Hi alan,
This patches fixes several isues with the rio driver:
- Implemented breaks
- Fixed a DCD up/down crash
- Added kmalloc return value check
Sorry for the late moment we submit this: the DCD bug was very, very hard
to find.
Patrick
diff -u -r linux-2.2.18-pre24.clean/drivers/char/generic_serial.c
linux-2.2.18-pre24.rio_break/drivers/char/generic_serial.c
--- linux-2.2.18-pre24.clean/drivers/char/generic_serial.c Wed Nov 29 11:10:01
2000
+++ linux-2.2.18-pre24.rio_break/drivers/char/generic_serial.c Wed Dec 6 14:27:36
+2000
@@ -29,7 +29,7 @@
#include <linux/compatmac.h>
#include <linux/generic_serial.h>
-#define DEBUG
+#define DEBUG 1
static char * tmp_buf;
static DECLARE_MUTEX(tmp_buf_sem);
@@ -575,7 +575,7 @@
port->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CALLOUT_ACTIVE |GS_ACTIVE);
port->tty = NULL;
port->count = 0;
-
+ port->event = 0;
wake_up_interruptible(&port->open_wait);
func_exit ();
}
@@ -750,9 +750,13 @@
if (!port) return;
if (!port->tty) {
+ port->rd->hungup (port);
+ return;
+#if 0
/* This seems to happen when this is called from vhangup. */
gs_dprintk (GS_DEBUG_CLOSE, "gs: Odd: port->tty is NULL\n");
port->tty = tty;
+#endif
}
save_flags(flags); cli();
diff -u -r linux-2.2.18-pre24.clean/drivers/char/rio/rio_linux.c
linux-2.2.18-pre24.rio_break/drivers/char/rio/rio_linux.c
--- linux-2.2.18-pre24.clean/drivers/char/rio/rio_linux.c Wed Nov 29 11:10:01
2000
+++ linux-2.2.18-pre24.rio_break/drivers/char/rio/rio_linux.c Wed Dec 6 14:27:29
+2000
@@ -165,7 +165,7 @@
/* startuptime */ HZ*2, /* how long to wait for card to run */
/* slowcook */ 0, /* TRUE -> always use line disc. */
/* intrpolltime */ 1, /* The frequency of OUR polls */
- /* breakinterval */ 25, /* x10 mS */
+ /* breakinterval */ 25, /* x10 mS XXX: units seem to be 1ms not 10!
+-- REW*/
/* timer */ 10, /* mS */
/* RtaLoadBase */ 0x7000,
/* HostLoadBase */ 0x7C00,
@@ -205,11 +205,11 @@
static INT rio_fw_release(struct inode *inode, struct file *filp);
static int rio_init_drivers(void);
+int RIOShortCommand(struct rio_info *p, struct Port *PortP,
+ int command, int len, int arg);
void my_hd (void *addr, int len);
-
-
static struct tty_driver rio_driver, rio_callout_driver;
static struct tty_driver rio_driver2, rio_callout_driver2;
@@ -458,7 +458,6 @@
func_enter ();
HostP = (struct Host*)ptr; /* &p->RIOHosts[(long)ptr]; */
-
rio_dprintk (RIO_DEBUG_IFLOW, "rio: enter rio_interrupt (%d/%d)\n",
irq, HostP->Ivec);
@@ -519,8 +518,8 @@
RIOServiceHost(p, HostP, irq);
- rio_dprintk ( RIO_DEBUG_IFLOW, "riointr() doing host %d type %d\n",
- (int) ptr, HostP->Type);
+ rio_dprintk ( RIO_DEBUG_IFLOW, "riointr() doing host %p type %d\n",
+ ptr, HostP->Type);
clear_bit (RIO_BOARD_INTR_LOCK, &HostP->locks);
rio_dprintk (RIO_DEBUG_IFLOW, "rio: exit rio_interrupt (%d/%d)\n",
@@ -627,8 +626,12 @@
/* Nothing special here... */
static void rio_shutdown_port (void * ptr)
{
+ struct Port *PortP;
+
func_enter();
+ PortP = (struct Port *)ptr;
+ PortP->gs.tty = NULL;
#if 0
port->gs.flags &= ~ GS_ACTIVE;
if (!port->gs.tty) {
@@ -706,9 +709,8 @@
PortP->gs.count = 0;
}
-
+ PortP->gs.tty = NULL;
rio_dec_mod_count ();
-
func_exit ();
}
@@ -756,10 +758,36 @@
(ival ? CLOCAL : 0);
}
break;
+
case TIOCGSERIAL:
if ((rc = verify_area(VERIFY_WRITE, (void *) arg,
sizeof(struct serial_struct))) == 0)
gs_getserial(&PortP->gs, (struct serial_struct *) arg);
+ break;
+ case TCSBRK:
