4.16-stable review patch. If anyone has any objections, please let me know.
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From: Julian Wiedmann jwi@linux.ibm.com
commit 2e68adcd2fb21b7188ba449f0fab3bee2910e500 upstream.
Calling qdio_release_memory() on error is just plain wrong. It frees the main qdio_irq struct, when following code still uses it.
Also, no other error path in qdio_establish() does this. So trust callers to clean up via qdio_free() if some step of the QDIO initialization fails.
Fixes: 779e6e1c724d ("[S390] qdio: new qdio driver.") Cc: stable@vger.kernel.org #v2.6.27+ Signed-off-by: Julian Wiedmann jwi@linux.ibm.com Signed-off-by: Martin Schwidefsky schwidefsky@de.ibm.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/s390/cio/qdio_setup.c | 10 ++-------- 1 file changed, 2 insertions(+), 8 deletions(-)
--- a/drivers/s390/cio/qdio_setup.c +++ b/drivers/s390/cio/qdio_setup.c @@ -456,7 +456,6 @@ int qdio_setup_irq(struct qdio_initializ { struct ciw *ciw; struct qdio_irq *irq_ptr = init_data->cdev->private->qdio_data; - int rc;
memset(&irq_ptr->qib, 0, sizeof(irq_ptr->qib)); memset(&irq_ptr->siga_flag, 0, sizeof(irq_ptr->siga_flag)); @@ -493,16 +492,14 @@ int qdio_setup_irq(struct qdio_initializ ciw = ccw_device_get_ciw(init_data->cdev, CIW_TYPE_EQUEUE); if (!ciw) { DBF_ERROR("%4x NO EQ", irq_ptr->schid.sch_no); - rc = -EINVAL; - goto out_err; + return -EINVAL; } irq_ptr->equeue = *ciw;
ciw = ccw_device_get_ciw(init_data->cdev, CIW_TYPE_AQUEUE); if (!ciw) { DBF_ERROR("%4x NO AQ", irq_ptr->schid.sch_no); - rc = -EINVAL; - goto out_err; + return -EINVAL; } irq_ptr->aqueue = *ciw;
@@ -510,9 +507,6 @@ int qdio_setup_irq(struct qdio_initializ irq_ptr->orig_handler = init_data->cdev->handler; init_data->cdev->handler = qdio_int_handler; return 0; -out_err: - qdio_release_memory(irq_ptr); - return rc; }
void qdio_print_subchannel_info(struct qdio_irq *irq_ptr,