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authorSinan Kaya <okaya@codeaurora.org>2016-07-19 15:01:48 +0200
committerAlex Williamson <alex.williamson@redhat.com>2016-07-19 18:54:45 +0200
commite99442323f33470677deeed35619313b05837f35 (patch)
tree29d35dfccf9a93efdc42ce1c45a0366a23869430 /drivers/vfio
parentvfio, platform: make reset driver a requirement by default (diff)
downloadlinux-e99442323f33470677deeed35619313b05837f35.tar.xz
linux-e99442323f33470677deeed35619313b05837f35.zip
vfio: platform: check reset call return code during open
Open call is ignoring the return code from reset call and can potentially continue even though reset call failed. If reset_required module parameter is set, this patch is going to validate the return code and will abort open if reset fails. Signed-off-by: Sinan Kaya <okaya@codeaurora.org> Reviewed-by: Baptiste Reynal <b.reynal@virtualopensystems.com> Reviewed-by: Eric Auger <eric.auger@redhat.com> Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Diffstat (limited to 'drivers/vfio')
-rw-r--r--drivers/vfio/platform/vfio_platform_common.c11
1 files changed, 10 insertions, 1 deletions
diff --git a/drivers/vfio/platform/vfio_platform_common.c b/drivers/vfio/platform/vfio_platform_common.c
index d8755d2c6053..389d6515bc09 100644
--- a/drivers/vfio/platform/vfio_platform_common.c
+++ b/drivers/vfio/platform/vfio_platform_common.c
@@ -251,6 +251,8 @@ static int vfio_platform_open(void *device_data)
mutex_lock(&driver_lock);
if (!vdev->refcnt) {
+ const char *extra_dbg = NULL;
+
ret = vfio_platform_regions_init(vdev);
if (ret)
goto err_reg;
@@ -259,7 +261,12 @@ static int vfio_platform_open(void *device_data)
if (ret)
goto err_irq;
- vfio_platform_call_reset(vdev, NULL);
+ ret = vfio_platform_call_reset(vdev, &extra_dbg);
+ if (ret && vdev->reset_required) {
+ dev_warn(vdev->device, "reset driver is required and reset call failed in open (%d) %s\n",
+ ret, extra_dbg ? extra_dbg : "");
+ goto err_rst;
+ }
}
vdev->refcnt++;
@@ -267,6 +274,8 @@ static int vfio_platform_open(void *device_data)
mutex_unlock(&driver_lock);
return 0;
+err_rst:
+ vfio_platform_irq_cleanup(vdev);
err_irq:
vfio_platform_regions_cleanup(vdev);
err_reg: