diff options
| author | Ashwini Ghuge <aghuge@nvidia.com> | 2012-06-20 14:04:49 +0530 |
|---|---|---|
| committer | Simone Willett <swillett@nvidia.com> | 2012-06-20 14:04:06 -0700 |
| commit | a85a9db8f4a108c0d07680127e5fbf272095f0ac (patch) | |
| tree | 506800d22e8eee73dd5e7be8d09486f196bb6f73 | |
| parent | ce93880e4c6cabc9978a3f888002ca08cb00aad1 (diff) | |
spi: tegra: check tx queue before start transfer
Check for valid entry on the message queue before
reading the transfer list from queue. If queue is
empty then do not start transfer.
Change-Id: If51a816780ab76700a7a1d7d8a025a3544590ad1
Signed-off-by: Ashwini Ghuge <aghuge@nvidia.com>
Reviewed-on: http://git-master/r/109469
Reviewed-by: Simone Willett <swillett@nvidia.com>
Tested-by: Simone Willett <swillett@nvidia.com>
| -rw-r--r-- | drivers/spi/spi-tegra.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/spi/spi-tegra.c b/drivers/spi/spi-tegra.c index 7b3382e952ff..c0de42bf4299 100644 --- a/drivers/spi/spi-tegra.c +++ b/drivers/spi/spi-tegra.c @@ -967,6 +967,11 @@ static void spi_tegra_curr_transfer_complete(struct spi_tegra_data *tspi, udelay(tspi->cur->delay_usecs); } + if (list_empty(&tspi->queue)) { + dev_err(&tspi->pdev->dev, "Handling empty list\n"); + return; + } + m = list_first_entry(&tspi->queue, struct spi_message, queue); if (err) m->status = -EIO; |