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| author | Anish Bhatt <anish@chelsio.com> | 2014-09-15 17:44:18 -0700 |
|---|---|---|
| committer | James Bottomley <JBottomley@Parallels.com> | 2014-10-01 13:40:22 -0400 |
| commit | 078efae00ffc76381c3248006e9cf0988163488f (patch) | |
| tree | 59f80cbdbd8f9468c1594eef93f89f90926060b7 /drivers/scsi/cxgbi/libcxgbi.h | |
| parent | 7d1311b93e58ed55f3a31cc8f94c4b8fe988a2b9 (diff) | |
| download | lwn-078efae00ffc76381c3248006e9cf0988163488f.tar.gz lwn-078efae00ffc76381c3248006e9cf0988163488f.zip | |
[SCSI] cxgb4i: avoid holding mutex in interrupt context
cxgbi_inet6addr_handler() can be called in interrupt context, so use rcu
protected list while finding netdev. This is observed as a scheduling in
atomic oops when running over ipv6.
Fixes: fc8d0590d914 ("libcxgbi: Add ipv6 api to driver")
Fixes: 759a0cc5a3e1 ("cxgb4i: Add ipv6 code to driver, call into libcxgbi ipv6 api")
Signed-off-by: Anish Bhatt <anish@chelsio.com>
Signed-off-by: Karen Xie <kxie@chelsio.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Diffstat (limited to 'drivers/scsi/cxgbi/libcxgbi.h')
| -rw-r--r-- | drivers/scsi/cxgbi/libcxgbi.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/scsi/cxgbi/libcxgbi.h b/drivers/scsi/cxgbi/libcxgbi.h index b3e6e7541cc5..1d98fad6a0ab 100644 --- a/drivers/scsi/cxgbi/libcxgbi.h +++ b/drivers/scsi/cxgbi/libcxgbi.h @@ -527,6 +527,7 @@ struct cxgbi_ports_map { #define CXGBI_FLAG_IPV4_SET 0x10 struct cxgbi_device { struct list_head list_head; + struct list_head rcu_node; unsigned int flags; struct net_device **ports; void *lldev; @@ -709,6 +710,8 @@ void cxgbi_device_unregister(struct cxgbi_device *); void cxgbi_device_unregister_all(unsigned int flag); struct cxgbi_device *cxgbi_device_find_by_lldev(void *); struct cxgbi_device *cxgbi_device_find_by_netdev(struct net_device *, int *); +struct cxgbi_device *cxgbi_device_find_by_netdev_rcu(struct net_device *, + int *); int cxgbi_hbas_add(struct cxgbi_device *, u64, unsigned int, struct scsi_host_template *, struct scsi_transport_template *); |