On 6/3/19 1:57 PM, Mathieu Malaterre wrote: > On Mon, Jun 3, 2019 at 1:21 PM <shobhitkukreti@xxxxxxxxx> wrote: >> >> From: Shobhit Kukreti <shobhitkukreti@xxxxxxxxx> >> >> Fixed Warning Comparing Pointer to 0. Changed return value to -ENOMEM to >> report kzalloc failure >> >> drivers/video/fbdev/controlfb.c: WARNING comparing pointer to 0 >> drivers/video/fbdev/controlfb.c: WARNING comparing pointer to 0 >> drivers/video/fbdev/controlfb.c: WARNING comparing pointer to 0 >> >> Signed-off-by: Shobhit Kukreti <shobhitkukreti@xxxxxxxxx> >> --- >> Changes in v2: >> - Modified commit message to report change in return type >> >> drivers/video/fbdev/controlfb.c | 8 ++++---- >> 1 file changed, 4 insertions(+), 4 deletions(-) >> >> diff --git a/drivers/video/fbdev/controlfb.c b/drivers/video/fbdev/controlfb.c >> index 7af8db2..07907c5 100644 >> --- a/drivers/video/fbdev/controlfb.c >> +++ b/drivers/video/fbdev/controlfb.c >> @@ -182,7 +182,7 @@ int init_module(void) >> int ret = -ENXIO; >> >> dp = of_find_node_by_name(NULL, "control"); >> - if (dp != 0 && !control_of_init(dp)) >> + if (dp != NULL && !control_of_init(dp)) >> ret = 0; >> of_node_put(dp); >> >> @@ -580,7 +580,7 @@ static int __init control_init(void) >> control_setup(option); >> >> dp = of_find_node_by_name(NULL, "control"); >> - if (dp != 0 && !control_of_init(dp)) >> + if (dp != NULL && !control_of_init(dp)) >> ret = 0; >> of_node_put(dp); >> >> @@ -683,8 +683,8 @@ static int __init control_of_init(struct device_node *dp) >> return -ENXIO; >> } >> p = kzalloc(sizeof(*p), GFP_KERNEL); >> - if (p == 0) >> - return -ENXIO; >> + if (p == NULL) > > nit: I would have use `!p` (same for the others above). Maybe > checkpatch with --strict would warn for those (can't remember from top > of my head). > > Anyway: > > Reviewed-by: Mathieu Malaterre <malat@xxxxxxxxxx> > >> + return -ENOMEM; >> control_fb = p; /* save it for cleanups */ >> >> /* Map in frame buffer and registers */ Patch queued (with some fixups, please see below) for v5.3, thanks. Best regards, -- Bartlomiej Zolnierkiewicz Samsung R&D Institute Poland Samsung Electronics From: Shobhit Kukreti <shobhitkukreti@xxxxxxxxx> Subject: [PATCH] video: fbdev: controlfb: fix warnings about comparing pointer to 0 Fix warnings aboout comparing pointer to 0 reported by coccicheck: drivers/video/fbdev/controlfb.c: WARNING comparing pointer to 0 drivers/video/fbdev/controlfb.c: WARNING comparing pointer to 0 drivers/video/fbdev/controlfb.c: WARNING comparing pointer to 0 Also while at it change return value to -ENOMEM on kzalloc() failure. Signed-off-by: Shobhit Kukreti <shobhitkukreti@xxxxxxxxx> Reviewed-by: Mathieu Malaterre <malat@xxxxxxxxxx> [b.zolnierkie: minor fixups] Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@xxxxxxxxxxx> --- drivers/video/fbdev/controlfb.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) Index: b/drivers/video/fbdev/controlfb.c =================================================================== --- a/drivers/video/fbdev/controlfb.c +++ b/drivers/video/fbdev/controlfb.c @@ -182,7 +182,7 @@ int init_module(void) int ret = -ENXIO; dp = of_find_node_by_name(NULL, "control"); - if (dp != 0 && !control_of_init(dp)) + if (dp && !control_of_init(dp)) ret = 0; of_node_put(dp); @@ -580,7 +580,7 @@ static int __init control_init(void) control_setup(option); dp = of_find_node_by_name(NULL, "control"); - if (dp != 0 && !control_of_init(dp)) + if (dp && !control_of_init(dp)) ret = 0; of_node_put(dp); @@ -683,8 +683,8 @@ static int __init control_of_init(struct return -ENXIO; } p = kzalloc(sizeof(*p), GFP_KERNEL); - if (p == 0) - return -ENXIO; + if (!p) + return -ENOMEM; control_fb = p; /* save it for cleanups */ /* Map in frame buffer and registers */ _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
