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[S390] qdio: make sure data structures are correctly aligned. 

The slsb structure contained at the beginning of the qdio_q structure
must start on a 256 byte boundary. To make sure this is the case even
if slab debugging is turned on create an own slab cache for qdio_q
structures.
Besides that don't use the slab allocator to allocate whole pages. Use
the page allocator instead.
Also fix a few memory leaks in error handling code.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
hifive-unleashed-5.1
Heiko Carstens 2007-08-10 14:32:28 +02:00 committed by Martin Schwidefsky
parent b01af5ba91
commit c6d0e8014a
1 changed files with 47 additions and 45 deletions
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92
drivers/s390/cio/qdio.c
View File

@ -81,6 +81,7 @@ static __u32 volatile spare_indicator;
static atomic_t spare_indicator_usecount;
#define QDIO_MEMPOOL_SCSSC_ELEMENTS 2
static mempool_t *qdio_mempool_scssc;
static struct kmem_cache *qdio_q_cache;
static debug_info_t *qdio_dbf_setup;
static debug_info_t *qdio_dbf_sbal;
@ -1617,23 +1618,21 @@ static void
qdio_release_irq_memory(struct qdio_irq *irq_ptr)
{
int i;
struct qdio_q *q;
for (i=0;i<QDIO_MAX_QUEUES_PER_IRQ;i++) {
if (!irq_ptr->input_qs[i])
goto next;
kfree(irq_ptr->input_qs[i]->slib);
kfree(irq_ptr->input_qs[i]);
next:
if (!irq_ptr->output_qs[i])
continue;
kfree(irq_ptr->output_qs[i]->slib);
kfree(irq_ptr->output_qs[i]);
for (i = 0; i < QDIO_MAX_QUEUES_PER_IRQ; i++) {
q = irq_ptr->input_qs[i];
if (q) {
free_page((unsigned long) q->slib);
kmem_cache_free(qdio_q_cache, q);
}
q = irq_ptr->output_qs[i];
if (q) {
free_page((unsigned long) q->slib);
kmem_cache_free(qdio_q_cache, q);
}
}
kfree(irq_ptr->qdr);
free_page((unsigned long) irq_ptr->qdr);
free_page((unsigned long) irq_ptr);
}
@ -1680,44 +1679,35 @@ qdio_alloc_qs(struct qdio_irq *irq_ptr,
{
int i;
struct qdio_q *q;
int result=-ENOMEM;
for (i=0;i<no_input_qs;i++) {
q = kzalloc(sizeof(struct qdio_q), GFP_KERNEL);
for (i = 0; i < no_input_qs; i++) {
q = kmem_cache_alloc(qdio_q_cache, GFP_KERNEL);
if (!q)
return -ENOMEM;
memset(q, 0, sizeof(*q));
if (!q) {
QDIO_PRINT_ERR("kmalloc of q failed!\n");
goto out;
}
q->slib = kmalloc(PAGE_SIZE, GFP_KERNEL);
q->slib = (struct slib *) __get_free_page(GFP_KERNEL);
if (!q->slib) {
QDIO_PRINT_ERR("kmalloc of slib failed!\n");
goto out;
kmem_cache_free(qdio_q_cache, q);
return -ENOMEM;
}
irq_ptr->input_qs[i]=q;
}
for (i=0;i<no_output_qs;i++) {
q = kzalloc(sizeof(struct qdio_q), GFP_KERNEL);
for (i = 0; i < no_output_qs; i++) {
q = kmem_cache_alloc(qdio_q_cache, GFP_KERNEL);
if (!q)
return -ENOMEM;
memset(q, 0, sizeof(*q));
if (!q) {
goto out;
}
q->slib=kmalloc(PAGE_SIZE,GFP_KERNEL);
q->slib = (struct slib *) __get_free_page(GFP_KERNEL);
if (!q->slib) {
QDIO_PRINT_ERR("kmalloc of slib failed!\n");
goto out;
kmem_cache_free(qdio_q_cache, q);
return -ENOMEM;
}
irq_ptr->output_qs[i]=q;
}
result=0;
out:
return result;
return 0;
}
static void
@ -2985,17 +2975,17 @@ qdio_allocate(struct qdio_initialize *init_data)
QDIO_DBF_HEX0(0,setup,&irq_ptr,sizeof(void*));
if (!irq_ptr) {
QDIO_PRINT_ERR("kmalloc of irq_ptr failed!\n");
QDIO_PRINT_ERR("allocation of irq_ptr failed!\n");
return -ENOMEM;
}
init_MUTEX(&irq_ptr->setting_up_sema);
/* QDR must be in DMA area since CCW data address is only 32 bit */
irq_ptr->qdr=kmalloc(sizeof(struct qdr), GFP_KERNEL | GFP_DMA);
irq_ptr->qdr = (struct qdr *) __get_free_page(GFP_KERNEL | GFP_DMA);
if (!(irq_ptr->qdr)) {
free_page((unsigned long) irq_ptr);
QDIO_PRINT_ERR("kmalloc of irq_ptr->qdr failed!\n");
QDIO_PRINT_ERR("allocation of irq_ptr->qdr failed!\n");
return -ENOMEM;
}
QDIO_DBF_TEXT0(0,setup,"qdr:");
@ -3004,6 +2994,7 @@ qdio_allocate(struct qdio_initialize *init_data)
if (qdio_alloc_qs(irq_ptr,
init_data->no_input_qs,
init_data->no_output_qs)) {
QDIO_PRINT_ERR("queue allocation failed!\n");
qdio_release_irq_memory(irq_ptr);
return -ENOMEM;
}
@ -3895,9 +3886,19 @@ init_QDIO(void)
if (res)
return res;
qdio_q_cache = kmem_cache_create("qdio_q", sizeof(struct qdio_q),
256, 0, NULL);
if (!qdio_q_cache) {
qdio_release_qdio_memory();
return -ENOMEM;
}
res = qdio_register_dbf_views();
if (res)
if (res) {
kmem_cache_destroy(qdio_q_cache);
qdio_release_qdio_memory();
return res;
}
QDIO_DBF_TEXT0(0,setup,"initQDIO");
res = bus_create_file(&ccw_bus_type, &bus_attr_qdio_performance_stats);
@ -3929,6 +3930,7 @@ cleanup_QDIO(void)
qdio_release_qdio_memory();
qdio_unregister_dbf_views();
mempool_destroy(qdio_mempool_scssc);
kmem_cache_destroy(qdio_q_cache);
bus_remove_file(&ccw_bus_type, &bus_attr_qdio_performance_stats);
printk("qdio: %s: module removed\n",version);
}