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Re: [Qemu-block] [PATCH v2 5/8] scsi: move unmap error checking to the c

From: Alberto Garcia
Subject: Re: [Qemu-block] [PATCH v2 5/8] scsi: move unmap error checking to the complete callback
Date: Wed, 07 Feb 2018 16:00:56 +0100
User-agent: Notmuch/0.18.2 (http://notmuchmail.org) Emacs/24.4.1 (i586-pc-linux-gnu)

On Fri 19 Jan 2018 01:50:04 PM CET, Anton Nefedov wrote:
> This will help to account the operation in the following commit.
> The difference is that we don't call scsi_disk_req_check_error() before
> the 1st discard iteration anymore. That function also checks if
> the request is cancelled, however it shouldn't get canceled until it
> yields in blk_aio() functions anyway.
> Same approach is already used for emulate_write_same.
> Signed-off-by: Anton Nefedov <address@hidden>
> Reviewed-by: Vladimir Sementsov-Ogievskiy <address@hidden>

Reviewed-by: Alberto Garcia <address@hidden>

> @@ -1665,7 +1662,12 @@ static void scsi_unmap_complete(void *opaque, int ret)
>      r->req.aiocb = NULL;
>      aio_context_acquire(blk_get_aio_context(s->qdev.conf.blk));
> -    scsi_unmap_complete_noio(data, ret);
> +    if (scsi_disk_req_check_error(r, ret, false)) {
> +        scsi_req_unref(&r->req);
> +        g_free(data);

It would be nice not to have the cleanup code duplicated here, but I
don't see any obvious alternative.


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