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path: root/recipes/linux/openzaurus-pxa27x-2.4.20-rmk2-embedix20050602/P03-C3000-SIGSTOP_FIX_041207.patch
blob: 332f52f939f07cc4b8d2edee1281cc063c30626b (plain)
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diff -Nur c3000_pre/linux/arch/arm/config.in c3000_work/linux/arch/arm/config.in
--- c3000_pre/linux/arch/arm/config.in	2004-12-05 22:17:18.000000000 +0900
+++ c3000_work/linux/arch/arm/config.in	2004-12-06 01:13:03.000000000 +0900
@@ -481,6 +481,7 @@
    if [ "$CONFIG_SL_CCCR_CHANGE" = "y" ]; then
       bool 'Core voltage change enable (EXPERIMENTAL)' CONFIG_CHANGE_CORE_VOLT
    fi
+      bool 'Fix send SIGSTOP to all tasks at suspend (EXPERIMENTAL)' CONFIG_SL_SIGSTOP_FIX
    if [ "$CONFIG_ARCH_SHARP_SL" = "y" ]; then
       define_bool CONFIG_BATT y
    fi
diff -Nur c3000_pre/linux/arch/arm/mach-pxa/sharpsl_apm.c c3000_work/linux/arch/arm/mach-pxa/sharpsl_apm.c
--- c3000_pre/linux/arch/arm/mach-pxa/sharpsl_apm.c	2004-12-05 22:17:18.000000000 +0900
+++ c3000_work/linux/arch/arm/mach-pxa/sharpsl_apm.c	2004-12-06 23:48:35.000000000 +0900
@@ -75,6 +75,11 @@
 #include <asm/system.h>
 #include <asm/hardware.h>
 
+extern int errno;
+// unistd.h is included for the configuration ioctl stuff
+#define __KERNEL_SYSCALLS__ 1
+#include <asm/unistd.h>
+
 #ifdef CONFIG_ARCH_SHARP_SL
 #include <asm/irq.h>
 #include <asm/arch/irqs.h>
@@ -363,6 +368,8 @@
 };
 #define ERROR_COUNT	(sizeof(error_table)/sizeof(lookup_t))
 
+#define APP_NAME_LIST "/etc/suspend.lst"
+
 /*
  * Function 
  */
@@ -650,14 +657,81 @@
 	struct task_struct* p = NULL;
 	struct task_struct* tsk = current;
 
+#if defined(CONFIG_SL_SIGSTOP_FIX)
+	int fd,x;
+	mm_segment_t old_fs = get_fs ();
+	char line_buffer[256];
+
 	if (! spin_trylock(&lock))
 		return;
+
+	// Try opening the send sig application name list
+
+	set_fs(KERNEL_DS);
+	fd = open(APP_NAME_LIST, O_RDONLY, 0);
+	set_fs(old_fs);
  
 	/* send signal to all procs except for kernel-threads */
 	read_lock(&tasklist_lock);
+
+	if(fd  < 0){
+		for_each_task(p) {
+			struct siginfo si;
+
+			if (p->pid == 1 || p->pid == tsk->pid || is_kernel_thread(p))
+				continue;
+			if (!strcmp(p->comm,"cardmgr")) {		//Send sig to cardmgr
+				si.si_signo = signo;
+				si.si_errno = 0;
+				si.si_code = SI_KERNEL;
+				si.si_pid = tsk->pid;
+				si.si_uid = tsk->uid;
+				send_sig_info(signo, &si, p);
+			}
+		}
+
+	}else {
+        for(;;){
+			memset(line_buffer, '\0', 256);
+			set_fs(KERNEL_DS);
+			for (x = 0; x < 256; x++) {
+				if (!read(fd, &line_buffer[x], 1))
+					goto sig_send_done;
+				if (line_buffer[x] == '\n' || line_buffer[x] == '\r')
+					break;
+			}
+			set_fs(old_fs);
+
+			for_each_task(p) {
+				struct siginfo si;
+
+				if (p->pid == 1 || p->pid == tsk->pid || is_kernel_thread(p))
+					continue;
+				if (!strncmp(p->comm,line_buffer,strlen(p->comm))) {		//Send sig to cardmgr
+//					printk ("Send SIG to application\n");
+					si.si_signo = signo;
+					si.si_errno = 0;
+					si.si_code = SI_KERNEL;
+					si.si_pid = tsk->pid;
+					si.si_uid = tsk->uid;
+					send_sig_info(signo, &si, p);
+				}
+			}
+		}
+	sig_send_done:
+
+        close(fd);
+
+	}
+#else
+	if (! spin_trylock(&lock))
+		return;
+
+	/* send signal to all procs except for kernel-threads */
+	read_lock(&tasklist_lock);
 	for_each_task(p) {
 		struct siginfo si;
-
+ 
 		if (p->pid == 1 || p->pid == tsk->pid || is_kernel_thread(p))
 			continue;
 
@@ -667,7 +741,8 @@
 		si.si_pid = tsk->pid;
 		si.si_uid = tsk->uid;
 		send_sig_info(signo, &si, p);
-	}
+	} 
+#endif
 	read_unlock(&tasklist_lock);
 
 	if (signo == SIGSTOP) {
@@ -679,6 +754,58 @@
 		schedule();
 		set_current_state(state);
 
+#if defined(CONFIG_SL_SIGSTOP_FIX)
+		set_fs(KERNEL_DS);
+		fd = open(APP_NAME_LIST, O_RDONLY, 0);
+		set_fs(old_fs);
+
+		read_lock(&tasklist_lock);
+		if(fd  < 0){
+			for_each_task(p) {
+				if (p->pid == 1 || p->pid == tsk->pid || is_kernel_thread(p))
+					continue;
+				if (!strcmp(p->comm,"cardmgr")) {
+//				    printk ("Check application stopped\n");
+	
+				    if (p->state != TASK_STOPPED) {
+					read_unlock(&tasklist_lock);
+					goto retry;
+				    }
+				}
+ 			}
+		}else {
+
+	        for(;;){
+				memset(line_buffer, '\0', 256);
+				old_fs = get_fs();
+				set_fs(KERNEL_DS);
+				for (x = 0; x < 256; x++) {
+					if (!read(fd, &line_buffer[x], 1))
+						goto sig_stop_done;
+					if (line_buffer[x] == '\n' || line_buffer[x] == '\r')
+						break;
+				}
+				set_fs(old_fs);
+
+				for_each_task(p) {
+					if (p->pid == 1 || p->pid == tsk->pid || is_kernel_thread(p))
+						continue;
+					if (!strncmp(p->comm,line_buffer,strlen(p->comm))) {
+		
+					    if (p->state != TASK_STOPPED) {
+						read_unlock(&tasklist_lock);
+						goto retry;
+					    }
+					}
+				}
+			}
+		sig_stop_done:
+                close(fd);
+ 		}
+
+ 		read_unlock(&tasklist_lock);
+	}
+#else
 		read_lock(&tasklist_lock);
 		for_each_task(p) {
 			if (p->pid == 1 || p->pid == tsk->pid || is_kernel_thread(p))
@@ -691,6 +818,7 @@
 		}
 		read_unlock(&tasklist_lock);
 	}
+#endif
 
 	spin_unlock(&lock);
 }