diff options
Diffstat (limited to 'drivers/irqchip')
| -rw-r--r-- | drivers/irqchip/irq-gic-v3-its.c | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/drivers/irqchip/irq-gic-v3-its.c b/drivers/irqchip/irq-gic-v3-its.c index 98144fde1df0..86e4684adeb1 100644 --- a/drivers/irqchip/irq-gic-v3-its.c +++ b/drivers/irqchip/irq-gic-v3-its.c @@ -228,7 +228,7 @@ static struct its_collection *its_build_mapd_cmd(struct its_cmd_block *cmd, struct its_cmd_desc *desc) { unsigned long itt_addr; - u8 size = order_base_2(desc->its_mapd_cmd.dev->nr_ites); + u8 size = ilog2(desc->its_mapd_cmd.dev->nr_ites); itt_addr = virt_to_phys(desc->its_mapd_cmd.dev->itt); itt_addr = ALIGN(itt_addr, ITS_ITT_ALIGN); @@ -1043,11 +1043,18 @@ static struct its_device *its_create_device(struct its_node *its, u32 dev_id, void *itt; int lpi_base; int nr_lpis; + int nr_ites; int cpu; int sz; dev = kzalloc(sizeof(*dev), GFP_KERNEL); - sz = nvecs * its->ite_size; + /* + * At least one bit of EventID is being used, hence a minimum + * of two entries. No, the architecture doesn't let you + * express an ITT with a single entry. + */ + nr_ites = max(2, roundup_pow_of_two(nvecs)); + sz = nr_ites * its->ite_size; sz = max(sz, ITS_ITT_ALIGN) + ITS_ITT_ALIGN - 1; itt = kmalloc(sz, GFP_KERNEL); lpi_map = its_lpi_alloc_chunks(nvecs, &lpi_base, &nr_lpis); @@ -1061,7 +1068,7 @@ static struct its_device *its_create_device(struct its_node *its, u32 dev_id, dev->its = its; dev->itt = itt; - dev->nr_ites = nvecs; + dev->nr_ites = nr_ites; dev->lpi_map = lpi_map; dev->lpi_base = lpi_base; dev->nr_lpis = nr_lpis; |