| Message ID | 20161030193557.23862-1-christophe.jaillet@wanadoo.fr (mailing list archive) |
|---|---|
| State | Accepted |
| Headers | show |
Am 30.10.2016 20:35, schrieb Christophe JAILLET: > 'cxl_context_alloc()' does not return an error pointer. It is just a > shortcut for a call to 'kzalloc' with 'sizeof(struct cxl_context)' as the > size parameter. > > So its return value should be compared with NULL. > While fixing it, simplify a bit the code. > > Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr> > --- > un-compiled because I don't have the required cross build environment. > --- > drivers/misc/cxl/api.c | 7 ++----- > 1 file changed, 2 insertions(+), 5 deletions(-) > > diff --git a/drivers/misc/cxl/api.c b/drivers/misc/cxl/api.c > index 2e5233b60971..2b88ad8a2a89 100644 > --- a/drivers/misc/cxl/api.c > +++ b/drivers/misc/cxl/api.c > @@ -30,10 +30,8 @@ struct cxl_context *cxl_dev_context_init(struct pci_dev *dev) > return ERR_CAST(afu); > > ctx = cxl_context_alloc(); > - if (IS_ERR(ctx)) { > - rc = PTR_ERR(ctx); > - goto err_dev; > - } > + if (!ctx) > + return ERR_PTR(-ENOMEM); > So far i see it is only used 2 times, To avoid such problems it should be replaced with kzalloc(sizeof(struct cxl_context), GFP_KERNEL); (from context.c) or even better: ctx = kzalloc(*ctx, GFP_KERNEL); This way the error had been spotted much more early. just my 2 cents, re, wh > ctx->kernelapi = true; > > @@ -61,7 +59,6 @@ struct cxl_context *cxl_dev_context_init(struct pci_dev *dev) > kfree(mapping); > err_ctx: > kfree(ctx); > -err_dev: > return ERR_PTR(rc); > } > EXPORT_SYMBOL_GPL(cxl_dev_context_init);
On 31/10/16 06:35, Christophe JAILLET wrote: > 'cxl_context_alloc()' does not return an error pointer. It is just a > shortcut for a call to 'kzalloc' with 'sizeof(struct cxl_context)' as the > size parameter. > > So its return value should be compared with NULL. > While fixing it, simplify a bit the code. > > Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr> Reviewed-by: Andrew Donnellan <andrew.donnellan@au1.ibm.com> > --- > un-compiled because I don't have the required cross build environment. Compiles on my system!
Le 30/10/2016 à 20:35, Christophe JAILLET a écrit : > 'cxl_context_alloc()' does not return an error pointer. It is just a > shortcut for a call to 'kzalloc' with 'sizeof(struct cxl_context)' as the > size parameter. > > So its return value should be compared with NULL. > While fixing it, simplify a bit the code. > > Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr> > --- Acked-by: Frederic Barrat <fbarrat@linux.vnet.ibm.com>
Acked-by: Ian Munsie <imunsie@au1.ibm.com>
On Sun, 2016-10-30 at 19:35:57 UTC, Christophe Jaillet wrote: > 'cxl_context_alloc()' does not return an error pointer. It is just a > shortcut for a call to 'kzalloc' with 'sizeof(struct cxl_context)' as the > size parameter. > > So its return value should be compared with NULL. > While fixing it, simplify a bit the code. > > Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr> > Reviewed-by: Andrew Donnellan <andrew.donnellan@au1.ibm.com> > Acked-by: Frederic Barrat <fbarrat@linux.vnet.ibm.com> > Acked-by: Ian Munsie <imunsie@au1.ibm.com> Applied to powerpc next, thanks. https://git.kernel.org/powerpc/c/5cd4f5cec2374d2c09299211d2b357 cheers
diff --git a/drivers/misc/cxl/api.c b/drivers/misc/cxl/api.c index 2e5233b60971..2b88ad8a2a89 100644 --- a/drivers/misc/cxl/api.c +++ b/drivers/misc/cxl/api.c @@ -30,10 +30,8 @@ struct cxl_context *cxl_dev_context_init(struct pci_dev *dev) return ERR_CAST(afu); ctx = cxl_context_alloc(); - if (IS_ERR(ctx)) { - rc = PTR_ERR(ctx); - goto err_dev; - } + if (!ctx) + return ERR_PTR(-ENOMEM); ctx->kernelapi = true; @@ -61,7 +59,6 @@ struct cxl_context *cxl_dev_context_init(struct pci_dev *dev) kfree(mapping); err_ctx: kfree(ctx); -err_dev: return ERR_PTR(rc); } EXPORT_SYMBOL_GPL(cxl_dev_context_init);
'cxl_context_alloc()' does not return an error pointer. It is just a shortcut for a call to 'kzalloc' with 'sizeof(struct cxl_context)' as the size parameter. So its return value should be compared with NULL. While fixing it, simplify a bit the code. Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr> --- un-compiled because I don't have the required cross build environment. --- drivers/misc/cxl/api.c | 7 ++----- 1 file changed, 2 insertions(+), 5 deletions(-)