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Subject[PATCH 2.5] : Wavelan ISA update
From
	Hi Jeff,

Could you please push the following patch upstream ?
A few cleanups for the good old Wavelan ISA driver. Tested on
2.5.32 SMP.

Have fun...

Jean

----------------------------------------------------------

diff -u -p linux/drivers/net/wireless/wavelan.p.25.h linux/drivers/net/wireless/wavelan.p.h
--- linux/drivers/net/wireless/wavelan.p.25.h Tue Sep 3 14:39:56 2002
+++ linux/drivers/net/wireless/wavelan.p.h Wed Sep 4 15:22:23 2002
@@ -351,6 +351,12 @@
* o got rid of wavelan_ioctl()
* o use a bunch of iw_handler instead
*
+ * Changes made for release in 2.5.35 :
+ * ----------------------------------
+ * - Set dev->trans_start to avoid filling the logs
+ * - Handle better spurious/bogus interrupt
+ * - Avoid deadlocks in mmc_out()/mmc_in()
+ *
* Wishes & dreams:
* ----------------
* - roaming (see Pcmcia driver)
diff -u -p linux/drivers/net/wireless/wavelan.25.c linux/drivers/net/wireless/wavelan.c
--- linux/drivers/net/wireless/wavelan.25.c Tue Sep 3 14:39:45 2002
+++ linux/drivers/net/wireless/wavelan.c Wed Sep 4 15:27:10 2002
@@ -312,8 +312,11 @@ static void update_psa_checksum(device *
*/
static inline void mmc_out(unsigned long ioaddr, u16 o, u8 d)
{
+ int count = 0;
+
/* Wait for MMC to go idle */
- while (inw(HASR(ioaddr)) & HASR_MMC_BUSY);
+ while ((count++ < 100) && (inw(HASR(ioaddr)) & HASR_MMC_BUSY))
+ udelay(10);

outw((u16) (((u16) d << 8) | (o << 1) | 1), MMCR(ioaddr));
}
@@ -339,10 +342,14 @@ static inline void mmc_write(unsigned lo
*/
static inline u8 mmc_in(unsigned long ioaddr, u16 o)
{
- while (inw(HASR(ioaddr)) & HASR_MMC_BUSY);
+ int count = 0;
+
+ while ((count++ < 100) && (inw(HASR(ioaddr)) & HASR_MMC_BUSY))
+ udelay(10);
outw(o << 1, MMCR(ioaddr));

- while (inw(HASR(ioaddr)) & HASR_MMC_BUSY);
+ while ((count++ < 100) && (inw(HASR(ioaddr)) & HASR_MMC_BUSY))
+ udelay(10);
return (u8) (inw(MMCR(ioaddr)) >> 8);
}

@@ -2958,6 +2965,9 @@ static inline int wv_packet_write(device
(unsigned char *) &nop.nop_h.ac_link,
sizeof(nop.nop_h.ac_link));

+ /* Make sure the watchdog will keep quiet for a while */
+ dev->trans_start = jiffies;
+
/* Keep stats up to date. */
lp->stats.tx_bytes += length;

@@ -3874,29 +3884,48 @@ static void wavelan_interrupt(int irq, v
* the spinlock. */
spin_lock(&lp->spinlock);

+ /* We always had spurious interrupts at startup, but lately I
+ * saw them comming *between* the request_irq() and the
+ * spin_lock_irqsave() in wavelan_open(), so the spinlock
+ * protection is no enough.
+ * So, we also check lp->hacr that will tell us is we enabled
+ * irqs or not (see wv_ints_on()).
+ * We can't use netif_running(dev) because we depend on the
+ * proper processing of the irq generated during the config. */
+
+ /* Which interrupt it is ? */
+ hasr = hasr_read(ioaddr);
+
+#ifdef DEBUG_INTERRUPT_INFO
+ printk(KERN_INFO
+ "%s: wavelan_interrupt(): hasr 0x%04x; hacr 0x%04x.\n",
+ dev->name, hasr, lp->hacr);
+#endif
+
/* Check modem interrupt */
- if ((hasr = hasr_read(ioaddr)) & HASR_MMC_INTR) {
+ if ((hasr & HASR_MMC_INTR) && (lp->hacr & HACR_MMC_INT_ENABLE)) {
u8 dce_status;

+#ifdef DEBUG_INTERRUPT_ERROR
+ printk(KERN_INFO
+ "%s: wavelan_interrupt(): unexpected mmc interrupt: status 0x%04x.\n",
+ dev->name, dce_status);
+#endif
/*
* Interrupt from the modem management controller.
* This will clear it -- ignored for now.
*/
mmc_read(ioaddr, mmroff(0, mmr_dce_status), &dce_status,
sizeof(dce_status));
-#ifdef DEBUG_INTERRUPT_ERROR
- printk(KERN_INFO
- "%s: wavelan_interrupt(): unexpected mmc interrupt: status 0x%04x.\n",
- dev->name, dce_status);
-#endif
}

/* Check if not controller interrupt */
- if ((hasr & HASR_82586_INTR) == 0) {
+ if (((hasr & HASR_82586_INTR) == 0) ||
+ ((lp->hacr & HACR_82586_INT_ENABLE) == 0)) {
#ifdef DEBUG_INTERRUPT_ERROR
printk(KERN_INFO
- "%s: wavelan_interrupt(): interrupt not coming from i82586\n",
- dev->name);
+ "%s: wavelan_interrupt(): interrupt not coming from i82586 - hasr 0x%04x.\n",
+ dev->name, hasr);
#endif
spin_unlock (&lp->spinlock);
return;
-
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