On Tue, Mar 17, 2015 at 3:30 PM, Pantelis Antoniou
<pantelis.antoniou@xxxxxxxxxxxx> wrote:
> During the course of the overlay selftests some of them remain
> applied. While this does not pose a real problem, make sure you track
> them and destroy them at the end of the test.
This is going to need to be rebased on my tree as there has been some
selftest->unitest renaming.
Rob
>
> Signed-off-by: Pantelis Antoniou <pantelis.antoniou@xxxxxxxxxxxx>
> ---
> drivers/of/unittest.c | 62 +++++++++++++++++++++++++++++++++++++++++++++++++++
> 1 file changed, 62 insertions(+)
>
> diff --git a/drivers/of/unittest.c b/drivers/of/unittest.c
> index 4e60682..c711534 100644
> --- a/drivers/of/unittest.c
> +++ b/drivers/of/unittest.c
> @@ -23,6 +23,8 @@
> #include <linux/i2c.h>
> #include <linux/i2c-mux.h>
>
> +#include <linux/bitops.h>
> +
> #include "of_private.h"
>
> static struct selftest_results {
> @@ -1115,6 +1117,59 @@ static const char *overlay_path(int nr)
>
> static const char *bus_path = "/testcase-data/overlay-node/test-bus";
>
> +/* it is guaranteed that overlay ids are assigned in sequence */
> +#define MAX_SELFTEST_OVERLAYS 256
> +static unsigned long overlay_id_bits[BITS_TO_LONGS(MAX_SELFTEST_OVERLAYS)];
> +static int overlay_first_id = -1;
> +
> +static void of_selftest_track_overlay(int id)
> +{
> + if (overlay_first_id < 0)
> + overlay_first_id = id;
> + id -= overlay_first_id;
> +
> + /* we shouldn't need that many */
> + BUG_ON(id >= MAX_SELFTEST_OVERLAYS);
> + overlay_id_bits[BIT_WORD(id)] |= BIT_MASK(id);
> +}
> +
> +static void of_selftest_untrack_overlay(int id)
> +{
> + if (overlay_first_id < 0)
> + return;
> + id -= overlay_first_id;
> + BUG_ON(id >= MAX_SELFTEST_OVERLAYS);
> + overlay_id_bits[BIT_WORD(id)] &= ~BIT_MASK(id);
> +}
> +
> +static void of_selftest_destroy_tracked_overlays(void)
> +{
> + int id, ret, defers;
> +
> + if (overlay_first_id < 0)
> + return;
> +
> + /* try until no defers */
> + do {
> + defers = 0;
> + /* remove in reverse order */
> + for (id = MAX_SELFTEST_OVERLAYS - 1; id >= 0; id--) {
> + if (!(overlay_id_bits[BIT_WORD(id)] & BIT_MASK(id)))
> + continue;
> +
> + ret = of_overlay_destroy(id + overlay_first_id);
> + if (ret != 0) {
> + defers++;
> + pr_warn("%s: overlay destroy failed for #%d\n",
> + __func__, id + overlay_first_id);
> + continue;
> + }
> +
> + overlay_id_bits[BIT_WORD(id)] &= ~BIT_MASK(id);
> + }
> + } while (defers > 0);
> +}
> +
> static int of_selftest_apply_overlay(int selftest_nr, int overlay_nr,
> int *overlay_id)
> {
> @@ -1136,6 +1191,7 @@ static int of_selftest_apply_overlay(int selftest_nr, int overlay_nr,
> goto out;
> }
> id = ret;
> + of_selftest_track_overlay(id);
>
> ret = 0;
>
> @@ -1349,6 +1405,7 @@ static void of_selftest_overlay_6(void)
> return;
> }
> ov_id[i] = ret;
> + of_selftest_track_overlay(ov_id[i]);
> }
>
> for (i = 0; i < 2; i++) {
> @@ -1373,6 +1430,7 @@ static void of_selftest_overlay_6(void)
> PDEV_OVERLAY));
> return;
> }
> + of_selftest_untrack_overlay(ov_id[i]);
> }
>
> for (i = 0; i < 2; i++) {
> @@ -1417,6 +1475,7 @@ static void of_selftest_overlay_8(void)
> return;
> }
> ov_id[i] = ret;
> + of_selftest_track_overlay(ov_id[i]);
> }
>
> /* now try to remove first overlay (it should fail) */
> @@ -1439,6 +1498,7 @@ static void of_selftest_overlay_8(void)
> PDEV_OVERLAY));
> return;
> }
> + of_selftest_untrack_overlay(ov_id[i]);
> }
>
> selftest(1, "overlay test %d passed\n", 8);
> @@ -1861,6 +1921,8 @@ static void __init of_selftest_overlay(void)
> of_selftest_overlay_i2c_cleanup();
> #endif
>
> + of_selftest_destroy_tracked_overlays();
> +
> out:
> of_node_put(bus_np);
> }
> --
> 1.7.12
>
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