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s390/qdio: do more fine-grained allocation roll-back

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Instead of having a catch-all qdio_release_memory() helper, free the
individual allocations from the respective error path.

Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Reviewed-by: Steffen Maier <maier@linux.ibm.com>
Reviewed-by: Benjamin Block <bblock@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
This commit is contained in:
Julian Wiedmann 2020-04-02 23:22:18 +02:00 committed by Vasily Gorbik
parent 3050f022df
commit edbf3b2a87
3 changed files with 24 additions and 16 deletions
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2
drivers/s390/cio/qdio.h
View File

@ -388,7 +388,7 @@ int qdio_setup_get_ssqd(struct qdio_irq *irq_ptr,
int qdio_setup_irq(struct qdio_irq *irq_ptr, struct qdio_initialize *init_data);
void qdio_shutdown_irq(struct qdio_irq *irq);
void qdio_print_subchannel_info(struct qdio_irq *irq_ptr);
void qdio_release_memory(struct qdio_irq *irq_ptr);
void qdio_free_queues(struct qdio_irq *irq_ptr);
int qdio_setup_init(void);
void qdio_setup_exit(void);
int qdio_enable_async_operation(struct qdio_output_q *q);

33
drivers/s390/cio/qdio_main.c
View File

@ -1205,7 +1205,10 @@ int qdio_free(struct ccw_device *cdev)
cdev->private->qdio_data = NULL;
mutex_unlock(&irq_ptr->setup_mutex);
qdio_release_memory(irq_ptr);
qdio_free_queues(irq_ptr);
free_page((unsigned long) irq_ptr->qdr);
free_page(irq_ptr->chsc_page);
free_page((unsigned long) irq_ptr);
return 0;
}
EXPORT_SYMBOL_GPL(qdio_free);
@ -1221,6 +1224,7 @@ int qdio_allocate(struct ccw_device *cdev, unsigned int no_input_qs,
{
struct subchannel_id schid;
struct qdio_irq *irq_ptr;
int rc = -ENOMEM;
ccw_device_get_schid(cdev, &schid);
DBF_EVENT("qallocate:%4x", schid.sch_no);
@ -1232,12 +1236,12 @@ int qdio_allocate(struct ccw_device *cdev, unsigned int no_input_qs,
/* irq_ptr must be in GFP_DMA since it contains ccw1.cda */
irq_ptr = (void *) get_zeroed_page(GFP_KERNEL | GFP_DMA);
if (!irq_ptr)
goto out_err;
return -ENOMEM;
irq_ptr->cdev = cdev;
mutex_init(&irq_ptr->setup_mutex);
if (qdio_allocate_dbf(irq_ptr))
goto out_rel;
goto err_dbf;
DBF_DEV_EVENT(DBF_ERR, irq_ptr, "alloc niq:%1u noq:%1u", no_input_qs,
no_output_qs);
@ -1250,24 +1254,31 @@ int qdio_allocate(struct ccw_device *cdev, unsigned int no_input_qs,
*/
irq_ptr->chsc_page = get_zeroed_page(GFP_KERNEL);
if (!irq_ptr->chsc_page)
goto out_rel;
goto err_chsc;
/* qdr is used in ccw1.cda which is u32 */
irq_ptr->qdr = (struct qdr *) get_zeroed_page(GFP_KERNEL | GFP_DMA);
if (!irq_ptr->qdr)
goto out_rel;
goto err_qdr;
if (qdio_allocate_qs(irq_ptr, no_input_qs, no_output_qs))
goto out_rel;
rc = qdio_allocate_qs(irq_ptr, no_input_qs, no_output_qs);
if (rc)
goto err_queues;
INIT_LIST_HEAD(&irq_ptr->entry);
cdev->private->qdio_data = irq_ptr;
qdio_set_state(irq_ptr, QDIO_IRQ_STATE_INACTIVE);
return 0;
out_rel:
qdio_release_memory(irq_ptr);
out_err:
return -ENOMEM;
err_queues:
qdio_free_queues(irq_ptr);
free_page((unsigned long) irq_ptr->qdr);
err_qdr:
free_page(irq_ptr->chsc_page);
err_chsc:
err_dbf:
free_page((unsigned long) irq_ptr);
return rc;
}
EXPORT_SYMBOL_GPL(qdio_allocate);

5
drivers/s390/cio/qdio_setup.c
View File

@ -347,7 +347,7 @@ void qdio_setup_ssqd_info(struct qdio_irq *irq_ptr)
DBF_EVENT("3:%4x qib:%4x", irq_ptr->ssqd_desc.qdioac3, irq_ptr->qib.ac);
}
void qdio_release_memory(struct qdio_irq *irq_ptr)
void qdio_free_queues(struct qdio_irq *irq_ptr)
{
struct qdio_q *q;
int i;
@ -383,9 +383,6 @@ void qdio_release_memory(struct qdio_irq *irq_ptr)
kmem_cache_free(qdio_q_cache, q);
}
}
free_page((unsigned long) irq_ptr->qdr);
free_page(irq_ptr->chsc_page);
free_page((unsigned long) irq_ptr);
}
static void __qdio_allocate_fill_qdr(struct qdio_irq *irq_ptr,