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 <gwshan@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
diff --git a/arch/powerpc/kernel/eeh.c b/arch/powerpc/kernel/eeh.c
index 2248a19..967e4a0 100644
--- a/arch/powerpc/kernel/eeh.c
+++ b/arch/powerpc/kernel/eeh.c
@@ -758,30 +758,37 @@
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;
-
- if (rc < 0) {
- pr_err("%s: Unrecoverable slot failure on PHB#%d-PE#%x",
- __func__, pe->phb->global_number, pe->addr);
- return -1;
+ state = eeh_ops->wait_state(pe, PCI_BUS_RESET_WAIT_MSEC);
+ if ((state & flags) == flags) {
+ ret = 0;
+ 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);
+
+ if (state < 0) {
+ pr_warn("%s: Unrecoverable slot failure on PHB#%d-PE#%x",
+ __func__, pe->phb->global_number, pe->addr);
+ ret = -ENOTRECOVERABLE;
+ goto out;
+ }
+
+ /* 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;
}
/**