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e8684c8877
ali_ircc_sir_change_speed() is always called with self->lock held,
so acquiring the lock inside it leads to unavoidable deadlock.
Call graph:
ali_ircc_sir_change_speed() is called from ali_ircc_change_speed()
ali_ircc_fir_hard_xmit() under spin_lock_irqsave(&self->lock, flags);
ali_ircc_sir_hard_xmit() under spin_lock_irqsave(&self->lock, flags);
ali_ircc_net_ioctl() under spin_lock_irqsave(&self->lock, flags);
ali_ircc_dma_xmit_complete()
ali_ircc_fir_interrupt()
ali_ircc_interrupt() under spin_lock(&self->lock);
ali_ircc_sir_write_wakeup()
ali_ircc_sir_interrupt()
ali_ircc_interrupt() under spin_lock(&self->lock);
The patch removes spin_lock/unlock from ali_ircc_sir_change_speed().
Found by Linux Driver Verification project (linuxtesting.org).
Signed-off-by: Alexey Khoroshilov <khoroshilov@ispras.ru>
Signed-off-by: David S. Miller <davem@davemloft.net>
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|---|---|---|
| .. | ||
| act200l-sir.c | ||
| actisys-sir.c | ||
| ali-ircc.c | ||
| ali-ircc.h | ||
| au1k_ir.c | ||
| bfin_sir.c | ||
| bfin_sir.h | ||
| donauboe.c | ||
| donauboe.h | ||
| esi-sir.c | ||
| girbil-sir.c | ||
| irda-usb.c | ||
| irda-usb.h | ||
| irtty-sir.c | ||
| irtty-sir.h | ||
| Kconfig | ||
| kingsun-sir.c | ||
| ks959-sir.c | ||
| ksdazzle-sir.c | ||
| litelink-sir.c | ||
| ma600-sir.c | ||
| Makefile | ||
| mcp2120-sir.c | ||
| mcs7780.c | ||
| mcs7780.h | ||
| nsc-ircc.c | ||
| nsc-ircc.h | ||
| old_belkin-sir.c | ||
| pxaficp_ir.c | ||
| sa1100_ir.c | ||
| sh_irda.c | ||
| sh_sir.c | ||
| sir-dev.h | ||
| sir_dev.c | ||
| sir_dongle.c | ||
| smsc-ircc2.c | ||
| smsc-ircc2.h | ||
| smsc-sio.h | ||
| stir4200.c | ||
| tekram-sir.c | ||
| toim3232-sir.c | ||
| via-ircc.c | ||
| via-ircc.h | ||
| vlsi_ir.c | ||
| vlsi_ir.h | ||
| w83977af.h | ||
| w83977af_ir.c | ||
| w83977af_ir.h | ||