Merge branch 'stable/bug.fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen
* 'stable/bug.fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen: xen: off by one errors in multicalls.c xen: use the trigger info we already have to choose the irq handler
This commit is contained in:
commit
467701e286
|
@ -189,10 +189,10 @@ struct multicall_space __xen_mc_entry(size_t args)
|
|||
unsigned argidx = roundup(b->argidx, sizeof(u64));
|
||||
|
||||
BUG_ON(preemptible());
|
||||
BUG_ON(b->argidx > MC_ARGS);
|
||||
BUG_ON(b->argidx >= MC_ARGS);
|
||||
|
||||
if (b->mcidx == MC_BATCH ||
|
||||
(argidx + args) > MC_ARGS) {
|
||||
(argidx + args) >= MC_ARGS) {
|
||||
mc_stats_flush(b->mcidx == MC_BATCH ? FL_SLOTS : FL_ARGS);
|
||||
xen_mc_flush();
|
||||
argidx = roundup(b->argidx, sizeof(u64));
|
||||
|
@ -206,7 +206,7 @@ struct multicall_space __xen_mc_entry(size_t args)
|
|||
ret.args = &b->args[argidx];
|
||||
b->argidx = argidx + args;
|
||||
|
||||
BUG_ON(b->argidx > MC_ARGS);
|
||||
BUG_ON(b->argidx >= MC_ARGS);
|
||||
return ret;
|
||||
}
|
||||
|
||||
|
@ -216,7 +216,7 @@ struct multicall_space xen_mc_extend_args(unsigned long op, size_t size)
|
|||
struct multicall_space ret = { NULL, NULL };
|
||||
|
||||
BUG_ON(preemptible());
|
||||
BUG_ON(b->argidx > MC_ARGS);
|
||||
BUG_ON(b->argidx >= MC_ARGS);
|
||||
|
||||
if (b->mcidx == 0)
|
||||
return ret;
|
||||
|
@ -224,14 +224,14 @@ struct multicall_space xen_mc_extend_args(unsigned long op, size_t size)
|
|||
if (b->entries[b->mcidx - 1].op != op)
|
||||
return ret;
|
||||
|
||||
if ((b->argidx + size) > MC_ARGS)
|
||||
if ((b->argidx + size) >= MC_ARGS)
|
||||
return ret;
|
||||
|
||||
ret.mc = &b->entries[b->mcidx - 1];
|
||||
ret.args = &b->args[b->argidx];
|
||||
b->argidx += size;
|
||||
|
||||
BUG_ON(b->argidx > MC_ARGS);
|
||||
BUG_ON(b->argidx >= MC_ARGS);
|
||||
return ret;
|
||||
}
|
||||
|
||||
|
|
|
@ -626,6 +626,9 @@ int xen_allocate_pirq_gsi(unsigned gsi)
|
|||
*
|
||||
* Note: We don't assign an event channel until the irq actually started
|
||||
* up. Return an existing irq if we've already got one for the gsi.
|
||||
*
|
||||
* Shareable implies level triggered, not shareable implies edge
|
||||
* triggered here.
|
||||
*/
|
||||
int xen_bind_pirq_gsi_to_irq(unsigned gsi,
|
||||
unsigned pirq, int shareable, char *name)
|
||||
|
@ -664,16 +667,13 @@ int xen_bind_pirq_gsi_to_irq(unsigned gsi,
|
|||
|
||||
pirq_query_unmask(irq);
|
||||
/* We try to use the handler with the appropriate semantic for the
|
||||
* type of interrupt: if the interrupt doesn't need an eoi
|
||||
* (pirq_needs_eoi returns false), we treat it like an edge
|
||||
* triggered interrupt so we use handle_edge_irq.
|
||||
* As a matter of fact this only happens when the corresponding
|
||||
* physical interrupt is edge triggered or an msi.
|
||||
* type of interrupt: if the interrupt is an edge triggered
|
||||
* interrupt we use handle_edge_irq.
|
||||
*
|
||||
* On the other hand if the interrupt needs an eoi (pirq_needs_eoi
|
||||
* returns true) we treat it like a level triggered interrupt so we
|
||||
* use handle_fasteoi_irq like the native code does for this kind of
|
||||
* On the other hand if the interrupt is level triggered we use
|
||||
* handle_fasteoi_irq like the native code does for this kind of
|
||||
* interrupts.
|
||||
*
|
||||
* Depending on the Xen version, pirq_needs_eoi might return true
|
||||
* not only for level triggered interrupts but for edge triggered
|
||||
* interrupts too. In any case Xen always honors the eoi mechanism,
|
||||
|
@ -681,7 +681,7 @@ int xen_bind_pirq_gsi_to_irq(unsigned gsi,
|
|||
* hasn't received an eoi yet. Therefore using the fasteoi handler
|
||||
* is the right choice either way.
|
||||
*/
|
||||
if (pirq_needs_eoi(irq))
|
||||
if (shareable)
|
||||
irq_set_chip_and_handler_name(irq, &xen_pirq_chip,
|
||||
handle_fasteoi_irq, name);
|
||||
else
|
||||
|
|
Loading…
Reference in a new issue