diff options
| author | Johnny Qiu <joqiu@nvidia.com> | 2012-06-18 15:11:23 +0800 |
|---|---|---|
| committer | Simone Willett <swillett@nvidia.com> | 2012-06-20 13:40:53 -0700 |
| commit | b426ea53fbdd902e85eacb865d1b2912b49260fe (patch) | |
| tree | c7d26c72bb9c68337f9d10c90d93b515a7b5dc19 /drivers | |
| parent | 03b3d64a3fef9419e1b6eec35ff9add0785dd045 (diff) | |
spi: tegra: do not start transfer if runtime pm fails to resume
Bug 995706
During device shutdown/rebooting, runtime PM is disabled. SPI bus
driver will fail to call tegra_spi_runtime_resume() to resume the
clock needed by tranferring. In this case, do not start transferring.
Change-Id: I42cc0763f55b6c90df00fbad68794939e903199a
Signed-off-by: Johnny Qiu <joqiu@nvidia.com>
Reviewed-on: http://git-master/r/109458
Reviewed-by: Automatic_Commit_Validation_User
GVS: Gerrit_Virtual_Submit
Reviewed-by: Laxman Dewangan <ldewangan@nvidia.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/spi/spi-tegra.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/spi/spi-tegra.c b/drivers/spi/spi-tegra.c index d4b9c3344eee..33e2004101b7 100644 --- a/drivers/spi/spi-tegra.c +++ b/drivers/spi/spi-tegra.c @@ -736,7 +736,12 @@ static void spi_tegra_start_transfer(struct spi_device *spi, command2 = tspi->def_command2_reg; if (is_first_of_msg) { - pm_runtime_get_sync(&tspi->pdev->dev); + if ((ret = pm_runtime_get_sync(&tspi->pdev->dev)) < 0) { + dev_err(&tspi->pdev->dev, + "%s: pm_runtime_get_sync() returns %d\n", + __func__, ret); + return; + } spi_tegra_clear_status(tspi); |