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authorPeter Hurley <peter@hurleysoftware.com>2013-03-27 06:56:01 -0400
committerStefan Richter <stefanr@s5r6.in-berlin.de>2013-04-30 20:30:16 +0200
commit67672134aaafd520a61dda448a662336e8fde236 (patch)
tree874ff8c53e6b89451619be290bce259b99f407fb /drivers/firewire
parentde97cb64a959fe5ccf828b02d3a78de9f9defb67 (diff)
downloadlinux-linaro-stable-67672134aaafd520a61dda448a662336e8fde236.tar.gz
firewire: ohci: Improve bus reset error messages
Many of the error messages possible from bus_reset_work() do not contain enough information to distinguish which error condition occurred nor enough information to evaluate the error afterwards. Differentiate all error conditions in bus_reset_work(); add additional information to make error diagnosis possible. [Stefan R: fixed self-ID endian conversion] Signed-off-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Diffstat (limited to 'drivers/firewire')
-rw-r--r--drivers/firewire/ohci.c27
1 files changed, 14 insertions, 13 deletions
diff --git a/drivers/firewire/ohci.c b/drivers/firewire/ohci.c
index 925a2a6fe68f..c64b4801adaa 100644
--- a/drivers/firewire/ohci.c
+++ b/drivers/firewire/ohci.c
@@ -1911,7 +1911,7 @@ static void bus_reset_work(struct work_struct *work)
reg = reg_read(ohci, OHCI1394_SelfIDCount);
if (reg & OHCI1394_SelfIDCount_selfIDError) {
- ohci_notice(ohci, "inconsistent self IDs\n");
+ ohci_notice(ohci, "self ID receive error\n");
return;
}
/*
@@ -1923,7 +1923,7 @@ static void bus_reset_work(struct work_struct *work)
self_id_count = (reg >> 3) & 0xff;
if (self_id_count > 252) {
- ohci_notice(ohci, "inconsistent self IDs\n");
+ ohci_notice(ohci, "bad selfIDSize (%08x)\n", reg);
return;
}
@@ -1931,7 +1931,10 @@ static void bus_reset_work(struct work_struct *work)
rmb();
for (i = 1, j = 0; j < self_id_count; i += 2, j++) {
- if (ohci->self_id_cpu[i] != ~ohci->self_id_cpu[i + 1]) {
+ u32 id = cond_le32_to_cpu(ohci->self_id_cpu[i]);
+ u32 id2 = cond_le32_to_cpu(ohci->self_id_cpu[i + 1]);
+
+ if (id != ~id2) {
/*
* If the invalid data looks like a cycle start packet,
* it's likely to be the result of the cycle master
@@ -1939,19 +1942,17 @@ static void bus_reset_work(struct work_struct *work)
* so far are valid and should be processed so that the
* bus manager can then correct the gap count.
*/
- if (cond_le32_to_cpu(ohci->self_id_cpu[i])
- == 0xffff008f) {
- ohci_notice(ohci,
- "ignoring spurious self IDs\n");
+ if (id == 0xffff008f) {
+ ohci_notice(ohci, "ignoring spurious self IDs\n");
self_id_count = j;
break;
- } else {
- ohci_notice(ohci, "inconsistent self IDs\n");
- return;
}
+
+ ohci_notice(ohci, "bad self ID %d/%d (%08x != ~%08x)\n",
+ j, self_id_count, id, id2);
+ return;
}
- ohci->self_id_buffer[j] =
- cond_le32_to_cpu(ohci->self_id_cpu[i]);
+ ohci->self_id_buffer[j] = id;
}
if (ohci->quirks & QUIRK_TI_SLLZ059) {
@@ -1964,7 +1965,7 @@ static void bus_reset_work(struct work_struct *work)
}
if (self_id_count == 0) {
- ohci_notice(ohci, "inconsistent self IDs\n");
+ ohci_notice(ohci, "no self IDs\n");
return;
}
rmb();