From: Markus Elfring <[email protected]>
Date: Wed, 10 May 2017 19:29:17 +0200
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The script “checkpatch.pl” pointed information out like the following.

Comparison to NULL could be written …

Thus fix the affected source code places.

Signed-off-by: Markus Elfring <[email protected]>
---
 drivers/s390/block/dasd_eckd.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/s390/block/dasd_eckd.c b/drivers/s390/block/dasd_eckd.c
index e78601d97a67..d02f3bbbd552 100644
--- a/drivers/s390/block/dasd_eckd.c
+++ b/drivers/s390/block/dasd_eckd.c
@@ -1080,7 +1080,7 @@ static int dasd_eckd_read_conf(struct dasd_device *device)
                                        "error %d", rc);
                        return rc;
                }
-               if (conf_data == NULL) {
+               if (!conf_data) {
                        DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
                                        "No configuration data "
                                        "retrieved");
@@ -2049,7 +2049,7 @@ static int dasd_eckd_end_analysis(struct dasd_block 
*block)
                                 "Track 0 has no records following the VTOC\n");
        }
 
-       if (count_area != NULL && count_area->kl == 0) {
+       if (count_area && count_area->kl == 0) {
                /* we found notthing violating our disk layout */
                if (dasd_check_blocksize(count_area->dl) == 0)
                        block->bp_block = count_area->dl;
@@ -2649,10 +2649,10 @@ static int dasd_eckd_format_process_data(struct 
dasd_device *base,
        old_start = fdata->start_unit;
        old_stop = fdata->stop_unit;
 
-       if (!tpm && fmt_buffer != NULL) {
+       if (!tpm && fmt_buffer) {
                /* Command Mode / Format Check */
                format_step = 1;
-       } else if (tpm && fmt_buffer != NULL) {
+       } else if (tpm && fmt_buffer) {
                /* Transport Mode / Format Check */
                format_step = DASD_CQR_MAX_CCW / rpt;
        } else {
@@ -4681,7 +4681,7 @@ static void dasd_eckd_dump_sense_ccw(struct dasd_device 
*device,
        int len, sl, sct;
 
        page = (char *) get_zeroed_page(GFP_ATOMIC);
-       if (page == NULL) {
+       if (!page) {
                DBF_DEV_EVENT(DBF_WARNING, device, "%s",
                              "No memory to dump sense data\n");
                return;
@@ -4785,7 +4785,7 @@ static void dasd_eckd_dump_sense_tcw(struct dasd_device 
*device,
        u8 *sense, *rcq;
 
        page = (char *) get_zeroed_page(GFP_ATOMIC);
-       if (page == NULL) {
+       if (!page) {
                DBF_DEV_EVENT(DBF_WARNING, device, " %s",
                            "No memory to dump sense data");
                return;
-- 
2.12.3

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