From b85743ee95f3593ded82bca55cd3c38090ad001f Mon Sep 17 00:00:00 2001 From: Gavin Shan Date: Fri, 14 Nov 2014 10:47:28 +1100 Subject: powerpc/eeh: Refactor eeh_reset_pe() The patch refactors eeh_reset_pe() in order for: * Varied return values for different failure cases. * Replace pr_err() with pr_warn() and print function name. * Coding style cleanup. Signed-off-by: Gavin Shan Signed-off-by: Benjamin Herrenschmidt --- arch/powerpc/kernel/eeh.c | 29 ++++++++++++++++++----------- 1 file changed, 18 insertions(+), 11 deletions(-) diff --git a/arch/powerpc/kernel/eeh.c b/arch/powerpc/kernel/eeh.c index 2248a1999c6..967e4a08d82 100644 --- a/arch/powerpc/kernel/eeh.c +++ b/arch/powerpc/kernel/eeh.c @@ -758,30 +758,37 @@ static void eeh_reset_pe_once(struct eeh_pe *pe) int eeh_reset_pe(struct eeh_pe *pe) { int flags = (EEH_STATE_MMIO_ACTIVE | EEH_STATE_DMA_ACTIVE); - int i, rc; + int i, state, ret; /* Take three shots at resetting the bus */ - for (i=0; i<3; i++) { + for (i = 0; i < 3; i++) { eeh_reset_pe_once(pe); /* * EEH_PE_ISOLATED is expected to be removed after * BAR restore. */ - rc = eeh_ops->wait_state(pe, PCI_BUS_RESET_WAIT_MSEC); - if ((rc & flags) == flags) - return 0; + state = eeh_ops->wait_state(pe, PCI_BUS_RESET_WAIT_MSEC); + if ((state & flags) == flags) { + ret = 0; + goto out; + } - if (rc < 0) { - pr_err("%s: Unrecoverable slot failure on PHB#%d-PE#%x", + if (state < 0) { + pr_warn("%s: Unrecoverable slot failure on PHB#%d-PE#%x", __func__, pe->phb->global_number, pe->addr); - return -1; + ret = -ENOTRECOVERABLE; + goto out; } - pr_err("EEH: bus reset %d failed on PHB#%d-PE#%x, rc=%d\n", - i+1, pe->phb->global_number, pe->addr, rc); + + /* We might run out of credits */ + ret = -EIO; + pr_warn("%s: Failure %d resetting PHB#%x-PE#%x\n (%d)\n", + __func__, state, pe->phb->global_number, pe->addr, (i + 1)); } - return -1; +out: + return ret; } /** -- cgit v1.2.3-70-g09d2