spi: spidev: remove debug messages that access spidev->spi without locking

The two debug messages in spidev_open() dereference spidev->spi without
taking the lock and without checking if it's not null. This can lead to
a crash. Drop the messages as they're not needed - the user-space will
get informed about ENOMEM with the syscall return value.

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Link: https://lore.kernel.org/r/20230106100719.196243-2-brgl@bgdev.pl
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/drivers/spi/spidev.c b/drivers/spi/spidev.c
index 42aaaca672654a1f1c4989d383e448077661ce3c..1935ca61344706a60f9c497d8d2c4052414fe12d 100644 (file)
--- a/drivers/spi/spidev.c
+++ b/drivers/spi/spidev.c
@@ -603,7 +603,6 @@ static int spidev_open(struct inode *inode, struct file *filp)
        if (!spidev->tx_buffer) {
                spidev->tx_buffer = kmalloc(bufsiz, GFP_KERNEL);
                if (!spidev->tx_buffer) {
-                       dev_dbg(&spidev->spi->dev, "open/ENOMEM\n");
                        status = -ENOMEM;
                        goto err_find_dev;
                }
@@ -612,7 +611,6 @@ static int spidev_open(struct inode *inode, struct file *filp)
        if (!spidev->rx_buffer) {
                spidev->rx_buffer = kmalloc(bufsiz, GFP_KERNEL);
                if (!spidev->rx_buffer) {
-                       dev_dbg(&spidev->spi->dev, "open/ENOMEM\n");
                        status = -ENOMEM;
                        goto err_alloc_rx_buf;
                }