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vhost/scsi: Use GFP_ATOMIC with percpu_ida_alloc for obtaining tag
Fix GFP_KERNEL -> GFP_ATOMIC usage of percpu_ida_alloc() within vhost_scsi_get_tag(), as this code is expected to be called directly from interrupt context. v2 changes: - Handle possible tag < 0 failure with GFP_ATOMIC Acked-by: Michael S. Tsirkin <mst@redhat.com> Acked-by: Asias He <asias@redhat.com> Cc: Kent Overstreet <kmo@daterainc.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
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@ -728,7 +728,12 @@ vhost_scsi_get_tag(struct vhost_virtqueue *vq,
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}
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se_sess = tv_nexus->tvn_se_sess;
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tag = percpu_ida_alloc(&se_sess->sess_tag_pool, GFP_KERNEL);
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tag = percpu_ida_alloc(&se_sess->sess_tag_pool, GFP_ATOMIC);
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if (tag < 0) {
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pr_err("Unable to obtain tag for tcm_vhost_cmd\n");
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return ERR_PTR(-ENOMEM);
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}
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cmd = &((struct tcm_vhost_cmd *)se_sess->sess_cmd_map)[tag];
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sg = cmd->tvc_sgl;
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pages = cmd->tvc_upages;
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