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ahci: don't schedule unnecessary BH

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The comment gives us a hint. *Maybe* we still have something to
process. Well, why not check?

Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Jeff Cody <jcody@redhat.com>
Message-id: 20180531004323.4611-4-jsnow@redhat.com
Signed-off-by: John Snow <jsnow@redhat.com>
This commit is contained in:
John Snow 2018-06-08 13:17:36 -04:00
parent 5694c7eacc
commit 42af312ade
1 changed files with 1 additions and 2 deletions
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3
hw/ide/ahci.c
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@ -1427,8 +1427,7 @@ static void ahci_cmd_done(IDEDMA *dma)
/* update d2h status */
ahci_write_fis_d2h(ad);
if (!ad->check_bh) {
/* maybe we still have something to process, check later */
if (ad->port_regs.cmd_issue && !ad->check_bh) {
ad->check_bh = qemu_bh_new(ahci_check_cmd_bh, ad);
qemu_bh_schedule(ad->check_bh);
}