mac80211: rt2x00: import upstream changes and rebase our patches

[openwrt/staging/lynxis/omap.git] / package / kernel / mac80211 / patches / 020-03-rt2x00usb-fix-anchor-initialization.patch

diff --git a/package/kernel/mac80211/patches/020-03-rt2x00usb-fix-anchor-initialization.patch b/package/kernel/mac80211/patches/020-03-rt2x00usb-fix-anchor-initialization.patch
new file mode 100644 (file)
index 0000000..78d8ac6
--- /dev/null
+++ b/package/kernel/mac80211/patches/020-03-rt2x00usb-fix-anchor-initialization.patch
@@ -0,0 +1,75 @@
+From 0488a6121dfe6cbd44de15ea3627913b7549a1e9 Mon Sep 17 00:00:00 2001
+From: Stanislaw Gruszka <sgruszka@redhat.com>
+Date: Wed, 8 Feb 2017 12:18:10 +0100
+Subject: [PATCH 03/19] rt2x00usb: fix anchor initialization
+
+If device fail to initialize we can OOPS in rt2x00lib_remove_dev(), due
+to using uninitialized usb_anchor structure:
+
+[  855.435820] ieee80211 phy3: rt2x00usb_vendor_request: Error - Vendor Request 0x07 failed for offset 0x1000 with error -19
+[  855.435826] ieee80211 phy3: rt2800_probe_rt: Error - Invalid RT chipset 0x0000, rev 0000 detected
+[  855.435829] ieee80211 phy3: rt2x00lib_probe_dev: Error - Failed to allocate device
+[  855.435845] BUG: unable to handle kernel NULL pointer dereference at 0000000000000028
+[  855.435900] IP: _raw_spin_lock_irq+0xd/0x30
+[  855.435926] PGD 0
+[  855.435953] Oops: 0002 [#1] SMP
+<snip>
+[  855.437011] Call Trace:
+[  855.437029]  ? usb_kill_anchored_urbs+0x27/0xc0
+[  855.437061]  rt2x00lib_remove_dev+0x190/0x1c0 [rt2x00lib]
+[  855.437097]  rt2x00lib_probe_dev+0x246/0x7a0 [rt2x00lib]
+[  855.437149]  ? ieee80211_roc_setup+0x9e/0xd0 [mac80211]
+[  855.437183]  ? __kmalloc+0x1af/0x1f0
+[  855.437207]  ? rt2x00usb_probe+0x13d/0xc50 [rt2x00usb]
+[  855.437240]  rt2x00usb_probe+0x155/0xc50 [rt2x00usb]
+[  855.437273]  rt2800usb_probe+0x15/0x20 [rt2800usb]
+[  855.437304]  usb_probe_interface+0x159/0x2d0
+[  855.437333]  driver_probe_device+0x2bb/0x460
+
+Patch changes initialization sequence to fix the problem.
+
+Cc: Vishal Thanki <vishalthanki@gmail.com>
+Fixes: 8b4c0009313f ("rt2x00usb: Use usb anchor to manage URB")
+Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
+Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
+---
+ drivers/net/wireless/ralink/rt2x00/rt2x00usb.c | 13 ++++++++-----
+ 1 file changed, 8 insertions(+), 5 deletions(-)
+
+diff --git a/drivers/net/wireless/ralink/rt2x00/rt2x00usb.c b/drivers/net/wireless/ralink/rt2x00/rt2x00usb.c
+index fe13dd07cc2a..c696f0ad6a68 100644
+--- a/drivers/net/wireless/ralink/rt2x00/rt2x00usb.c
++++ b/drivers/net/wireless/ralink/rt2x00/rt2x00usb.c
+@@ -825,10 +825,6 @@ int rt2x00usb_probe(struct usb_interface *usb_intf,
+       if (retval)
+               goto exit_free_device;
+ 
+-      retval = rt2x00lib_probe_dev(rt2x00dev);
+-      if (retval)
+-              goto exit_free_reg;
+-
+       rt2x00dev->anchor = devm_kmalloc(&usb_dev->dev,
+                                       sizeof(struct usb_anchor),
+                                       GFP_KERNEL);
+@@ -836,10 +832,17 @@ int rt2x00usb_probe(struct usb_interface *usb_intf,
+               retval = -ENOMEM;
+               goto exit_free_reg;
+       }
+-
+       init_usb_anchor(rt2x00dev->anchor);
++
++      retval = rt2x00lib_probe_dev(rt2x00dev);
++      if (retval)
++              goto exit_free_anchor;
++
+       return 0;
+ 
++exit_free_anchor:
++      usb_kill_anchored_urbs(rt2x00dev->anchor);
++
+ exit_free_reg:
+       rt2x00usb_free_reg(rt2x00dev);
+ 
+-- 
+2.12.1
+