linux/drivers/staging, branch v3.18

staging: r8188eu: Add new device ID for DLink GO-USB-N150

2014-11-27T16:55:01Z

The DLink GO-USB-N150 with revision B1 uses this driver. Signed-off-by: Larry Finger Cc: stable Signed-off-by: Greg Kroah-Hartman

staging: r8188eu: Fix scheduling while atomic error introduced in commit fadbe0cd

2014-11-26T22:03:48Z

In commit fadbe0cd5292851608e2e01b91d9295fa287b9fe entitled "staging: rtl8188eu:Remove rtw_zmalloc(), wrapper for kzalloc()", the author failed to note that the original code in the wrapper tested whether the caller could sleep, and set the flags argument to kzalloc() appropriately. After the patch, GFP_KERNEL is used unconditionally. Unfortunately, several of the routines may be entered from an interrupt routine and generate a BUG splat for every such call. Routine rtw_sitesurvey_cmd() is used in the example below: BUG: sleeping function called from invalid context at mm/slub.c:1240 in_atomic(): 1, irqs_disabled(): 0, pid: 756, name: wpa_supplicant INFO: lockdep is turned off. CPU: 2 PID: 756 Comm: wpa_supplicant Tainted: G WC O 3.18.0-rc4+ #34 Hardware name: TOSHIBA TECRA A50-A/TECRA A50-A, BIOS Version 4.20 04/17/2014 ffffc90005557000 ffff880216fafaa8 ffffffff816b0bbf 0000000000000000 ffff8800c3b58000 ffff880216fafac8 ffffffff8107af77 0000000000000001 0000000000000010 ffff880216fafb18 ffffffff811b06ce 0000000000000000 Call Trace: [] dump_stack+0x4e/0x71 [] __might_sleep+0xf7/0x120 [] kmem_cache_alloc_trace+0x4e/0x1f0 [] ? rtw_sitesurvey_cmd+0x56/0x2a0 [r8188eu] [] rtw_sitesurvey_cmd+0x56/0x2a0 [r8188eu] [] rtw_do_join+0x22d/0x370 [r8188eu] [] rtw_set_802_11_ssid+0x218/0x3d0 [r8188eu] [] rtw_wx_set_essid+0x1e5/0x410 [r8188eu] [] ? rtw_wx_get_rate+0x50/0x50 [r8188eu] [] ioctl_standard_iw_point+0x151/0x3f0 [] ioctl_standard_call+0xb2/0xe0 [] ? rtnl_lock+0x17/0x20 [] ? iw_handler_get_private+0x70/0x70 [] ? call_commit_handler+0x40/0x40 [] wireless_process_ioctl+0x176/0x1c0 [] wext_handle_ioctl+0x69/0xc0 [] dev_ioctl+0x309/0x5e0 [] ? call_rcu+0x17/0x20 [] sock_ioctl+0x142/0x2e0 [] do_vfs_ioctl+0x300/0x520 [] ? __audit_syscall_entry+0xb4/0x110 [] ? __audit_syscall_entry+0xb4/0x110 [] ? do_audit_syscall_entry+0x6c/0x70 [] SyS_ioctl+0x81/0xa0 [] system_call_fastpath+0x12/0x17 Additional routines that generate this BUG are rtw_joinbss_cmd(), rtw_dynamic_chk_wk_cmd(), rtw_lps_ctrl_wk_cmd(), rtw_rpt_timer_cfg_cmd(), rtw_ps_cmd(), report_survey_event(), report_join_res(), survey_timer_hdl(), and rtw_check_bcn_info(). Signed-off-by: Larry Finger Cc: navin patidar Signed-off-by: Greg Kroah-Hartman

Merge tag 'iio-fixes-for-3.18b' of git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio into staging-linus

2014-11-05T19:30:45Z

Jonathan writes: Second round of IIO fixes for the 3.18 cycle. * tsl4531 - fix a compile error when CONFIG_PM_OPS not set. * kxcjk-1013 - event spec direction was invalid - leading to 'interesting' attrribute names. * as3935 - sizeof(st) used instead of sizeof(*st) leading to allocation of space for a pointer rather than the structure desired. * ade7758 - Another null pointer deref fix due to different channels being provided to the the buffer register than used for the sysfs side of things. * ade7758 - Check there is a channel enabled in preenable for the buffer before doing anything. * ade7758 - Drop a stray raw from the channel name that leads to _raw_raw postfix.

