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libertas: fix spinlock recursion bug

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This fixes a bug detected by CONFIG_DEBUG_SPINLOCK:

if_cs_get_int_status() is only called from lbs_thread(), via
priv->hw_get_int_status. However, lbs_thread() has already taken the
priv->driver_lock. So it's a fault to take the same lock again here.

Signed-off-by: Holger Schurig <hs4233@mail.mn-solutions.de>
Acked-by: Dan Williams <dcbw@redhat.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Holger Schurig 2008-03-19 15:24:21 +01:00 committed by John W. Linville
parent 732c8bd590
commit dd1f635fe0
1 changed files with 0 additions and 2 deletions
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2
drivers/net/wireless/libertas/if_cs.c
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@ -677,9 +677,7 @@ sbi_get_int_status_exit:
/* Card has a command result for us */
if (*ireg & IF_CS_C_S_CMD_UPLD_RDY) {
spin_lock(&priv->driver_lock);
ret = if_cs_receive_cmdres(priv, priv->upld_buf, &priv->upld_len);
spin_unlock(&priv->driver_lock);
if (ret < 0)
lbs_pr_err("could not receive cmd from card\n");
}