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soc/tegra: bpmp: Check BPMP response return code 

Add checks for the return code in BPMP response messages.

Signed-off-by: Timo Alho <talho@nvidia.com>
Acked-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
This commit is contained in:
Timo Alho 2017-09-07 12:31:04 +03:00 committed by Thierry Reding
parent d5d91f3086
commit 775dba87f8
1 changed files with 13 additions and 2 deletions
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15
drivers/soc/tegra/powergate-bpmp.c
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@ -42,6 +42,7 @@ static int tegra_bpmp_powergate_set_state(struct tegra_bpmp *bpmp,
{
struct mrq_pg_request request;
struct tegra_bpmp_message msg;
int err;
memset(&request, 0, sizeof(request));
request.cmd = CMD_PG_SET_STATE;
@ -53,7 +54,13 @@ static int tegra_bpmp_powergate_set_state(struct tegra_bpmp *bpmp,
msg.tx.data = &request;
msg.tx.size = sizeof(request);
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_powergate_get_state(struct tegra_bpmp *bpmp,
@ -80,6 +87,8 @@ static int tegra_bpmp_powergate_get_state(struct tegra_bpmp *bpmp,
err = tegra_bpmp_transfer(bpmp, &msg);
if (err < 0)
return PG_STATE_OFF;
else if (msg.rx.ret < 0)
return -EINVAL;
return response.get_state.state;
}
@ -106,6 +115,8 @@ static int tegra_bpmp_powergate_get_max_id(struct tegra_bpmp *bpmp)
err = tegra_bpmp_transfer(bpmp, &msg);
if (err < 0)
return err;
else if (msg.rx.ret < 0)
return -EINVAL;
return response.get_max_id.max_id;
}
@ -132,7 +143,7 @@ static char *tegra_bpmp_powergate_get_name(struct tegra_bpmp *bpmp,
msg.rx.size = sizeof(response);
err = tegra_bpmp_transfer(bpmp, &msg);
if (err < 0)
if (err < 0 || msg.rx.ret < 0)
return NULL;
return kstrdup(response.get_name.name, GFP_KERNEL);