[Qemu-devel] [PATCH 1/1] ide/atapi: Mark non-data commands as complete

[John Snow <jsnow@redhat.com>]

When the command completion code in IDE and AHCI
was unified to put all command completion inside
of a callback, "cmd_done," we neglected to
ensure that all AHCI/ATAPI command paths would
eventually register as finished. for the PCI
interface to IDE this is not a problem because
cmd_done is a nop, but the AHCI implementation
needs to send a D2H_REG_FIS and interrupt back
to the guest to inform of completion.

This patch adds calls to ide_set_inactive,
which calls ide_cmd_done, inside of
ide_atapi_cmd_ok and ide_atapi_cmd_error.

This fixes regressions observed by trying to boot QEMU
with a Fedora 20 live CD under Q35/AHCI, which uses
ATAPI command 0x00, which is a status check that may
cause a hang because we never complete, and ATAPI
command 0x56, which is unsupported by our current
implementation and results in an error that we never
report back to the guest.

Signed-off-by: John Snow <jsnow@redhat.com>
---
 hw/ide/atapi.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/hw/ide/atapi.c b/hw/ide/atapi.c
index 3d92b52..3e9ad7b 100644
--- a/hw/ide/atapi.c
+++ b/hw/ide/atapi.c
@@ -134,6 +134,7 @@ void ide_atapi_cmd_ok(IDEState *s)
     s->error = 0;
     s->status = READY_STAT | SEEK_STAT;
     s->nsector = (s->nsector & ~7) | ATAPI_INT_REASON_IO | ATAPI_INT_REASON_CD;
+    ide_set_inactive(s, false);
     ide_set_irq(s->bus);
 }
 
@@ -147,6 +148,7 @@ void ide_atapi_cmd_error(IDEState *s, int sense_key, int asc)
     s->nsector = (s->nsector & ~7) | ATAPI_INT_REASON_IO | ATAPI_INT_REASON_CD;
     s->sense_key = sense_key;
     s->asc = asc;
+    ide_set_inactive(s, false);
     ide_set_irq(s->bus);
 }
 
-- 
1.9.3