This is a note to let you know that I've just added the patch titled
rtlwifi: rtl8192cu: Fix too long disable of IRQs
to the 3.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
rtlwifi-rtl8192cu-fix-too-long-disable-of-irqs.patch
and it can be found in the queue-3.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From a53268be0cb9763f11da4f6fe3fb924cbe3a7d4a Mon Sep 17 00:00:00 2001
From: Larry Finger <Larry.Finger@xxxxxxxxxxxx>
Date: Tue, 4 Mar 2014 16:53:50 -0600
Subject: rtlwifi: rtl8192cu: Fix too long disable of IRQs
From: Larry Finger <Larry.Finger@xxxxxxxxxxxx>
commit a53268be0cb9763f11da4f6fe3fb924cbe3a7d4a upstream.
In commit f78bccd79ba3cd9d9664981b501d57bdb81ab8a4 entitled "rtlwifi:
rtl8192ce: Fix too long disable of IRQs", Olivier Langlois
<olivier@xxxxxxxxxxxxxx> fixed a problem caused by an extra long disabling
of interrupts. This patch makes the same fix for rtl8192cu.
Signed-off-by: Larry Finger <Larry.Finger@xxxxxxxxxxxx>
Signed-off-by: John W. Linville <linville@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/net/wireless/rtlwifi/rtl8192cu/hw.c | 15 ++++++++++++++-
1 file changed, 14 insertions(+), 1 deletion(-)
--- a/drivers/net/wireless/rtlwifi/rtl8192cu/hw.c
+++ b/drivers/net/wireless/rtlwifi/rtl8192cu/hw.c
@@ -985,6 +985,17 @@ int rtl92cu_hw_init(struct ieee80211_hw
struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
int err = 0;
static bool iqk_initialized;
+ unsigned long flags;
+
+ /* As this function can take a very long time (up to 350 ms)
+ * and can be called with irqs disabled, reenable the irqs
+ * to let the other devices continue being serviced.
+ *
+ * It is safe doing so since our own interrupts will only be enabled
+ * in a subsequent step.
+ */
+ local_save_flags(flags);
+ local_irq_enable();
rtlhal->hw_type = HARDWARE_TYPE_RTL8192CU;
err = _rtl92cu_init_mac(hw);
@@ -997,7 +1008,7 @@ int rtl92cu_hw_init(struct ieee80211_hw
RT_TRACE(rtlpriv, COMP_ERR, DBG_WARNING,
"Failed to download FW. Init HW without FW now..\n");
err = 1;
- return err;
+ goto exit;
}
rtlhal->last_hmeboxnum = 0; /* h2c */
_rtl92cu_phy_param_tab_init(hw);
@@ -1034,6 +1045,8 @@ int rtl92cu_hw_init(struct ieee80211_hw
_InitPABias(hw);
_update_mac_setting(hw);
rtl92c_dm_init(hw);
+exit:
+ local_irq_restore(flags);
return err;
}
Patches currently in stable-queue which might be from Larry.Finger@xxxxxxxxxxxx are
queue-3.4/rtlwifi-rtl8192cu-fix-too-long-disable-of-irqs.patch
queue-3.4/rtlwifi-rtl8192se-fix-too-long-disable-of-irqs.patch
queue-3.4/b43-fix-machine-check-error-due-to-improper-access-of-b43_mmio_psm_phy_hdr.patch
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