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| author | Timo Alho <talho@nvidia.com> | 2017-09-07 12:31:02 +0300 |
|---|---|---|
| committer | Thierry Reding <treding@nvidia.com> | 2017-10-19 16:38:40 +0200 |
| commit | 231ca2e583be324012212d10ad913f30c2f66adb (patch) | |
| tree | 4d38e788f7460522d1f1fa76b9ce68f77339bab1 | |
| parent | 8f43ff6b2ebc27cbd6c2cd00178195b1bf39a5fc (diff) | |
| download | linux-231ca2e583be324012212d10ad913f30c2f66adb.tar.gz linux-231ca2e583be324012212d10ad913f30c2f66adb.tar.bz2 linux-231ca2e583be324012212d10ad913f30c2f66adb.zip | |
clk: tegra: Check BPMP response return code
Check return code in BPMP response message(s). The typical error case is
when a clock operation is attempted with an invalid clock identifier.
Also remove error print from call to clk_get_info() as the
implementation loops through the range of all possible identifiers, yet
the operation is expected to error out when the clock ID is unused.
Signed-off-by: Timo Alho <talho@nvidia.com>
Acked-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
| -rw-r--r-- | drivers/clk/tegra/clk-bpmp.c | 15 |
1 files changed, 10 insertions, 5 deletions
diff --git a/drivers/clk/tegra/clk-bpmp.c b/drivers/clk/tegra/clk-bpmp.c index 638ace64033b..a896692b74ec 100644 --- a/drivers/clk/tegra/clk-bpmp.c +++ b/drivers/clk/tegra/clk-bpmp.c @@ -55,6 +55,7 @@ struct tegra_bpmp_clk_message { struct { void *data; size_t size; + int ret; } rx; }; @@ -64,6 +65,7 @@ static int tegra_bpmp_clk_transfer(struct tegra_bpmp *bpmp, struct mrq_clk_request request; struct tegra_bpmp_message msg; void *req = &request; + int err; memset(&request, 0, sizeof(request)); request.cmd_and_id = (clk->cmd << 24) | clk->id; @@ -84,7 +86,13 @@ static int tegra_bpmp_clk_transfer(struct tegra_bpmp *bpmp, msg.rx.data = clk->rx.data; msg.rx.size = clk->rx.size; - return tegra_bpmp_transfer(bpmp, &msg); + err = tegra_bpmp_transfer(bpmp, &msg); + if (err < 0) + return err; + else if (msg.rx.ret < 0) + return -EINVAL; + + return 0; } static int tegra_bpmp_clk_prepare(struct clk_hw *hw) @@ -414,11 +422,8 @@ static int tegra_bpmp_probe_clocks(struct tegra_bpmp *bpmp, struct tegra_bpmp_clk_info *info = &clocks[count]; err = tegra_bpmp_clk_get_info(bpmp, id, info); - if (err < 0) { - dev_err(bpmp->dev, "failed to query clock %u: %d\n", - id, err); + if (err < 0) continue; - } if (info->num_parents >= U8_MAX) { dev_err(bpmp->dev, |