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Subject[PATCH] rio
Hi Linus,

This patch fixes several problems with the RIO driver:

- Implemented breaks
- Fixed close wait implementation
- Fixed a DCD up/down crash
- Fixed for DCD on open
- Initialization of the spinlocks
- Added kmalloc return value check

Most of these fixes have already been submitted but were silently
ignored. Most of these fixes have already been merged into 2.2.18pre


Patrick


diff -u -r linux-2.4.0-test12-pre3.clean/drivers/char/generic_serial.c linux/drivers/char/generic_serial.c
--- linux-2.4.0-test12-pre3.clean/drivers/char/generic_serial.c Thu Nov 16 21:51:27 2000
+++ linux/drivers/char/generic_serial.c Thu Nov 30 13:41:15 2000
@@ -345,7 +345,7 @@
struct gs_port *port = ptr;
long end_jiffies;
int jiffies_to_transmit, charsleft = 0, rv = 0;
- int to, rcib;
+ int rcib;

func_enter();

@@ -369,6 +369,7 @@
return rv;
}
/* stop trying: now + twice the time it would normally take + seconds */
+ if (timeout == 0) timeout = MAX_SCHEDULE_TIMEOUT;
end_jiffies = jiffies;
if (timeout != MAX_SCHEDULE_TIMEOUT)
end_jiffies += port->baud?(2 * rcib * 10 * HZ / port->baud):0;
@@ -377,11 +378,9 @@
gs_dprintk (GS_DEBUG_FLUSH, "now=%lx, end=%lx (%ld).\n",
jiffies, end_jiffies, end_jiffies-jiffies);

- to = 100;
/* the expression is actually jiffies < end_jiffies, but that won't
work around the wraparound. Tricky eh? */
- while (to-- &&
- (charsleft = gs_real_chars_in_buffer (port->tty)) &&
+ while ((charsleft = gs_real_chars_in_buffer (port->tty)) &&
time_after (end_jiffies, jiffies)) {
/* Units check:
chars * (bits/char) * (jiffies /sec) / (bits/sec) = jiffies!
diff -u -r linux-2.4.0-test12-pre3.clean/drivers/char/rio/linux_compat.h linux/drivers/char/rio/linux_compat.h
--- linux-2.4.0-test12-pre3.clean/drivers/char/rio/linux_compat.h Fri Aug 11 23:51:33 2000
+++ linux/drivers/char/rio/linux_compat.h Thu Nov 30 14:50:29 2000
@@ -16,11 +16,13 @@
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/

+#include <asm/hardirq.h>
+

#define disable(oldspl) save_flags (oldspl)
#define restore(oldspl) restore_flags (oldspl)

-#define sysbrk(x) kmalloc ((x), GFP_KERNEL)
+#define sysbrk(x) kmalloc ((x),in_interrupt()? GFP_ATOMIC : GFP_KERNEL)
#define sysfree(p,size) kfree ((p))

#define WBYTE(p,v) writeb(v, &p)
diff -u -r linux-2.4.0-test12-pre3.clean/drivers/char/rio/rio_linux.c linux/drivers/char/rio/rio_linux.c
--- linux-2.4.0-test12-pre3.clean/drivers/char/rio/rio_linux.c Thu Nov 16 21:51:27 2000
+++ linux/drivers/char/rio/rio_linux.c Thu Nov 30 13:46:22 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,
@@ -203,11 +203,8 @@
unsigned int cmd, unsigned long arg);
static int rio_init_drivers(void);

-
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;

@@ -383,8 +380,8 @@

int rio_ismodem (kdev_t device)
{
- return (MAJOR (device) != RIO_NORMAL_MAJOR0) &&
- (MAJOR (device) != RIO_NORMAL_MAJOR1);
+ return (MAJOR (device) == RIO_NORMAL_MAJOR0) ||
+ (MAJOR (device) == RIO_NORMAL_MAJOR1);
}


@@ -455,7 +452,6 @@
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);

@@ -516,7 +512,7 @@

RIOServiceHost(p, HostP, irq);

- rio_dprintk ( RIO_DEBUG_IFLOW, "riointr() doing host %d type %d\n",
+ rio_dprintk ( RIO_DEBUG_IFLOW, "riointr() doing host %p type %d\n",
(int) ptr, HostP->Type);

clear_bit (RIO_BOARD_INTR_LOCK, &HostP->locks);
@@ -624,8 +620,12 @@
/* 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) {
@@ -654,8 +654,14 @@
exit minicom. I expect an "oops". -- REW */
static void rio_hungup (void *ptr)
{
- func_enter ();
+ struct Port *PortP;
+
+ func_enter();
+
+ PortP = (struct Port *)ptr;
+ PortP->gs.tty = NULL;
rio_dec_mod_count ();
+
func_exit ();
}

