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usb/isp1760: Fix problems that trigger WARNING at line 1136. 

1) A bug in the usage of time_after() in errata2_function().

2) Clear done_maps just prior to starting a new transfer in
   start_bus_transfer(), instead of just after, when done_map bits might have
   been validly set by the started transfer.

Signed-off-by: Arvid Brodin <arvid.brodin@enea.com>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Arvid Brodin 2011-08-21 08:29:28 +02:00 committed by Greg Kroah-Hartman
parent 38679b7200
commit 6477acc081
1 changed files with 20 additions and 18 deletions
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38
drivers/usb/host/isp1760-hcd.c
View File

@ -732,28 +732,29 @@ static void start_bus_transfer(struct usb_hcd *hcd, u32 ptd_offset, int slot,
WARN_ON(slots[slot].qh);
WARN_ON(qtd->status != QTD_PAYLOAD_ALLOC);
slots[slot].qtd = qtd;
slots[slot].qh = qh;
qh->slot = slot;
qtd->status = QTD_XFER_STARTED; /* Set this before writing ptd, since
interrupt routine may preempt and expects this value. */
slots[slot].timestamp = jiffies;
ptd_write(hcd->regs, ptd_offset, slot, ptd);
/* Make sure done map has not triggered from some unlinked transfer */
if (ptd_offset == ATL_PTD_OFFSET) {
priv->atl_done_map |= reg_read32(hcd->regs,
HC_ATL_PTD_DONEMAP_REG);
priv->atl_done_map &= ~(1 << qh->slot);
priv->atl_done_map &= ~(1 << slot);
} else {
priv->int_done_map |= reg_read32(hcd->regs,
HC_INT_PTD_DONEMAP_REG);
priv->int_done_map &= ~(1 << slot);
}
qh->slot = slot;
qtd->status = QTD_XFER_STARTED;
slots[slot].timestamp = jiffies;
slots[slot].qtd = qtd;
slots[slot].qh = qh;
ptd_write(hcd->regs, ptd_offset, slot, ptd);
if (ptd_offset == ATL_PTD_OFFSET) {
skip_map = reg_read32(hcd->regs, HC_ATL_PTD_SKIPMAP_REG);
skip_map &= ~(1 << qh->slot);
reg_write32(hcd->regs, HC_ATL_PTD_SKIPMAP_REG, skip_map);
} else {
priv->int_done_map |= reg_read32(hcd->regs,
HC_INT_PTD_DONEMAP_REG);
priv->int_done_map &= ~(1 << qh->slot);
skip_map = reg_read32(hcd->regs, HC_INT_PTD_SKIPMAP_REG);
skip_map &= ~(1 << qh->slot);
reg_write32(hcd->regs, HC_INT_PTD_SKIPMAP_REG, skip_map);
@ -1266,7 +1267,7 @@ leave:
* not to cause too much lag when this HW bug occurs, while still hopefully
* ensuring that the check does not falsely trigger.
*/
#define SLOT_TIMEOUT 180
#define SLOT_TIMEOUT 300
#define SLOT_CHECK_PERIOD 200
static struct timer_list errata2_timer;
@ -1281,16 +1282,17 @@ void errata2_function(unsigned long data)
spin_lock_irqsave(&priv->lock, spinflags);
for (slot = 0; slot < 32; slot++)
if ((priv->atl_slots[slot].qh || priv->atl_slots[slot].qtd) &&
time_after(jiffies + SLOT_TIMEOUT * HZ / 1000,
priv->atl_slots[slot].timestamp)) {
if (priv->atl_slots[slot].qh && time_after(jiffies,
priv->atl_slots[slot].timestamp +
SLOT_TIMEOUT * HZ / 1000)) {
ptd_read(hcd->regs, ATL_PTD_OFFSET, slot, &ptd);
if (!FROM_DW0_VALID(ptd.dw0) &&
!FROM_DW3_ACTIVE(ptd.dw3))
priv->atl_done_map |= 1 << slot;
}
handle_done_ptds(hcd);
if (priv->atl_done_map)
handle_done_ptds(hcd);
spin_unlock_irqrestore(&priv->lock, spinflags);