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[SCSI] iscsi class: fix gfp use in ping compl and host event 

If a ping or host event were to occur when memory is low
we do not want to use GFP_KERNEL, because the paths
sending them cannot block for data to be written. These
paths might be needed to recover write paths. Use GFP_NOIO
instead.

Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
This commit is contained in:
Mike Christie 2012-03-06 16:09:01 -06:00 committed by James Bottomley
parent 76c8ae4b2f
commit 49d0e64b6a
1 changed files with 4 additions and 4 deletions
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8
drivers/scsi/scsi_transport_iscsi.c
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@ -1486,7 +1486,7 @@ void iscsi_post_host_event(uint32_t host_no, struct iscsi_transport *transport,
struct iscsi_uevent *ev;
int len = NLMSG_SPACE(sizeof(*ev) + data_size);
skb = alloc_skb(len, GFP_KERNEL);
skb = alloc_skb(len, GFP_NOIO);
if (!skb) {
printk(KERN_ERR "gracefully ignored host event (%d):%d OOM\n",
host_no, code);
@ -1504,7 +1504,7 @@ void iscsi_post_host_event(uint32_t host_no, struct iscsi_transport *transport,
if (data_size)
memcpy((char *)ev + sizeof(*ev), data, data_size);
iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_KERNEL);
iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_NOIO);
}
EXPORT_SYMBOL_GPL(iscsi_post_host_event);
@ -1517,7 +1517,7 @@ void iscsi_ping_comp_event(uint32_t host_no, struct iscsi_transport *transport,
struct iscsi_uevent *ev;
int len = NLMSG_SPACE(sizeof(*ev) + data_size);
skb = alloc_skb(len, GFP_KERNEL);
skb = alloc_skb(len, GFP_NOIO);
if (!skb) {
printk(KERN_ERR "gracefully ignored ping comp: OOM\n");
return;
@ -1533,7 +1533,7 @@ void iscsi_ping_comp_event(uint32_t host_no, struct iscsi_transport *transport,
ev->r.ping_comp.data_size = data_size;
memcpy((char *)ev + sizeof(*ev), data, data_size);
iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_KERNEL);
iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_NOIO);
}
EXPORT_SYMBOL_GPL(iscsi_ping_comp_event);