@@ -679,9 +685,8 @@
PortP->gs.count = 0;
}

-
+ PortP->gs.tty = NULL;
rio_dec_mod_count ();
-
func_exit ();
}

@@ -700,24 +705,28 @@
return rc;
}

+extern int RIOShortCommand(struct rio_info *p, struct Port *PortP,
+ int command, int len, int arg);

static int rio_ioctl (struct tty_struct * tty, struct file * filp,
unsigned int cmd, unsigned long arg)
{
-#if 0
int rc;
- struct rio_port *port = tty->driver_data;
+ struct Port *PortP;
int ival;

- /* func_enter2(); */
+ func_enter();

+ PortP = (struct Port *)tty->driver_data;

rc = 0;
switch (cmd) {
+#if 0
case TIOCGSOFTCAR:
rc = Put_user(((tty->termios->c_cflag & CLOCAL) ? 1 : 0),
(unsigned int *) arg);
break;
+#endif
case TIOCSSOFTCAR:
if ((rc = verify_area(VERIFY_READ, (void *) arg,
sizeof(int))) == 0) {
@@ -730,13 +739,39 @@
case TIOCGSERIAL:
if ((rc = verify_area(VERIFY_WRITE, (void *) arg,
sizeof(struct serial_struct))) == 0)
- gs_getserial(&port->gs, (struct serial_struct *) arg);
+ 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,
sizeof(struct serial_struct))) == 0)
- rc = gs_setserial(&port->gs, (struct serial_struct *) arg);
+ rc = gs_setserial(&PortP->gs, (struct serial_struct *) arg);
break;
+#if 0
case TIOCMGET:
if ((rc = verify_area(VERIFY_WRITE, (void *) arg,
sizeof(unsigned int))) == 0) {
@@ -768,17 +803,13 @@
((ival & TIOCM_RTS) ? 1 : 0));
}
break;
-
+#endif
default:
rc = -ENOIOCTLCMD;
break;
}
- /* func_exit(); */
+ func_exit();
return rc;
-#else
- return -ENOIOCTLCMD;
-#endif
-
}


@@ -1253,6 +1284,7 @@
hp->Type = RIO_PCI;
hp->Copy = rio_pcicopy;
hp->Mode = RIO_PCI_BOOT_FROM_RAM;
+ hp->HostLock = SPIN_LOCK_UNLOCKED;

rio_dprintk (RIO_DEBUG_PROBE, "Ivec: %x\n", hp->Ivec);
rio_dprintk (RIO_DEBUG_PROBE, "Mode: %x\n", hp->Mode);
@@ -1308,6 +1340,7 @@
* Moreover, the ISA card will work with the
* special PCI copy anyway. -- REW */
hp->Mode = 0;
+ hp->HostLock = SPIN_LOCK_UNLOCKED;

vpdp = get_VPD_PROM (hp);
rio_dprintk (RIO_DEBUG_PROBE, "Got VPD ROM\n");
diff -u -r linux-2.4.0-test12-pre3.clean/drivers/char/rio/rio_linux.h linux/drivers/char/rio/rio_linux.h
--- linux-2.4.0-test12-pre3.clean/drivers/char/rio/rio_linux.h Fri Aug 11 23:51:33 2000
+++ linux/drivers/char/rio/rio_linux.h Thu Nov 30 14:50:29 2000
@@ -94,29 +94,28 @@
recompile.... */
#if 1
#define rio_spin_lock_irqsave(sem, flags) do { \
+ spin_lock_irqsave(sem, flags);\
rio_dprintk (RIO_DEBUG_SPINLOCK, "spinlockirqsave: %p %s:%d\n", \
- sem, __FILE__, __LINE__);\
- spin_lock_irqsave(sem, flags);\
- } while (0)
+ sem, __FILE__, __LINE__);\
+ } while (0)

#define rio_spin_unlock_irqrestore(sem, flags) do { \
rio_dprintk (RIO_DEBUG_SPINLOCK, "spinunlockirqrestore: %p %s:%d\n",\
- sem, __FILE__, __LINE__);\
- spin_unlock_irqrestore(sem, flags);\
- } while (0)
-
+ sem, __FILE__, __LINE__);\
+ spin_unlock_irqrestore(sem, flags);\
+ } while (0)

#define rio_spin_lock(sem) do { \
+ spin_lock(sem);\
rio_dprintk (RIO_DEBUG_SPINLOCK, "spinlock: %p %s:%d\n",\
- sem, __FILE__, __LINE__);\
- spin_lock(sem);\
- } while (0)
+ sem, __FILE__, __LINE__);\
+ } while (0)

