[PATCH 4/5] ISDN-CAPI: Adjust checks for null pointers in four functions

[SF Markus Elfring]

From: Markus Elfring <elfr...@users.sourceforge.net>
Date: Sun, 25 Sep 2016 12:26:38 +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/isdn/capi/capidrv.c | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/drivers/isdn/capi/capidrv.c b/drivers/isdn/capi/capidrv.c
index bd614e3..83f756d 100644
--- a/drivers/isdn/capi/capidrv.c
+++ b/drivers/isdn/capi/capidrv.c
@@ -334,8 +334,7 @@ static capidrv_plci *new_plci(capidrv_contr *card, int chan)
        capidrv_plci *plcip;
 
        plcip = kzalloc(sizeof(capidrv_plci), GFP_ATOMIC);
-
-       if (plcip == NULL)
+       if (!plcip)
                return NULL;
 
        plcip->state = ST_PLCI_NONE;
@@ -403,8 +402,7 @@ static inline capidrv_ncci *new_ncci(capidrv_contr *card,
        capidrv_ncci *nccip;
 
        nccip = kzalloc(sizeof(capidrv_ncci), GFP_ATOMIC);
-
-       if (nccip == NULL)
+       if (!nccip)
                return NULL;
 
        nccip->ncci = ncci;
@@ -757,7 +755,7 @@ static inline int new_bchan(capidrv_contr *card)
 {
        int i;
        for (i = 0; i < card->nbchan; i++) {
-               if (card->bchans[i].plcip == NULL) {
+               if (!card->bchans[i].plcip) {
                        card->bchans[i].disconnecting = 0;
                        return i;
                }
@@ -2192,7 +2190,7 @@ static void enable_dchannel_trace(capidrv_contr *card)
                       card->name, errcode);
                return;
        }
-       if (strstr(manufacturer, "AVM") == NULL) {
+       if (!strstr(manufacturer, "AVM")) {
                printk(KERN_ERR "%s: not from AVM, no d-channel trace possible 
(%s)\n",
                       card->name, manufacturer);
                return;
-- 
2.10.0