j]);
}
}
kfree(hba[i]->cmd_sg_list);
}
if (hba[i]->cmd_pool)
pci_free_consistent(hba[i]->pdev,
hba[i]->nr_cmds * sizeof(CommandList_struct),
@ -4448,10 +4453,16 @@ static void __devexit cciss_remove_one(struct pci_dev *pdev)
for (j = 0; j < hba[i]->nr_cmds; j++)
kfree(hba[i]->scatter_list[j]);
kfree(hba[i]->scatter_list);
/* Only free up extra s/g lists if controller supports them */
if (hba[i]->chainsize > 0) {
for (j = 0; j < hba[i]->nr_cmds; j++) {
if (hba[i]->cmd_sg_list[j]) {
kfree(hba[i]->cmd_sg_list[j]->sgchain);
kfree(hba[i]->cmd_sg_list[j]);
}
}
kfree(hba[i]->cmd_sg_list);
}
/*
* Deliberately omit pci_disable_device(): it does something nasty to
* Smart Array controllers that pci_enable_device does not undo