“751930cb1d6da7b7891d8ffe84877cbf21915e0d”上不存在“README.md”
提交 c34aeebc 编写于 作者: J James Bottomley 提交者: Jeff Garzik

libata: fix eh locking

The SCSI host eh_cmd_q should be protected by the host lock (not the
port lock).  This probably doesn't matter that much at the moment,
since we try to serialise the add and eh pieces, but it might matter
in future for more convenient error handling.  Plus this switches
libata to the standard eh pattern where you lock, remove from the cmd
queue to a local list and unlock and then operate on the local list.
Signed-off-by: NJames Bottomley <James.Bottomley@suse.de>
Signed-off-by: NJeff Garzik <jgarzik@redhat.com>
上级 a29b5dad
无相关合并请求
......@@ -589,9 +589,14 @@ void ata_scsi_error(struct Scsi_Host *host)
struct ata_port *ap = ata_shost_to_port(host);
int i;
unsigned long flags;
LIST_HEAD(eh_work_q);
DPRINTK("ENTER\n");
spin_lock_irqsave(host->host_lock, flags);
list_splice_init(&host->eh_cmd_q, &eh_work_q);
spin_unlock_irqrestore(host->host_lock, flags);
/* make sure sff pio task is not running */
ata_sff_flush_pio_task(ap);
......@@ -627,7 +632,7 @@ void ata_scsi_error(struct Scsi_Host *host)
if (ap->ops->lost_interrupt)
ap->ops->lost_interrupt(ap);
list_for_each_entry_safe(scmd, tmp, &host->eh_cmd_q, eh_entry) {
list_for_each_entry_safe(scmd, tmp, &eh_work_q, eh_entry) {
struct ata_queued_cmd *qc;
for (i = 0; i < ATA_MAX_QUEUE; i++) {
......@@ -762,7 +767,7 @@ void ata_scsi_error(struct Scsi_Host *host)
}
/* finish or retry handled scmd's and clean up */
WARN_ON(host->host_failed || !list_empty(&host->eh_cmd_q));
WARN_ON(host->host_failed || !list_empty(&eh_work_q));
scsi_eh_flush_done_q(&ap->eh_done_q);
......
Markdown is supported
0% .
You are about to add 0 people to the discussion. Proceed with caution.
先完成此消息的编辑!
想要评论请 注册
反馈
建议
客服 返回
顶部