#define rio_spin_unlock(sem) do { \
rio_dprintk (RIO_DEBUG_SPINLOCK, "spinunlock: %p %s:%d\n",\
- sem, __FILE__, __LINE__);\
- spin_unlock(sem);\
- } while (0)
+ sem, __FILE__, __LINE__);\
+ spin_unlock(sem);\
+ } while (0)
#else
#define rio_spin_lock_irqsave(sem, flags) \
spin_lock_irqsave(sem, flags)
@@ -165,7 +164,7 @@
#define rio_memcpy_fromio memcpy_fromio
#endif

-#define DEBUG
+#define DEBUG 1


/*
diff -u -r linux-2.4.0-test12-pre3.clean/drivers/char/rio/rioboot.c linux/drivers/char/rio/rioboot.c
--- linux-2.4.0-test12-pre3.clean/drivers/char/rio/rioboot.c Fri Aug 11 23:51:33 2000
+++ linux/drivers/char/rio/rioboot.c Wed Nov 29 11:35:35 2000
@@ -38,11 +38,11 @@
#include <linux/module.h>
#include <linux/malloc.h>
#include <linux/errno.h>
+#include <linux/interrupt.h>
#include <asm/io.h>
#include <asm/system.h>
#include <asm/string.h>
#include <asm/semaphore.h>
-

#include <linux/termios.h>
#include <linux/serial.h>
diff -u -r linux-2.4.0-test12-pre3.clean/drivers/char/rio/riocmd.c linux/drivers/char/rio/riocmd.c
--- linux-2.4.0-test12-pre3.clean/drivers/char/rio/riocmd.c Fri Aug 11 23:51:33 2000
+++ linux/drivers/char/rio/riocmd.c Thu Nov 30 13:48:19 2000
@@ -38,6 +38,9 @@
#include <linux/module.h>
#include <linux/malloc.h>
#include <linux/errno.h>
+#include <linux/smp.h>
+#include <linux/interrupt.h>
+#include <asm/ptrace.h>
#include <asm/io.h>
#include <asm/system.h>
#include <asm/string.h>
@@ -80,7 +83,6 @@
#include "control.h"
#include "cirrus.h"

-
static struct IdentifyRta IdRta;
static struct KillNeighbour KillUnit;

@@ -548,6 +550,8 @@
*/
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)))) {
@@ -622,7 +626,8 @@
struct CmdBlk *CmdBlkP;

CmdBlkP = (struct CmdBlk *)sysbrk(sizeof(struct CmdBlk));
- bzero(CmdBlkP, sizeof(struct CmdBlk));
+ if (CmdBlkP)
+ bzero(CmdBlkP, sizeof(struct CmdBlk));

return CmdBlkP;
}
@@ -782,6 +787,7 @@
** routine that uses the RUP lock.
*/
rio_spin_unlock_irqrestore(&UnixRupP->RupLock, flags);
+
FreeMe= RIOCommandRup(p, Rup,HostP,PacketP);
if (PacketP->data[5] == MEMDUMP) {
rio_dprintk (RIO_DEBUG_CMD, "Memdump from 0x%x complete\n",
diff -u -r linux-2.4.0-test12-pre3.clean/drivers/char/rio/rioinit.c linux/drivers/char/rio/rioinit.c
--- linux-2.4.0-test12-pre3.clean/drivers/char/rio/rioinit.c Fri Aug 11 23:51:33 2000
+++ linux/drivers/char/rio/rioinit.c Wed Nov 29 11:35:35 2000
@@ -1446,7 +1446,7 @@
}
RIODefaultName(p, HostP, rup);
}
- HostP->UnixRups[rup].RupLock = -1;
+ HostP->UnixRups[rup].RupLock = SPIN_LOCK_UNLOCKED;
}
}
}
diff -u -r linux-2.4.0-test12-pre3.clean/drivers/char/rio/riointr.c linux/drivers/char/rio/riointr.c
--- linux-2.4.0-test12-pre3.clean/drivers/char/rio/riointr.c Fri Aug 11 23:51:33 2000
+++ linux/drivers/char/rio/riointr.c Thu Nov 30 15:22:08 2000
@@ -273,7 +273,7 @@
for ( host=0; host<p->RIONumHosts; host++ ) {
struct Host *HostP = &p->RIOHosts[host];