+ if ( PortP->State & RIO_DELETED ) {
+ rio_dprintk (RIO_DEBUG_TTY, "BREAK on deleted RTA\n");
+ rc = -EIO;
+ } else {
+ if (RIOShortCommand(p, PortP, SBREAK, 2, 250) == RIO_FAIL) {
+ rio_dprintk (RIO_DEBUG_INTR, "SBREAK RIOShortCommand failed\n");
+ rc = -EIO;
+ }
+ }
+ break;
+ case TCSBRKP:
+ if ( PortP->State & RIO_DELETED ) {
+ rio_dprintk (RIO_DEBUG_TTY, "BREAK on deleted RTA\n");
+ rc = -EIO;
+ } else {
+ int l;
+ l = arg?arg*100:250;
+ if (l > 255) l = 255;
+ if (RIOShortCommand(p, PortP, SBREAK, 2, arg?arg*100:250) == RIO_FAIL) {
+ rio_dprintk (RIO_DEBUG_INTR, "SBREAK RIOShortCommand failed\n");
+ rc = -EIO;
+ }
+ }
break;
case TIOCSSERIAL:
if ((rc = verify_area(VERIFY_READ, (void *) arg,
diff -u -r linux-2.2.18-pre24.clean/drivers/char/rio/rio_linux.h
linux-2.2.18-pre24.rio_break/drivers/char/rio/rio_linux.h
--- linux-2.2.18-pre24.clean/drivers/char/rio/rio_linux.h Wed Nov 29 11:10:01
2000
+++ linux-2.2.18-pre24.rio_break/drivers/char/rio/rio_linux.h Wed Dec 6 11:52:54
+2000
@@ -165,7 +165,7 @@
#define rio_memcpy_fromio memcpy_fromio
#endif
-#define DEBUG
+#define DEBUG 1
/*
diff -u -r linux-2.2.18-pre24.clean/drivers/char/rio/riocmd.c
linux-2.2.18-pre24.rio_break/drivers/char/rio/riocmd.c
--- linux-2.2.18-pre24.clean/drivers/char/rio/riocmd.c Fri Dec 1 16:16:59 2000
+++ linux-2.2.18-pre24.rio_break/drivers/char/rio/riocmd.c Wed Dec 6 10:25:40
+2000
@@ -536,7 +536,7 @@
PortP->ModemState, ReportedModemStatus);
PortP->ModemState = ReportedModemStatus;
#ifdef MODEM_SUPPORT
- if ( PortP->Mapped ) {
+ if ( PortP->Mapped && (PortP->PortState & PORT_ISOPEN)
+&& !(PortP->PortState & RIO_CLOSING)) {
/***********************************************************\
*************************************************************
***
***
@@ -548,14 +548,14 @@
** If the device is a modem, then check the modem
** carrier.
*/
+
if (PortP->gs.tty == NULL)
break;
if (PortP->gs.tty->termios == NULL)
break;
-
- if (!(PortP->gs.tty->termios->c_cflag & CLOCAL) &&
- ((PortP->State & (RIO_MOPEN|RIO_WOPEN)))) {
+ if (!(PortP->gs.tty->termios->c_cflag & CLOCAL) &&
+ ((PortP->State & (RIO_MOPEN|RIO_WOPEN)))) {
rio_dprintk (RIO_DEBUG_CMD, "Is there a
Carrier?\n");
/*
** Is there a carrier?
@@ -581,8 +581,9 @@
** Has carrier just dropped?
*/
if (PortP->State & RIO_CARR_ON) {
- if (PortP->State &
(PORT_ISOPEN|RIO_WOPEN|RIO_MOPEN))
- tty_hangup
(PortP->gs.tty);
+ if (PortP->State &
+(PORT_ISOPEN|RIO_WOPEN|RIO_MOPEN))
+ tty_hangup (PortP->gs.tty);
+
PortP->State &= ~RIO_CARR_ON;
rio_dprintk (RIO_DEBUG_CMD,
"Carrirer just went down\n");
#ifdef STATS
diff -u -r linux-2.2.18-pre24.clean/drivers/char/rio/riotty.c
linux-2.2.18-pre24.rio_break/drivers/char/rio/riotty.c
--- linux-2.2.18-pre24.clean/drivers/char/rio/riotty.c Wed Nov 29 11:10:02 2000
+++ linux-2.2.18-pre24.rio_break/drivers/char/rio/riotty.c Wed Dec 6 10:02:15
+2000
@@ -95,7 +95,7 @@
#endif
static void RIOClearUp(struct Port *PortP);
-static int RIOShortCommand(struct rio_info *p, struct Port *PortP,
+int RIOShortCommand(struct rio_info *p, struct Port *PortP,
int command, int len, int arg);
@@ -793,7 +794,7 @@
** Other values of len aren't allowed, and will cause
** a panic.
*/
-static int RIOShortCommand(struct rio_info *p, struct Port *PortP,
+int RIOShortCommand(struct rio_info *p, struct Port *PortP,
int command, int len, int arg)
{
PKT *PacketP;
-
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