staging:iio:ade7758: Remove "raw" from channel name

2014-11-05T18:33:48Z

"raw" is a property of a channel, but should not be part of the name of channel. Signed-off-by: Lars-Peter Clausen Cc: Signed-off-by: Jonathan Cameron

staging:iio:ade7758: Fix check if channels are enabled in prenable

2014-11-05T18:33:47Z

We should check if a channel is enabled, not if no channels are enabled. Fixes: 550268ca1111 ("staging:iio: scrap scan_count and ensure all drivers use active_scan_mask") Signed-off-by: Lars-Peter Clausen Cc: Signed-off-by: Jonathan Cameron

staging:iio:ade7758: Fix NULL pointer deref when enabling buffer

2014-11-05T18:33:47Z

In older versions of the IIO framework it was possible to pass a completely different set of channels to iio_buffer_register() as the one that is assigned to the IIO device. Commit 959d2952d124 ("staging:iio: make iio_sw_buffer_preenable much more general.") introduced a restriction that requires that the set of channels that is passed to iio_buffer_register() is a subset of the channels assigned to the IIO device as the IIO core will use the list of channels that is assigned to the device to lookup a channel by scan index in iio_compute_scan_bytes(). If it can not find the channel the function will crash. This patch fixes the issue by making sure that the same set of channels is assigned to the IIO device and passed to iio_buffer_register(). Note that we need to remove the IIO_CHAN_INFO_RAW and IIO_CHAN_INFO_SCALE info attributes from the channels since we don't actually want those to be registered. Fixes the following crash: Unable to handle kernel NULL pointer dereference at virtual address 00000016 pgd = d2094000 [00000016] *pgd=16e39831, *pte=00000000, *ppte=00000000 Internal error: Oops: 17 [#1] PREEMPT SMP ARM Modules linked in: CPU: 1 PID: 1695 Comm: bash Not tainted 3.17.0-06329-g29461ee #9686 task: d7768040 ti: d5bd4000 task.ti: d5bd4000 PC is at iio_compute_scan_bytes+0x38/0xc0 LR is at iio_compute_scan_bytes+0x34/0xc0 pc : [] lr : [] psr: 60070013 sp : d5bd5ec0 ip : 00000000 fp : 00000000 r10: d769f934 r9 : 00000000 r8 : 00000001 r7 : 00000000 r6 : c8fc6240 r5 : d769f800 r4 : 00000000 r3 : d769f800 r2 : 00000000 r1 : ffffffff r0 : 00000000 Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment user Control: 18c5387d Table: 1209404a DAC: 00000015 Process bash (pid: 1695, stack limit = 0xd5bd4240) Stack: (0xd5bd5ec0 to 0xd5bd6000) 5ec0: d769f800 d7435640 c8fc6240 d769f984 00000000 c03175a4 d7435690 d7435640 5ee0: d769f990 00000002 00000000 d769f800 d5bd4000 00000000 000b43a8 c03177f4 5f00: d769f810 0162b8c8 00000002 c8fc7e00 d77f1d08 d77f1da8 c8fc7e00 c01faf1c 5f20: 00000002 c010694c c010690c d5bd5f88 00000002 c8fc6840 c8fc684c c0105e08 5f40: 00000000 00000000 d20d1580 00000002 000af408 d5bd5f88 c000de84 c00b76d4 5f60: d20d1580 000af408 00000002 d20d1580 d20d1580 00000002 000af408 c000de84 5f80: 00000000 c00b7a44 00000000 00000000 00000002 b6ebea78 00000002 000af408 5fa0: 00000004 c000dd00 b6ebea78 00000002 00000001 000af408 00000002 00000000 5fc0: b6ebea78 00000002 000af408 00000004 bee96a4c 000a6094 00000000 000b43a8 5fe0: 00000000 bee969cc b6e2eb77 b6e6525c 40070010 00000001 00000000 00000000 [] (iio_compute_scan_bytes) from [] (__iio_update_buffers+0x248/0x438) [] (__iio_update_buffers) from [] (iio_buffer_store_enable+0x60/0x7c) [] (iio_buffer_store_enable) from [] (dev_attr_store+0x18/0x24) [] (dev_attr_store) from [] (sysfs_kf_write+0x40/0x4c) [] (sysfs_kf_write) from [] (kernfs_fop_write+0x110/0x154) [] (kernfs_fop_write) from [] (vfs_write+0xbc/0x170) [] (vfs_write) from [] (SyS_write+0x40/0x78) [] (SyS_write) from [] (ret_fast_syscall+0x0/0x30) Fixes: 959d2952d124 ("staging:iio: make iio_sw_buffer_preenable much more general.") Signed-off-by: Lars-Peter Clausen Cc: Signed-off-by: Jonathan Cameron

iio: adc: mxs-lradc: Disable the clock on probe failure

2014-11-05T18:33:44Z

We should disable lradc->clk in the case of errors in the probe function. Signed-off-by: Fabio Estevam Reviewed-by: Marek Vasut Signed-off-by: Jonathan Cameron Cc:

staging:iio:ad5933: Drop "raw" from channel names

2014-11-05T18:33:42Z

"raw" is the name of a channel property, but should not be part of the channel name itself. Signed-off-by: Lars-Peter Clausen Cc: Signed-off-by: Jonathan Cameron

