diff mbox

iscsi: Remove pointless runtime check of macro value

Message ID 1431522928-5292-1-git-send-email-famz@redhat.com
State New
Headers show

Commit Message

Fam Zheng May 13, 2015, 1:15 p.m. UTC
raw_bsd already has QEMU_BUILD_BUG_ON(BDRV_SECTOR_SIZE != 512), so iscsi
should relax.

Signed-off-by: Fam Zheng <famz@redhat.com>
---
 block/iscsi.c | 7 -------
 1 file changed, 7 deletions(-)

Comments

Paolo Bonzini May 13, 2015, 8:43 a.m. UTC | #1
On 13/05/2015 15:15, Fam Zheng wrote:
> raw_bsd already has QEMU_BUILD_BUG_ON(BDRV_SECTOR_SIZE != 512), so iscsi
> should relax.

It's okay to have the same QEMU_BUILD_BUG_ON in different places.
However, you're right that this should be a compile-time check rather
than run-time check.

Paolo

> Signed-off-by: Fam Zheng <famz@redhat.com>
> ---
>  block/iscsi.c | 7 -------
>  1 file changed, 7 deletions(-)
> 
> diff --git a/block/iscsi.c b/block/iscsi.c
> index 8fca1d3..14e97a6 100644
> --- a/block/iscsi.c
> +++ b/block/iscsi.c
> @@ -1323,13 +1323,6 @@ static int iscsi_open(BlockDriverState *bs, QDict *options, int flags,
>      const char *filename;
>      int i, ret = 0;
>  
> -    if ((BDRV_SECTOR_SIZE % 512) != 0) {
> -        error_setg(errp, "iSCSI: Invalid BDRV_SECTOR_SIZE. "
> -                   "BDRV_SECTOR_SIZE(%lld) is not a multiple "
> -                   "of 512", BDRV_SECTOR_SIZE);
> -        return -EINVAL;
> -    }
> -
>      opts = qemu_opts_create(&runtime_opts, NULL, 0, &error_abort);
>      qemu_opts_absorb_qdict(opts, options, &local_err);
>      if (local_err) {
>
Fam Zheng May 13, 2015, 8:52 a.m. UTC | #2
On Wed, 05/13 10:43, Paolo Bonzini wrote:
> 
> 
> On 13/05/2015 15:15, Fam Zheng wrote:
> > raw_bsd already has QEMU_BUILD_BUG_ON(BDRV_SECTOR_SIZE != 512), so iscsi
> > should relax.
> 
> It's okay to have the same QEMU_BUILD_BUG_ON in different places.
> However, you're right that this should be a compile-time check rather
> than run-time check.

I agree with you, but I can't imaging this value could ever change, so there is
little gain to duplicate in this case.

Fam

> 
> Paolo
> 
> > Signed-off-by: Fam Zheng <famz@redhat.com>
> > ---
> >  block/iscsi.c | 7 -------
> >  1 file changed, 7 deletions(-)
> > 
> > diff --git a/block/iscsi.c b/block/iscsi.c
> > index 8fca1d3..14e97a6 100644
> > --- a/block/iscsi.c
> > +++ b/block/iscsi.c
> > @@ -1323,13 +1323,6 @@ static int iscsi_open(BlockDriverState *bs, QDict *options, int flags,
> >      const char *filename;
> >      int i, ret = 0;
> >  
> > -    if ((BDRV_SECTOR_SIZE % 512) != 0) {
> > -        error_setg(errp, "iSCSI: Invalid BDRV_SECTOR_SIZE. "
> > -                   "BDRV_SECTOR_SIZE(%lld) is not a multiple "
> > -                   "of 512", BDRV_SECTOR_SIZE);
> > -        return -EINVAL;
> > -    }
> > -
> >      opts = qemu_opts_create(&runtime_opts, NULL, 0, &error_abort);
> >      qemu_opts_absorb_qdict(opts, options, &local_err);
> >      if (local_err) {
> > 
>
Michael Tokarev May 28, 2015, 11:17 a.m. UTC | #3
13.05.2015 16:15, Fam Zheng wrote:
> raw_bsd already has QEMU_BUILD_BUG_ON(BDRV_SECTOR_SIZE != 512), so iscsi
> should relax.

Applied to -trivial, thank you!

/mjt
diff mbox

Patch

diff --git a/block/iscsi.c b/block/iscsi.c
index 8fca1d3..14e97a6 100644
--- a/block/iscsi.c
+++ b/block/iscsi.c
@@ -1323,13 +1323,6 @@  static int iscsi_open(BlockDriverState *bs, QDict *options, int flags,
     const char *filename;
     int i, ret = 0;
 
-    if ((BDRV_SECTOR_SIZE % 512) != 0) {
-        error_setg(errp, "iSCSI: Invalid BDRV_SECTOR_SIZE. "
-                   "BDRV_SECTOR_SIZE(%lld) is not a multiple "
-                   "of 512", BDRV_SECTOR_SIZE);
-        return -EINVAL;
-    }
-
     opts = qemu_opts_create(&runtime_opts, NULL, 0, &error_abort);
     qemu_opts_absorb_qdict(opts, options, &local_err);
     if (local_err) {