diff options
| author | Douglas Anderson <dianders@chromium.org> | 2020-04-13 20:04:12 +0300 |
|---|---|---|
| committer | Bjorn Andersson <bjorn.andersson@linaro.org> | 2020-04-14 08:09:38 +0300 |
| commit | ff304ea34d2e2d7ef7a13aefb4e62f456cf78e99 (patch) | |
| tree | 683554bc6185eda5370a9b0c2833afafeedb0585 | |
| parent | e40b0c1628f27986dd90f94c43464df5aa8968cf (diff) | |
| download | linux-ff304ea34d2e2d7ef7a13aefb4e62f456cf78e99.tar.xz | |
soc: qcom: rpmh-rsc: tcs_is_free() can just check tcs_in_use
tcs_is_free() had two checks in it: does the software think that the
TCS is free and does the hardware think that the TCS is free. I
couldn't figure out in which case the hardware could think that a TCS
was in-use but software thought it was free. Apparently there is no
case and the extra check can be removed. This apparently has already
been done in a downstream patch.
Suggested-by: Maulik Shah <mkshah@codeaurora.org>
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Reviewed-by: Maulik Shah <mkshah@codeaurora.org>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Tested-by: Maulik Shah <mkshah@codeaurora.org>
Link: https://lore.kernel.org/r/20200413100321.v4.7.Icf2213131ea652087f100129359052c83601f8b0@changeid
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
| -rw-r--r-- | drivers/soc/qcom/rpmh-rsc.c | 4 |
1 files changed, 1 insertions, 3 deletions
diff --git a/drivers/soc/qcom/rpmh-rsc.c b/drivers/soc/qcom/rpmh-rsc.c index 78fe9344ecd3..dc4bad01c000 100644 --- a/drivers/soc/qcom/rpmh-rsc.c +++ b/drivers/soc/qcom/rpmh-rsc.c @@ -177,7 +177,6 @@ static void write_tcs_reg_sync(struct rsc_drv *drv, int reg, int tcs_id, * @tcs_id: The global ID of this TCS. * * Returns true if nobody has claimed this TCS (by setting tcs_in_use). - * If the TCS looks free, checks that the hardware agrees. * * Context: Must be called with the drv->lock held or the tcs_lock for the TCS * being tested. If only the tcs_lock is held then it is possible that @@ -189,8 +188,7 @@ static void write_tcs_reg_sync(struct rsc_drv *drv, int reg, int tcs_id, */ static bool tcs_is_free(struct rsc_drv *drv, int tcs_id) { - return !test_bit(tcs_id, drv->tcs_in_use) && - read_tcs_reg(drv, RSC_DRV_STATUS, tcs_id); + return !test_bit(tcs_id, drv->tcs_in_use); } /** |