Commit bbe3def3 authored by Sreekanth Reddy's avatar Sreekanth Reddy Committed by Martin K. Petersen
Browse files

scsi: mpt3sas: Fixed memory leaks in driver 



While removing Expander devices, we are removing expander device entry
from the list before freeing its child devices. While freeing child
device we are finding its parent device node as NULL and therefore we
are not freeing the child device's allocated data structures.  Updated
the driver to remove the expander device from the list only after
freeing all its child devices.

[mkp: clarified commit message]

Signed-off-by: default avatarSreekanth Reddy <Sreekanth.Reddy@broadcom.com>
Reviewed-by: default avatarTomas Henzl <thenzl@redhat.com>
Signed-off-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
parent b99b1993

drivers/scsi/mpt3sas/mpt3sas_scsih.c

+5 −4
Original line number Diff line number Diff line
@@ -5274,8 +5274,6 @@ mpt3sas_expander_remove(struct MPT3SAS_ADAPTER *ioc, u64 sas_address) 
	spin_lock_irqsave(&ioc->sas_node_lock, flags);

	sas_expander = mpt3sas_scsih_expander_find_by_sas_address(ioc,

	    sas_address);

	if (sas_expander)

		list_del(&sas_expander->list);

	spin_unlock_irqrestore(&ioc->sas_node_lock, flags);

	if (sas_expander)

		_scsih_expander_node_remove(ioc, sas_expander);
@@ -7476,7 +7474,6 @@ _scsih_remove_unresponding_sas_devices(struct MPT3SAS_ADAPTER *ioc) 
	spin_unlock_irqrestore(&ioc->sas_node_lock, flags);

	list_for_each_entry_safe(sas_expander, sas_expander_next, &tmp_list,

	    list) {

		list_del(&sas_expander->list);

		_scsih_expander_node_remove(ioc, sas_expander);

	}
@@ -8102,7 +8099,6 @@ mpt3sas_scsih_event_callback(struct MPT3SAS_ADAPTER *ioc, u8 msix_index, 
 * _scsih_expander_node_remove - removing expander device from list.

 * @ioc: per adapter object

 * @sas_expander: the sas_device object

 * Context: Calling function should acquire ioc->sas_node_lock.

 *

 * Removing object and freeing associated memory from the

 * ioc->sas_expander_list.
@@ -8114,6 +8110,7 @@ _scsih_expander_node_remove(struct MPT3SAS_ADAPTER *ioc, 
	struct _sas_node *sas_expander)

{

	struct _sas_port *mpt3sas_port, *next;

	unsigned long flags;



	/* remove sibling ports attached to this expander */

	list_for_each_entry_safe(mpt3sas_port, next,
@@ -8141,6 +8138,10 @@ _scsih_expander_node_remove(struct MPT3SAS_ADAPTER *ioc, 
	    sas_expander->handle, (unsigned long long)

	    sas_expander->sas_address);



	spin_lock_irqsave(&ioc->sas_node_lock, flags);

	list_del(&sas_expander->list);

	spin_unlock_irqrestore(&ioc->sas_node_lock, flags);



	kfree(sas_expander->phy);

	kfree(sas_expander);

}

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