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libata: fix probe_ent alloc/free bugs 

ata_probe_ent_alloc() had a temporary hack such that devm_kzalloc()
was used for allocation if devres had been previously initialized on
the device; otherwise, plain kzalloc() was used.  This was to make the
code useable from both the old and devres-aware libata drivers during
transition.  This hack made ata_sas_port_alloc() unable to determine
how the probe_ent is allocated, causing double free in some cases.

Remove the now-unneeded hack and make ata_sas_port_alloc() use
devm_kfree().

Signed-off-by: Tejun Heo <htejun@gmail.com>
Cc: James Bottomley <James.Bottomley@SteelEye.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Tejun Heo 2007-02-18 02:24:37 +09:00 committed by Jeff Garzik
parent 8d9db2d2fb
commit 4d05447ec7
2 changed files with 2 additions and 6 deletions
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6
drivers/ata/libata-core.c
View File

@ -5948,11 +5948,7 @@ ata_probe_ent_alloc(struct device *dev, const struct ata_port_info *port)
{
struct ata_probe_ent *probe_ent;
/* XXX - the following if can go away once all LLDs are managed */
if (!list_empty(&dev->devres_head))
probe_ent = devm_kzalloc(dev, sizeof(*probe_ent), GFP_KERNEL);
else
probe_ent = kzalloc(sizeof(*probe_ent), GFP_KERNEL);
probe_ent = devm_kzalloc(dev, sizeof(*probe_ent), GFP_KERNEL);
if (!probe_ent) {
printk(KERN_ERR DRV_NAME "(%s): out of memory\n",
kobject_name(&(dev->kobj)));

2
drivers/ata/libata-scsi.c
View File

@ -3235,7 +3235,7 @@ struct ata_port *ata_sas_port_alloc(struct ata_host *host,
ata_port_init(ap, host, ent, 0);
ap->lock = shost->host_lock;
kfree(ent);
devm_kfree(host->dev, ent);
return ap;
}
EXPORT_SYMBOL_GPL(ata_sas_port_alloc);