On Wed, Feb 12, 2014 at 09:30:00AM +0100, Sebastian Hesselbarth wrote: > On 02/12/2014 06:28 AM, Kevin Hao wrote: > >On Wed, Feb 12, 2014 at 10:21:58AM +1000, Stephen N Chivers wrote: > >>But, the Interrupt Controller (MPIC) > >>goes AWOL and it is down hill from there. > >> > >>The MPIC is specified in the DTS as: > >> > >> mpic: pic@40000 { > >> interrupt-controller; > >> #address-cells = <0>; > >> #interrupt-cells = <2>; > >> reg = <0x40000 0x40000>; > >> compatible = "chrp,open-pic"; > >> device_type = "open-pic"; > >> big-endian; > >> }; > >> > >>The board support file has the standard mechanism for allocating > >>the PIC: > >> > >> struct mpic *mpic; > >> > >> mpic = mpic_alloc(NULL, 0, 0, 0, 256, " OpenPIC "); > >> BUG_ON(mpic == NULL); > >> > >> mpic_init(mpic); > >> > >>I checked for damage in applying the patch and it has applied > >>correctly. > > > >How about the following fix? > > > >diff --git a/drivers/of/base.c b/drivers/of/base.c > >index ff85450d5683..ca91984d3c4b 100644 > >--- a/drivers/of/base.c > >+++ b/drivers/of/base.c > >@@ -730,32 +730,40 @@ out: > > } > > EXPORT_SYMBOL(of_find_node_with_property); > > > >+static int of_match_type_name(const struct device_node *node, > >+ const struct of_device_id *m) > > I am fine with having a sub-function here, but it should rather be > named of_match_type_or_name. OK. > > >+{ > >+ int match = 1; > >+ > >+ if (m->name[0]) > >+ match &= node->name && !strcmp(m->name, node->name); > >+ > >+ if (m->type[0]) > >+ match &= node->type && !strcmp(m->type, node->type); > >+ > >+ return match; > >+} > [...] > >+ /* Check against matches without compatible string */ > >+ m = matches; > >+ while (!m->compatible[0] && (m->name[0] || m->type[0])) { > > We shouldn't check for anything else than the sentinel here. > Although I guess yours will not quit early as mine did but that > way we don't have to worry about it. Yes, this is still buggy. I will change something like this: m = matches; /* Check against matches without compatible string */ while (m->name[0] || m->type[0] || m->compatible[0]) { if (m->compatible[0]) { m++; continue; } match = of_match_type_name(node, m); if (match) return m; m++; } Thanks, Kevin
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