| commit | e41c0981213f39ecd421d8c1f7334cf04c2122e3 | |
| author | Sebastian Andrzej Siewior <bigeasy@linutronix.de> | |
| Wed, 4 Dec 2013 19:52:49 +0000 (4 20:52 +0100) | ||
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | |
| Mon, 9 Dec 2013 01:16:05 +0000 (8 17:16 -0800) | ||
| tree | c29c189f59e04cd6ca0d2c5a9df8c5554c1287ec | treesnapshot (tar.gz zip) |
| parent | 0da3336f19f2a42e9153efa4112d50fd148a8e61 | commitdiff |
tty: serial: pch: don't crash if DMA enabled but not loaded
if the DMA driver isn't loaded "on time" then we crash in the irq handler:
| pch_uart 0000:02:0a.4: pch_request_dma:dma_request_channel FAILS(Tx)
| BUG: unable to handle kernel NULL pointer dereference at (null)
| IP: [<c0676ed9>] pch_uart_interrupt+0x739/0x940
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
if the DMA driver isn't loaded "on time" then we crash in the irq handler:
| pch_uart 0000:02:0a.4: pch_request_dma:dma_request_channel FAILS(Tx)
| BUG: unable to handle kernel NULL pointer dereference at (null)
| IP: [<c0676ed9>] pch_uart_interrupt+0x739/0x940
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| drivers/tty/serial/pch_uart.c | diffblobblamehistory |