From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:38360) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fQdoo-0000h3-LS for qemu-devel@nongnu.org; Wed, 06 Jun 2018 15:10:03 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1fQdon-0000kO-LF for qemu-devel@nongnu.org; Wed, 06 Jun 2018 15:10:02 -0400 From: John Snow Date: Wed, 6 Jun 2018 15:09:54 -0400 Message-Id: <20180606190955.20845-7-jsnow@redhat.com> In-Reply-To: <20180606190955.20845-1-jsnow@redhat.com> References: <20180606190955.20845-1-jsnow@redhat.com> Subject: [Qemu-devel] [PATCH 6/7] atapi: call ide_set_irq before ide_transfer_start List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-block@nongnu.org, qemu-devel@nongnu.org Cc: John Snow , Paolo Bonzini From: Paolo Bonzini The ATAPI_INT_REASON_IO interrupt is raised when I/O starts, but in the AHCI case ide_set_irq was actually called at the end of a mutual recursion. Move it early, with the side effect that ide_transfer_start becomes a tail call in ide_atapi_cmd_reply_end. Signed-off-by: Paolo Bonzini Signed-off-by: John Snow --- hw/ide/atapi.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/hw/ide/atapi.c b/hw/ide/atapi.c index c0509c8bf5..7168ff55a7 100644 --- a/hw/ide/atapi.c +++ b/hw/ide/atapi.c @@ -287,6 +287,7 @@ void ide_atapi_cmd_reply_end(IDEState *s) } else { /* a new transfer is needed */ s->nsector = (s->nsector & ~7) | ATAPI_INT_REASON_IO; + ide_set_irq(s->bus); byte_count_limit = atapi_byte_count_limit(s); trace_ide_atapi_cmd_reply_end_bcl(s, byte_count_limit); size = s->packet_transfer_size; @@ -304,13 +305,12 @@ void ide_atapi_cmd_reply_end(IDEState *s) if (size > (s->cd_sector_size - s->io_buffer_index)) size = (s->cd_sector_size - s->io_buffer_index); } - s->packet_transfer_size -= size; - s->elementary_transfer_size -= size; - s->io_buffer_index += size; - ide_transfer_start(s, s->io_buffer + s->io_buffer_index - size, - size, ide_atapi_cmd_reply_end); - ide_set_irq(s->bus); trace_ide_atapi_cmd_reply_end_new(s, s->status); + s->packet_transfer_size -= size; + s->elementary_transfer_size -= size; + s->io_buffer_index += size; + ide_transfer_start(s, s->io_buffer + s->io_buffer_index - size, + size, ide_atapi_cmd_reply_end); } } } -- 2.14.3