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The current version of rtlwifi for USB operations uses kmalloc to acquire a 32-bit buffer for each read of the device. When _usb_read_sync() is called with the rcu_lock held, the result is a "sleeping function called from invalid context" BUG. This is reported for two cases in https://bugzilla.kernel.org/show_bug.cgi?id=42775. The first case has the lock originating from within rtlwifi and could be fixed by rearranging the locking; however, the second originates from within mac80211. The kmalloc() call is removed from _usb_read_sync() by creating a ring buffer pointer in the private area and allocating the buffer data in the probe routine. Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net> Cc: Stable <stable@vger.kernel.org> [This version good for 3.3+ - different patch for 3.2 - 2.6.39] Signed-off-by: John W. Linville <linville@tuxdriver.com> |
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| .. | ||
| rtl8192c | ||
| rtl8192ce | ||
| rtl8192cu | ||
| rtl8192de | ||
| rtl8192se | ||
| base.c | ||
| base.h | ||
| cam.c | ||
| cam.h | ||
| core.c | ||
| core.h | ||
| debug.c | ||
| debug.h | ||
| efuse.c | ||
| efuse.h | ||
| Kconfig | ||
| Makefile | ||
| pci.c | ||
| pci.h | ||
| ps.c | ||
| ps.h | ||
| rc.c | ||
| rc.h | ||
| regd.c | ||
| regd.h | ||
| usb.c | ||
| usb.h | ||
| wifi.h | ||