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iwlegacy: dump stack when fail to gain access to the device

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Print dump stack when the device is not responding. This should give
some more clue about the reason of failure. Also change the message we
print, since "MAC in deep sleep" is kinda confusing.

On the way add unlikely(), as fail to gain NIC access is hmm ...
unlikely.

Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Stanislaw Gruszka 2012-02-13 11:23:08 +01:00 committed by John W. Linville
parent 3fccdcf509
commit b6603036ad
1 changed files with 3 additions and 2 deletions
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5
drivers/net/wireless/iwlegacy/common.c
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@ -111,9 +111,10 @@ _il_grab_nic_access(struct il_priv *il)
_il_poll_bit(il, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_VAL_MAC_ACCESS_EN,
(CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY |
CSR_GP_CNTRL_REG_FLAG_GOING_TO_SLEEP), 15000);
if (ret < 0) {
if (unlikely(ret < 0)) {
val = _il_rd(il, CSR_GP_CNTRL);
IL_ERR("MAC is in deep sleep!. CSR_GP_CNTRL = 0x%08X\n", val);
WARN_ONCE(1, "Timeout waiting for ucode processor access "
"(CSR_GP_CNTRL 0x%08x)\n", val);
_il_wr(il, CSR_RESET, CSR_RESET_REG_FLAG_FORCE_NMI);
return -EIO;
}