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make sure there are no pending interrupts during setup

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This commit is contained in:
Marcus Overhagen
2012-09-14 18:58:57 +02:00
parent c2ff7a30e3
commit 863a181c0b
1 changed files with 10 additions and 0 deletions
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src/add-ons/kernel/busses/scsi/ahci/ahci_controller.cpp
+10
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@@ -122,6 +122,10 @@ AHCIController::Init()
return B_ERROR; return B_ERROR;
} }
// make sure interrupts are disabled
fRegs->ghc &= ~GHC_IE;
FlushPostedWrites();
if (ResetController() < B_OK) { if (ResetController() < B_OK) {
TRACE("controller reset failed\n"); TRACE("controller reset failed\n");
goto err; goto err;
@@ -194,6 +198,12 @@ AHCIController::Init()
} }
} }
// clear any pending interrupts
uint32 interruptsPending;
interruptsPending = fRegs->is;
fRegs->is = interruptsPending;
FlushPostedWrites();
// enable interrupts // enable interrupts
fRegs->ghc |= GHC_IE; fRegs->ghc |= GHC_IE;
FlushPostedWrites(); FlushPostedWrites();