AuxXxilium/linux_dsm_epyc7002
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[SPARC]: Fix bus handling in build_device_resources().

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We mistakedly modify 'bus' in the innermost loop.  What
should happen is that at each register index iteration,
we start with the same 'bus'.

So preserve it's value at the top level, and use a loop
local variable 'dbus' for iteration.

This bug causes registers other than the first to be
decoded improperly.

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2007-02-28 23:20:12 -08:00
parent 562aa1d4c6
commit b85cdd490a
2 changed files with 8 additions and 6 deletions
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7
arch/sparc/kernel/of_device.c
View File

@ -495,7 +495,7 @@ static void __init build_device_resources(struct of_device *op,
u32 *reg = (preg + (index * ((na + ns) * 4)));
struct device_node *dp = op->node;
struct device_node *pp = p_op->node;
struct of_bus *pbus;
struct of_bus *pbus, *dbus;
u64 size, result = OF_BAD_ADDR;
unsigned long flags;
int dna, dns;
@ -516,6 +516,7 @@ static void __init build_device_resources(struct of_device *op,
dna = na;
dns = ns;
dbus = bus;
while (1) {
dp = pp;
@ -528,13 +529,13 @@ static void __init build_device_resources(struct of_device *op,
pbus = of_match_bus(pp);
pbus->count_cells(dp, &pna, &pns);
if (build_one_resource(dp, bus, pbus, addr,
if (build_one_resource(dp, dbus, pbus, addr,
dna, dns, pna))
break;
dna = pna;
dns = pns;
bus = pbus;
dbus = pbus;
}
build_res:

7
arch/sparc64/kernel/of_device.c
View File

@ -581,7 +581,7 @@ static void __init build_device_resources(struct of_device *op,
u32 *reg = (preg + (index * ((na + ns) * 4)));
struct device_node *dp = op->node;
struct device_node *pp = p_op->node;
struct of_bus *pbus;
struct of_bus *pbus, *dbus;
u64 size, result = OF_BAD_ADDR;
unsigned long flags;
int dna, dns;
@ -599,6 +599,7 @@ static void __init build_device_resources(struct of_device *op,
dna = na;
dns = ns;
dbus = bus;
while (1) {
dp = pp;
@ -611,13 +612,13 @@ static void __init build_device_resources(struct of_device *op,
pbus = of_match_bus(pp);
pbus->count_cells(dp, &pna, &pns);
if (build_one_resource(dp, bus, pbus, addr,
if (build_one_resource(dp, dbus, pbus, addr,
dna, dns, pna))
break;
dna = pna;
dns = pns;
bus = pbus;
dbus = pbus;
}
build_res: