USB: usblcd doesn't limit memory consumption during write

[linux-2.6-omap-h63xx.git] / drivers / char / viocons.c

diff --git a/drivers/char/viocons.c b/drivers/char/viocons.c
index 766f7864c6c6b1d8896453454608b7b9613b28e6..8de6b95aeb844cd03468d86f8643d2f65ed18acf 100644 (file)
--- a/drivers/char/viocons.c
+++ b/drivers/char/viocons.c
@@ -42,8 +42,8 @@
 #include <linux/tty_flip.h>
 #include <linux/sysrq.h>
 
+#include <asm/firmware.h>
 #include <asm/iseries/vio.h>
-
 #include <asm/iseries/hv_lp_event.h>
 #include <asm/iseries/hv_call_event.h>
 #include <asm/iseries/hv_lp_config.h>
@@ -62,39 +62,7 @@
 static DEFINE_SPINLOCK(consolelock);
 static DEFINE_SPINLOCK(consoleloglock);
 
-#ifdef CONFIG_MAGIC_SYSRQ
 static int vio_sysrq_pressed;
-extern int sysrq_enabled;
-#endif
-
-/*
- * The structure of the events that flow between us and OS/400.  You can't
- * mess with this unless the OS/400 side changes too
- */
-struct viocharlpevent {
-       struct HvLpEvent event;
-       u32 reserved;
-       u16 version;
-       u16 subtype_result_code;
-       u8 virtual_device;
-       u8 len;
-       u8 data[VIOCHAR_MAX_DATA];
-};
-
-#define VIOCHAR_WINDOW         10
-#define VIOCHAR_HIGHWATERMARK  3
-
-enum viocharsubtype {
-       viocharopen = 0x0001,
-       viocharclose = 0x0002,
-       viochardata = 0x0003,
-       viocharack = 0x0004,
-       viocharconfig = 0x0005
-};
-
-enum viochar_rc {
-       viochar_rc_ebusy = 1
-};
 
 #define VIOCHAR_NUM_BUF                16
 
@@ -966,8 +934,10 @@ static void vioHandleData(struct HvLpEvent *event)
         */
        num_pushed = 0;
        for (index = 0; index < cevent->len; index++) {
-#ifdef CONFIG_MAGIC_SYSRQ
-               if (sysrq_enabled) {
+               /*
+                * Will be optimized away if !CONFIG_MAGIC_SYSRQ:
+                */
+               if (sysrq_on()) {
                        /* 0x0f is the ascii character for ^O */
                        if (cevent->data[index] == '\x0f') {
                                vio_sysrq_pressed = 1;
@@ -977,7 +947,7 @@ static void vioHandleData(struct HvLpEvent *event)
                                 */
                                continue;
                        } else if (vio_sysrq_pressed) {
-                               handle_sysrq(cevent->data[index], NULL, tty);
+                               handle_sysrq(cevent->data[index], tty);
                                vio_sysrq_pressed = 0;
                                /*
                                 * continue because we don't want to add
@@ -986,7 +956,6 @@ static void vioHandleData(struct HvLpEvent *event)
                                continue;
                        }
                }
-#endif
                /*
                 * The sysrq sequence isn't included in this check if
                 * sysrq is enabled and compiled into the kernel because
@@ -1077,7 +1046,7 @@ static int send_open(HvLpIndex remoteLp, void *sem)
                        0, 0, 0, 0);
 }
 
-static struct tty_operations serial_ops = {
+static const struct tty_operations serial_ops = {
        .open = viotty_open,
        .close = viotty_close,
        .write = viotty_write,
@@ -1092,6 +1061,9 @@ static int __init viocons_init2(void)
        atomic_t wait_flag;
        int rc;
 
+       if (!firmware_has_feature(FW_FEATURE_ISERIES))
+               return -ENODEV;
+
        /* +2 for fudge */
        rc = viopath_open(HvLpConfig_getPrimaryLpIndex(),
                        viomajorsubtype_chario, VIOCHAR_WINDOW + 2);
@@ -1177,12 +1149,16 @@ static int __init viocons_init(void)
 {
        int i;
 
+       if (!firmware_has_feature(FW_FEATURE_ISERIES))
+               return -ENODEV;
+
        printk(VIOCONS_KERN_INFO "registering console\n");
        for (i = 0; i < VTTY_PORTS; i++) {
                port_info[i].lp = HvLpIndexInvalid;
                port_info[i].magic = VIOTTY_MAGIC;
        }
        HvCall_setLogBufferFormatAndCodepage(HvCall_LogBuffer_ASCII, 437);
+       add_preferred_console("viocons", 0, NULL);
        register_console(&viocons_early);
        return 0;
 }