- rio_dprintk (RIO_DEBUG_INTR, "riointr() doing host %d type %d\n", host, HostP->Type);
+ rio_dprintk (RIO_DEBUG_INTR, "riointr() doing host %p type %d\n", host, HostP->Type);

switch( HostP->Type ) {
case RIO_AT:
diff -u -r linux-2.4.0-test12-pre3.clean/drivers/char/rio/riotable.c linux/drivers/char/rio/riotable.c
--- linux-2.4.0-test12-pre3.clean/drivers/char/rio/riotable.c Fri Aug 11 23:51:33 2000
+++ linux/drivers/char/rio/riotable.c Wed Nov 29 11:35:35 2000
@@ -37,6 +37,8 @@
#include <linux/module.h>
#include <linux/malloc.h>
#include <linux/errno.h>
+#include <linux/interrupt.h>
+
#include <asm/io.h>
#include <asm/system.h>
#include <asm/string.h>
diff -u -r linux-2.4.0-test12-pre3.clean/drivers/char/rio/riotty.c linux/drivers/char/rio/riotty.c
--- linux-2.4.0-test12-pre3.clean/drivers/char/rio/riotty.c Fri Aug 11 23:51:33 2000
+++ linux/drivers/char/rio/riotty.c Thu Nov 30 13:49:21 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);


@@ -451,8 +451,11 @@
PortP->gs.tty->termios->c_state |= WOPEN;
*/
PortP->State |= RIO_WOPEN;
+ rio_spin_unlock_irqrestore(&PortP->portSem, flags);
+ if (RIODelay (PortP, HUNDRED_MS) == RIO_FAIL)
#if 0
if ( sleep((caddr_t)&tp->tm.c_canqo, TTIPRI|PCATCH))
+#endif
{
/*
** ACTION: verify that this is a good thing
@@ -470,7 +473,6 @@
func_exit ();
return -EINTR;
}
-#endif
}
PortP->State &= ~RIO_WOPEN;
}
@@ -507,6 +509,7 @@

rio_spin_unlock_irqrestore(&PortP->portSem, flags);
rio_dprintk (RIO_DEBUG_TTY, "Returning from open\n");
+
func_exit ();
return 0;
}
@@ -526,8 +529,10 @@
#endif
struct Port *PortP =ptr; /* pointer to the port structure */
int deleted = 0;
- int try = 25;
- int repeat_this = 0xff;
+ int try = -1; /* Disable the timeouts by setting them to -1 */
+ int repeat_this = -1; /* Congrats to those having 15 years of
+ uptime! (You get to break the driver.) */
+ long end_time;
struct tty_struct * tty;
unsigned long flags;
int Modem;
@@ -540,6 +545,12 @@
/* tp = PortP->TtyP;*/ /* Get tty */
tty = PortP->gs.tty;
rio_dprintk (RIO_DEBUG_TTY, "TTY is at address 0x%x\n",(int)tty);
+
+ if (PortP->gs.closing_wait)
+ end_time = jiffies + PortP->gs.closing_wait;
+ else
+ end_time = jiffies + MAX_SCHEDULE_TIMEOUT;
+
Modem = rio_ismodem(tty->device);
#if 0
/* What F.CKING cache? Even then, a higly idle multiprocessor,
@@ -572,7 +583,8 @@
** clear the open bits for this device
*/
PortP->State &= (Modem ? ~RIO_MOPEN : ~RIO_LOPEN);
-
+ PortP->State &= ~RIO_CARR_ON;
+ PortP->ModemState &= ~MSVR1_CD;
/*
** If the device was open as both a Modem and a tty line
** then we need to wimp out here, as the port has not really
@@ -604,7 +616,7 @@
*/
rio_dprintk (RIO_DEBUG_TTY, "Timeout 1 starts\n");

-#if 0
+
if (!deleted)
while ( (PortP->InUse != NOT_INUSE) && !p->RIOHalted &&
(PortP->TxBufferIn != PortP->TxBufferOut) ) {
@@ -625,7 +637,7 @@
}
rio_spin_lock_irqsave(&PortP->portSem, flags);
}
-#endif
+
PortP->TxBufferIn = PortP->TxBufferOut = 0;
repeat_this = 0xff;

@@ -661,7 +673,7 @@
if (!deleted)
while (try && (PortP->PortState & PORT_ISOPEN)) {
try--;
- if (try == 0) {
+ if (time_after (jiffies, end_time)) {
rio_dprintk (RIO_DEBUG_TTY, "Run out of tries - force the bugger shut!\n" );
RIOPreemptiveCmd(p, PortP,FCLOSE);
break;
@@ -673,7 +685,11 @@
RIOClearUp( PortP );
goto close_end;
}
- RIODelay_ni(PortP, HUNDRED_MS);
+ if (RIODelay(PortP, HUNDRED_MS) == RIO_FAIL) {
+ rio_dprintk (RIO_DEBUG_TTY, "RTA EINTR in delay \n");
+ RIOPreemptiveCmd(p, PortP,FCLOSE);
+ break;
+ }
}
rio_spin_lock_irqsave(&PortP->portSem, flags);
rio_dprintk (RIO_DEBUG_TTY, "Close: try was %d on completion\n", try );
@@ -778,7 +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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