| Message ID | 1375305478-26754-1-git-send-email-peter@hurleysoftware.com (mailing list archive) |
|---|---|
| State | New, archived |
| Delegated to: | Jiri Kosina |
| Headers | show |
On Wed, 31 Jul 2013, Peter Hurley wrote: > The ll_driver's .hidinput_input_event() method is called from > atomic context [1]. Use GFP_ATOMIC for allocation of the > synthesized hid report. > > Signed-off-by: Peter Hurley <peter@hurleysoftware.com> Applied, thanks Peter.
diff --git a/drivers/hid/hid-logitech-dj.c b/drivers/hid/hid-logitech-dj.c index 510fa8f..e7ad88e 100644 --- a/drivers/hid/hid-logitech-dj.c +++ b/drivers/hid/hid-logitech-dj.c @@ -591,7 +591,7 @@ static int logi_dj_ll_input_event(struct input_dev *dev, unsigned int type, } hid_set_field(field, offset, value); - data = hid_alloc_report_buf(field->report, GFP_KERNEL); + data = hid_alloc_report_buf(field->report, GFP_ATOMIC); if (!data) { dev_warn(&dev->dev, "failed to allocate report buf memory\n"); return -1;
The ll_driver's .hidinput_input_event() method is called from atomic context [1]. Use GFP_ATOMIC for allocation of the synthesized hid report. Signed-off-by: Peter Hurley <peter@hurleysoftware.com> [1] BUG: sleeping function called from invalid context at /home/peter/src/kernels/next/mm/slub.c:941 in_atomic(): 1, irqs_disabled(): 1, pid: 2095, name: Xorg INFO: lockdep is turned off. irq event stamp: 1502178 hardirqs last enabled at (1502177): [<ffffffff81785e55>] _raw_spin_unlock_irqrestore+0x65/0x80 hardirqs last disabled at (1502178): [<ffffffff8178632a>] common_interrupt+0x6a/0x6f softirqs last enabled at (1501802): [<ffffffff81051ed3>] __do_softirq+0x183/0x420 softirqs last disabled at (1501799): [<ffffffff81052315>] irq_exit+0xb5/0xc0 CPU: 3 PID: 2095 Comm: Xorg Not tainted 3.11-next-20130725-xeon+lockdep #20130725 Hardware name: Dell Inc. Precision WorkStation T5400 /0RW203, BIOS A11 04/30/2012 ffffffff81a662e0 ffff8802adcf9ca8 ffffffff8177c330 0000000000000000 ffff8802a76d2440 ffff8802adcf9cd8 ffffffff810867d0 ffff8802a7ac8000 0000000000000010 00000000ffffffff 00000000000000d0 ffff8802adcf9d38 Call Trace: [<ffffffff8177c330>] dump_stack+0x4f/0x84 [<ffffffff810867d0>] __might_sleep+0x140/0x1f0 [<ffffffff811ad93b>] __kmalloc+0x6b/0x2e0 [<ffffffffa026cb08>] ? hid_alloc_report_buf+0x28/0x30 [hid] [<ffffffffa026cb08>] hid_alloc_report_buf+0x28/0x30 [hid] [<ffffffffa00700b0>] logi_dj_ll_input_event+0xb0/0x1b0 [hid_logitech_dj] [<ffffffff815a559e>] input_handle_event+0x8e/0x540 [<ffffffff815a5aad>] ? input_inject_event+0x5d/0x220 [<ffffffff815a5c10>] input_inject_event+0x1c0/0x220 [<ffffffff815a5a94>] ? input_inject_event+0x44/0x220 [<ffffffff81181660>] ? might_fault+0xa0/0xb0 [<ffffffff81181617>] ? might_fault+0x57/0xb0 [<ffffffff815a909e>] evdev_write+0xde/0x160 [<ffffffff811c0ad8>] vfs_write+0xc8/0x1f0 [<ffffffff811c0fe5>] SyS_write+0x55/0xa0 [<ffffffff8178e682>] system_call_fastpath+0x16/0x1b --- drivers/hid/hid-logitech-dj.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)