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-rw-r--r--drivers/spi/spi-s3c64xx.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/spi/spi-s3c64xx.c b/drivers/spi/spi-s3c64xx.c
index f6048345022d..87b7203f9b1f 100644
--- a/drivers/spi/spi-s3c64xx.c
+++ b/drivers/spi/spi-s3c64xx.c
@@ -1189,6 +1189,9 @@ static int s3c64xx_spi_probe(struct platform_device *pdev)
"Failed to get alias id\n");
sdd->port_id = ret;
} else {
+ if (pdev->id < 0)
+ return dev_err_probe(&pdev->dev, -EINVAL,
+ "Negative platform ID is not allowed\n");
sdd->port_id = pdev->id;
}