[PATCH 7/7] iio: Adjust checks for null pointers in six functions

[SF Markus Elfring]

From: Markus Elfring <elfr...@users.sourceforge.net>
Date: Sat, 24 Sep 2016 08:00:07 +0200
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The script "checkpatch.pl" can point information out like the following.

Comparison to NULL could be written !…

Thus fix the affected source code places.

Signed-off-by: Markus Elfring <elfr...@users.sourceforge.net>
---
 drivers/iio/industrialio-buffer.c | 18 +++++++++---------
 1 file changed, 9 insertions(+), 9 deletions(-)

diff --git a/drivers/iio/industrialio-buffer.c 
b/drivers/iio/industrialio-buffer.c
index 57e201a..6893639 100644
--- a/drivers/iio/industrialio-buffer.c
+++ b/drivers/iio/industrialio-buffer.c
@@ -310,7 +310,7 @@ static int iio_scan_mask_set(struct iio_dev *indio_dev,
        trialmask = kmalloc_array(BITS_TO_LONGS(indio_dev->masklength),
                                  sizeof(*trialmask),
                                  GFP_KERNEL);
-       if (trialmask == NULL)
+       if (!trialmask)
                return -ENOMEM;
        if (!indio_dev->masklength) {
                WARN(1, "Trying to set scanmask prior to registering buffer\n");
@@ -711,7 +711,7 @@ static int iio_verify_update(struct iio_dev *indio_dev,
        /* What scan mask do we actually have? */
        compound_mask = kcalloc(BITS_TO_LONGS(indio_dev->masklength),
                                sizeof(long), GFP_KERNEL);
-       if (compound_mask == NULL)
+       if (!compound_mask)
                return -ENOMEM;
 
        scan_timestamp = false;
@@ -736,7 +736,7 @@ static int iio_verify_update(struct iio_dev *indio_dev,
                                    compound_mask,
                                    strict_scanmask);
                kfree(compound_mask);
-               if (scan_mask == NULL)
+               if (!scan_mask)
                        return -EINVAL;
        } else {
            scan_mask = compound_mask;
@@ -940,7 +940,7 @@ int iio_update_buffers(struct iio_dev *indio_dev,
                goto out_unlock;
        }
 
-       if (indio_dev->info == NULL) {
+       if (!indio_dev->info) {
                ret = -ENODEV;
                goto out_unlock;
        }
@@ -1130,11 +1130,11 @@ int iio_buffer_alloc_sysfs_and_mask(struct iio_dev 
*indio_dev)
                                indio_dev->scan_index_timestamp =
                                        channels[i].scan_index;
                }
-               if (indio_dev->masklength && buffer->scan_mask == NULL) {
+               if (indio_dev->masklength && !buffer->scan_mask) {
                        buffer->scan_mask = 
kcalloc(BITS_TO_LONGS(indio_dev->masklength),
                                                    sizeof(*buffer->scan_mask),
                                                    GFP_KERNEL);
-                       if (buffer->scan_mask == NULL) {
+                       if (!buffer->scan_mask) {
                                ret = -ENOMEM;
                                goto error_cleanup_dynamic;
                        }
@@ -1146,7 +1146,7 @@ int iio_buffer_alloc_sysfs_and_mask(struct iio_dev 
*indio_dev)
        buffer->scan_el_group.attrs = kcalloc(attrcount + 1,
                                              
sizeof(buffer->scan_el_group.attrs[0]),
                                              GFP_KERNEL);
-       if (buffer->scan_el_group.attrs == NULL) {
+       if (!buffer->scan_el_group.attrs) {
                ret = -ENOMEM;
                goto error_free_scan_mask;
        }
@@ -1291,7 +1291,7 @@ static int iio_buffer_add_demux(struct iio_buffer *buffer,
                (*p)->length += length;
        } else {
                *p = kmalloc(sizeof(**p), GFP_KERNEL);
-               if (*p == NULL)
+               if (!*p)
                        return -ENOMEM;
                (*p)->from = in_loc;
                (*p)->to = out_loc;
@@ -1356,7 +1356,7 @@ static int iio_buffer_update_demux(struct iio_dev 
*indio_dev,
                in_loc += length;
        }
        buffer->demux_bounce = kzalloc(out_loc, GFP_KERNEL);
-       if (buffer->demux_bounce == NULL) {
+       if (!buffer->demux_bounce) {
                ret = -ENOMEM;
                goto error_clear_mux_table;
        }
-- 
2.10.0