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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>
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@ -251,6 +251,8 @@ static int vfio_platform_open(void *device_data)
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mutex_lock(&driver_lock);
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if (!vdev->refcnt) {
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const char *extra_dbg = NULL;
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ret = vfio_platform_regions_init(vdev);
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if (ret)
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goto err_reg;
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@ -259,7 +261,12 @@ static int vfio_platform_open(void *device_data)
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if (ret)
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goto err_irq;
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vfio_platform_call_reset(vdev, NULL);
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ret = vfio_platform_call_reset(vdev, &extra_dbg);
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if (ret && vdev->reset_required) {
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dev_warn(vdev->device, "reset driver is required and reset call failed in open (%d) %s\n",
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ret, extra_dbg ? extra_dbg : "");
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goto err_rst;
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}
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}
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vdev->refcnt++;
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@ -267,6 +274,8 @@ static int vfio_platform_open(void *device_data)
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mutex_unlock(&driver_lock);
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return 0;
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err_rst:
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vfio_platform_irq_cleanup(vdev);
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err_irq:
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vfio_platform_regions_cleanup(vdev);
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err_reg:
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