staging:iio:ad5933: Fix NULL pointer deref when enabling buffer

2014-11-05T18:33:41Z

In older versions of the IIO framework it was possible to pass a completely different set of channels to iio_buffer_register() as the one that is assigned to the IIO device. Commit 959d2952d124 ("staging:iio: make iio_sw_buffer_preenable much more general.") introduced a restriction that requires that the set of channels that is passed to iio_buffer_register() is a subset of the channels assigned to the IIO device as the IIO core will use the list of channels that is assigned to the device to lookup a channel by scan index in iio_compute_scan_bytes(). If it can not find the channel the function will crash. This patch fixes the issue by making sure that the same set of channels is assigned to the IIO device and passed to iio_buffer_register(). Fixes the follow NULL pointer derefernce kernel crash: Unable to handle kernel NULL pointer dereference at virtual address 00000016 pgd = d53d0000 [00000016] *pgd=1534e831, *pte=00000000, *ppte=00000000 Internal error: Oops: 17 [#1] PREEMPT SMP ARM Modules linked in: CPU: 1 PID: 1626 Comm: bash Not tainted 3.15.0-19969-g2a180eb-dirty #9545 task: d6c124c0 ti: d539a000 task.ti: d539a000 PC is at iio_compute_scan_bytes+0x34/0xa8 LR is at iio_compute_scan_bytes+0x34/0xa8 pc : [] lr : [] psr: 60070013 sp : d539beb8 ip : 00000001 fp : 00000000 r10: 00000002 r9 : 00000000 r8 : 00000001 r7 : 00000000 r6 : d6dc8800 r5 : d7571000 r4 : 00000002 r3 : d7571000 r2 : 00000044 r1 : 00000001 r0 : 00000000 Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment user Control: 18c5387d Table: 153d004a DAC: 00000015 Process bash (pid: 1626, stack limit = 0xd539a240) Stack: (0xd539beb8 to 0xd539c000) bea0: c02fc0e4 d7571000 bec0: d76c1640 d6dc8800 d757117c 00000000 d757112c c0305b04 d76c1690 d76c1640 bee0: d7571188 00000002 00000000 d7571000 d539a000 00000000 000dd1c8 c0305d54 bf00: d7571010 0160b868 00000002 c69d3900 d7573278 d7573308 c69d3900 c01ece90 bf20: 00000002 c0103fac c0103f6c d539bf88 00000002 c69d3b00 c69d3b0c c0103468 bf40: 00000000 00000000 d7694a00 00000002 000af408 d539bf88 c000dd84 c00b2f94 bf60: d7694a00 000af408 00000002 d7694a00 d7694a00 00000002 000af408 c000dd84 bf80: 00000000 c00b32d0 00000000 00000000 00000002 b6f1aa78 00000002 000af408 bfa0: 00000004 c000dc00 b6f1aa78 00000002 00000001 000af408 00000002 00000000 bfc0: b6f1aa78 00000002 000af408 00000004 be806a4c 000a6094 00000000 000dd1c8 bfe0: 00000000 be8069cc b6e8ab77 b6ec125c 40070010 00000001 22940489 154a5007 [] (iio_compute_scan_bytes) from [] (__iio_update_buffers+0x248/0x438) [] (__iio_update_buffers) from [] (iio_buffer_store_enable+0x60/0x7c) [] (iio_buffer_store_enable) from [] (dev_attr_store+0x18/0x24) [] (dev_attr_store) from [] (sysfs_kf_write+0x40/0x4c) [] (sysfs_kf_write) from [] (kernfs_fop_write+0x110/0x154) [] (kernfs_fop_write) from [] (vfs_write+0xd0/0x160) [] (vfs_write) from [] (SyS_write+0x40/0x78) [] (SyS_write) from [] (ret_fast_syscall+0x0/0x30) Code: ea00000e e1a01008 e1a00005 ebfff6fc (e5d0a016) Fixes: 959d2952d124 ("staging:iio: make iio_sw_buffer_preenable much more general.") Signed-off-by: Lars-Peter Clausen Cc: Stable@vger.kernel.org Signed-off-by: Jonathan Cameron

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

2014-11-02T18:28:43Z

Pull VFS fixes from Al Viro: "A bunch of assorted fixes, most of them followups to overlayfs merge" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: ovl: initialize ->is_cursor Return short read or 0 at end of a raw device, not EIO isofs: don't bother with ->d_op for normal case isofs_cmp(): we'll never see a dentry for . or .. overlayfs: fix lockdep misannotation ovl: fix check for cursor overlayfs: barriers for opening upper-layer directory rcu: Provide counterpart to rcu_dereference() for non-RCU situations staging: android: logger: Fix log corruption regression