Staging: rtxxx0: PID checking fixes

* rt3070:
  - add missing pid_nr() invocations

* rt{28,30}70:
  - do not treat PID 0 as valid
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/rt2860/rt_linux.h

@@ -163,7 +163,7 @@ typedef	struct pid *	THREAD_PID;
 #define	THREAD_PID_INIT_VALUE	NULL
 #define	GET_PID(_v)	find_get_pid(_v)
 #define	GET_PID_NUMBER(_v)	pid_nr(_v)
-#define CHECK_PID_LEGALITY(_pid)	if (pid_nr(_pid) >= 0)
+#define CHECK_PID_LEGALITY(_pid)	if (pid_nr(_pid) > 0)
 #define KILL_THREAD_PID(_A, _B, _C)	kill_pid(_A, _B, _C)
 #endif
 

drivers/staging/rt2870/2870_main_dev.c

@@ -1063,7 +1063,7 @@ VOID RT28xxThreadTerminate(
 	}
 #endif
 #ifdef RT30xx
-	if (pObj->MLMEThr_pid)
+	if (pid_nr(pObj->MLMEThr_pid) > 0)
 	{
 		printk("Terminate the MLMEThr_pid=%d!\n", pid_nr(pObj->MLMEThr_pid));
 		mb();
@@ -1084,7 +1084,7 @@ VOID RT28xxThreadTerminate(
 		}
 	}
 
-	if (pObj->RTUSBCmdThr_pid >= 0)
+	if (pid_nr(pObj->RTUSBCmdThr_pid) > 0)
 	{
 		printk("Terminate the RTUSBCmdThr_pid=%d!\n", pid_nr(pObj->RTUSBCmdThr_pid));
 		mb();
@@ -1106,7 +1106,7 @@ VOID RT28xxThreadTerminate(
 			pObj->RTUSBCmdThr_pid = NULL;
 		}
 	}
-	if (pObj->TimerQThr_pid >= 0)
+	if (pid_nr(pObj->TimerQThr_pid) > 0)
 	{
 		POS_COOKIE pObj = (POS_COOKIE)pAd->OS_Cookie;
 		printk("Terminate the TimerQThr_pid=%d!\n", pid_nr(pObj->TimerQThr_pid));

drivers/staging/rt2870/rt2870.h

@@ -460,14 +460,14 @@ VOID RTUSBBulkRxComplete(purbb_t pUrb, struct pt_regs *pt_regs);
 #define RTUSBMlmeUp(pAd)	        \
 {								    \
 	POS_COOKIE pObj = (POS_COOKIE) pAd->OS_Cookie;	\
-	if(pObj->MLMEThr_pid>0)		    \
+	if (pid_nr(pObj->MLMEThr_pid) > 0) \
         up(&(pAd->mlme_semaphore)); \
 }
 
 #define RTUSBCMDUp(pAd)	                \
 {									    \
 	POS_COOKIE pObj = (POS_COOKIE) pAd->OS_Cookie;	\
-	if(pObj->RTUSBCmdThr_pid>0)		    \
+	if (pid_nr(pObj->RTUSBCmdThr_pid) > 0) \
 	    up(&(pAd->RTUSBCmd_semaphore)); \
 }
 #endif