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[SCSI] cxgb3i: check for setup netdev 

If the netdev has not been setup when the host is, we will oops when
the iscsi layer calls into the driver and a it tries to reference the
netdev in hba->ndev.

This can happen if the iscsi driver is loaded before ifup is
done. This patch just adds a check, so we can gracefully fail the
operation.

Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
This commit is contained in:
Mike Christie 2010-02-10 16:51:44 -06:00 committed by James Bottomley
parent d9573e7af1
commit 9010b94636
1 changed files with 12 additions and 0 deletions
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12
drivers/scsi/cxgb3i/cxgb3i_iscsi.c
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@ -708,6 +708,12 @@ static int cxgb3i_host_set_param(struct Scsi_Host *shost,
{
struct cxgb3i_hba *hba = iscsi_host_priv(shost);
if (!hba->ndev) {
shost_printk(KERN_ERR, shost, "Could not set host param. "
"Netdev for host not set.\n");
return -ENODEV;
}
cxgb3i_api_debug("param %d, buf %s.\n", param, buf);
switch (param) {
@ -738,6 +744,12 @@ static int cxgb3i_host_get_param(struct Scsi_Host *shost,
struct cxgb3i_hba *hba = iscsi_host_priv(shost);
int len = 0;
if (!hba->ndev) {
shost_printk(KERN_ERR, shost, "Could not set host param. "
"Netdev for host not set.\n");
return -ENODEV;
}
cxgb3i_api_debug("hba %s, param %d.\n", hba->ndev->name, param);
switch (param) {