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| author |   Stefan Richter <stefanr@s5r6.in-berlin.de> | 2010-06-05 11:46:49 +0200 |
|---|---|---|
| committer | Stefan Richter <stefanr@s5r6.in-berlin.de> | 2010-06-09 19:42:18 +0200 |
| commit | 148c7866c31d93f8c79366189075f5a26ad4556c (patch) | |
| tree | 2b82bfd64fcdf04a2fbb6bfca78e27c9c609110f /drivers/firewire/ohci.c | |
| parent | ieee1394: video1394: Use memdup_user (diff) | |
| download | linux-dev-148c7866c31d93f8c79366189075f5a26ad4556c.tar.xz linux-dev-148c7866c31d93f8c79366189075f5a26ad4556c.zip | |
firewire: ohci: do not enable interrupts without the handler
On 26 Apr 2010, Clemens Ladisch wrote:
> In theory, none of the interrupts should occur before the link is
> enabled. In practice, I'd rather make sure to not set the master
> interrupt enable bit until we have installed the interrupt handler.
and proposed to move OHCI1394_masterIntEnable out of the present
reg_write() into a new one before the HCControl.linkEnable reg_write().
Why not defer setting /all/ of the bits until right before linkEnable?
Reviewed-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Diffstat (limited to 'drivers/firewire/ohci.c')
| -rw-r--r-- | drivers/firewire/ohci.c | 24 |
1 files changed, 13 insertions, 11 deletions
diff --git a/drivers/firewire/ohci.c b/drivers/firewire/ohci.c index 07deac77bc13..9743a405e69c 100644 --- a/drivers/firewire/ohci.c +++ b/drivers/firewire/ohci.c @@ -1594,7 +1594,7 @@ static int ohci_enable(struct fw_card *card, { struct fw_ohci *ohci = fw_ohci(card); struct pci_dev *dev = to_pci_dev(card->device); - u32 lps; + u32 lps, irqs; int i, ret; if (software_reset(ohci)) { @@ -1648,16 +1648,6 @@ static int ohci_enable(struct fw_card *card, reg_write(ohci, OHCI1394_PhyUpperBound, 0x00010000); reg_write(ohci, OHCI1394_IntEventClear, ~0); reg_write(ohci, OHCI1394_IntMaskClear, ~0); - reg_write(ohci, OHCI1394_IntMaskSet, - OHCI1394_selfIDComplete | - OHCI1394_RQPkt | OHCI1394_RSPkt | - OHCI1394_reqTxComplete | OHCI1394_respTxComplete | - OHCI1394_isochRx | OHCI1394_isochTx | - OHCI1394_postedWriteErr | OHCI1394_cycleTooLong | - OHCI1394_cycleInconsistent | OHCI1394_regAccessFail | - OHCI1394_masterIntEnable); - if (param_debug & OHCI_PARAM_DEBUG_BUSRESETS) - reg_write(ohci, OHCI1394_IntMaskSet, OHCI1394_busReset); ret = configure_1394a_enhancements(ohci); if (ret < 0) @@ -1723,6 +1713,18 @@ static int ohci_enable(struct fw_card *card, return -EIO; } + irqs = OHCI1394_reqTxComplete | OHCI1394_respTxComplete | + OHCI1394_RQPkt | OHCI1394_RSPkt | + OHCI1394_isochTx | OHCI1394_isochRx | + OHCI1394_postedWriteErr | + OHCI1394_selfIDComplete | + OHCI1394_regAccessFail | + OHCI1394_cycleInconsistent | OHCI1394_cycleTooLong | + OHCI1394_masterIntEnable; + if (param_debug & OHCI_PARAM_DEBUG_BUSRESETS) + irqs |= OHCI1394_busReset; + reg_write(ohci, OHCI1394_IntMaskSet, irqs); + reg_write(ohci, OHCI1394_HCControlSet, OHCI1394_HCControl_linkEnable | OHCI1394_HCControl_BIBimageValid); |