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Message-ID: <tkrat.999def4a37c1ecd9@s5r6.in-berlin.de> Date: Thu, 5 Jun 2008 20:50:53 +0200 (CEST) From: Stefan Richter <stefanr@...6.in-berlin.de> To: linux1394-devel@...ts.sourceforge.net cc: linux-kernel@...r.kernel.org Subject: [PATCH] firewire: fw-ohci: write selfIDBufferPtr before LinkControl.rcvSelfID OHCI 1.1 clause 5.10 requires that selfIDBufferPtr is valid when a 1 is written into LinkControl.rcvSelfID. This driver bug has so far not been known to cause harm because most chips obviously accept a later selfIDBufferPtr write. Signed-off-by: Stefan Richter <stefanr@...6.in-berlin.de> --- drivers/firewire/fw-ohci.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) Index: linux/drivers/firewire/fw-ohci.c =================================================================== --- linux.orig/drivers/firewire/fw-ohci.c +++ linux/drivers/firewire/fw-ohci.c @@ -1473,6 +1473,7 @@ static int ohci_enable(struct fw_card *c reg_write(ohci, OHCI1394_HCControlClear, OHCI1394_HCControl_noByteSwapData); + reg_write(ohci, OHCI1394_SelfIDBuffer, ohci->self_id_bus); reg_write(ohci, OHCI1394_LinkControlClear, OHCI1394_LinkControl_rcvPhyPkt); reg_write(ohci, OHCI1394_LinkControlSet, @@ -1488,7 +1489,6 @@ static int ohci_enable(struct fw_card *c ar_context_run(&ohci->ar_request_ctx); ar_context_run(&ohci->ar_response_ctx); - reg_write(ohci, OHCI1394_SelfIDBuffer, ohci->self_id_bus); reg_write(ohci, OHCI1394_PhyUpperBound, 0x00010000); reg_write(ohci, OHCI1394_IntEventClear, ~0); reg_write(ohci, OHCI1394_IntMaskClear, ~0); -- Stefan Richter -=====-==--- -==- --=-= http://arcgraph.de/sr/ -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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