* Andrew Morton <[email protected]> wrote:
> > @@ -3730,7 +3730,7 @@ tracing_stats_read(struct file *filp, char __user
> > *ubuf,
> >
> > s = kmalloc(sizeof(*s), GFP_KERNEL);
> > if (!s)
> > - return ENOMEM;
> > + return -ENOMEM;
> >
> > trace_seq_init(s);
> >
>
> lol, there we go again.
>
> Andy, can we have a checkpatch rule please?
Note, that will upset creative uses of error codes i guess, such as
fs/xfs/.
But yeah, +1 from me too.
Ob'post'mortem - looked for similar patterns in the kernel and there's
quite a few bugs there:
include/net/inet_hashtables.h: return ENOMEM; # bug
drivers/scsi/aic7xxx/aic7xxx_osm.c: return ENOMEM; # works
but weird
drivers/scsi/cxgb3i/cxgb3i_offload.c: return ENOMEM; # works
but weird
fs/ocfs2/dlm/dlmrecovery.c: return EAGAIN; # bug
drivers/block/cciss_scsi.c: return ENXIO; # works
but weird
drivers/gpu/drm/radeon/radeon_irq.c: return EINVAL; # bug
drivers/gpu/drm/radeon/radeon_irq.c: return EINVAL; # bug
drivers/isdn/hardware/mISDN/hfcmulti.c: return EINVAL; # bug
5 out of 8 places look buggy - i.e. more than 60% - a checkpatch warning
would avoid real bugs here. (even ignoring the cleanliness effects of
using proper error propagation)
Cc:-ed affected maintainers. The rightmost column are my observations.
Below is the patch fixing these.
Ingo
Signed-off-by: Ingo Molnar <[email protected]>
---
drivers/gpu/drm/radeon/radeon_irq.c | 4 ++--
drivers/isdn/hardware/mISDN/hfcmulti.c | 2 +-
fs/ocfs2/dlm/dlmrecovery.c | 2 +-
include/net/inet_hashtables.h | 2 +-
4 files changed, 5 insertions(+), 5 deletions(-)
diff --git a/drivers/gpu/drm/radeon/radeon_irq.c
b/drivers/gpu/drm/radeon/radeon_irq.c
index b79ecc4..fbbc0a1 100644
--- a/drivers/gpu/drm/radeon/radeon_irq.c
+++ b/drivers/gpu/drm/radeon/radeon_irq.c
@@ -76,7 +76,7 @@ int radeon_enable_vblank(struct drm_device *dev, int crtc)
default:
DRM_ERROR("tried to enable vblank on non-existent crtc
%d\n",
crtc);
- return EINVAL;
+ return -EINVAL;
}
} else {
switch (crtc) {
@@ -89,7 +89,7 @@ int radeon_enable_vblank(struct drm_device *dev, int crtc)
default:
DRM_ERROR("tried to enable vblank on non-existent crtc
%d\n",
crtc);
- return EINVAL;
+ return -EINVAL;
}
}
diff --git a/drivers/isdn/hardware/mISDN/hfcmulti.c
b/drivers/isdn/hardware/mISDN/hfcmulti.c
index faed794..cfb45c9 100644
--- a/drivers/isdn/hardware/mISDN/hfcmulti.c
+++ b/drivers/isdn/hardware/mISDN/hfcmulti.c
@@ -2846,7 +2846,7 @@ mode_hfcmulti(struct hfc_multi *hc, int ch, int protocol,
int slot_tx,
int conf;
if (ch < 0 || ch > 31)
- return EINVAL;
+ return -EINVAL;
oslot_tx = hc->chan[ch].slot_tx;
oslot_rx = hc->chan[ch].slot_rx;
conf = hc->chan[ch].conf;
diff --git a/fs/ocfs2/dlm/dlmrecovery.c b/fs/ocfs2/dlm/dlmrecovery.c
index d9fa3d2..0a8a6a4 100644
--- a/fs/ocfs2/dlm/dlmrecovery.c
+++ b/fs/ocfs2/dlm/dlmrecovery.c
@@ -2639,7 +2639,7 @@ int dlm_begin_reco_handler(struct o2net_msg *msg, u32
len, void *data,
dlm->name, br->node_idx, br->dead_node,
dlm->reco.dead_node, dlm->reco.new_master);
spin_unlock(&dlm->spinlock);
- return EAGAIN;
+ return -EAGAIN;
}
spin_unlock(&dlm->spinlock);
diff --git a/include/net/inet_hashtables.h b/include/net/inet_hashtables.h
index d522dcf..5e31447 100644
--- a/include/net/inet_hashtables.h
+++ b/include/net/inet_hashtables.h
@@ -193,7 +193,7 @@ static inline int inet_ehash_locks_alloc(struct
inet_hashinfo *hashinfo)
hashinfo->ehash_locks = kmalloc(size * sizeof(spinlock_t),
GFP_KERNEL);
if (!hashinfo->ehash_locks)
- return ENOMEM;
+ return -ENOMEM;
for (i = 0; i < size; i++)
spin_lock_init(&hashinfo->ehash_locks[i]);
}
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