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| author | Mark Brown | 2009-04-14 12:06:49 +0200 |
|---|---|---|
| committer | Russell King | 2009-04-15 11:01:02 +0200 |
| commit | 41609ff43005de11dadfb0ccadb344f0e2966829 (patch) | |
| tree | a84bf697eb3f1d2535c9f243e71308caa53939e6 /arch/arm/include/asm/tlb.h | |
| parent | Merge branch 'fix' of git://git.kernel.org/pub/scm/linux/kernel/git/ycmiao/px... (diff) | |
| download | kernel-qcow2-linux-41609ff43005de11dadfb0ccadb344f0e2966829.tar.gz kernel-qcow2-linux-41609ff43005de11dadfb0ccadb344f0e2966829.tar.xz kernel-qcow2-linux-41609ff43005de11dadfb0ccadb344f0e2966829.zip | |
[ARM] 5449/1: S3C: Use disable_irq_nosync() to fix boot lockups
With 2.6.30-rc1 on SMDK6410 I experience a soft lockup on bootup when
the Samsung serial driver attempts to disable the transmit interrupt
from within the transmit interrupt handler: it calls disable_irq()
which locks up due to attempting to synchronise with the running handler.
Fix this by using disable_irq_nosync().
Also make the same change in the recieve path.
Backtrace:
[<c002a914>] (__irq_svc+0x34/0x80) from [<c00696c0>] (synchr)
[<c00696c0>] (synchronize_irq+0xc/0xcc) from [<c018d434>] (s)
[<c018d434>] (s3c24xx_serial_stop_tx+0x1c/0x3c) from [<c018d)
[<c018d54c>] (s3c24xx_serial_tx_chars+0xf8/0x104) from [<c00)
[<c0068bcc>] (handle_IRQ_event+0x74/0x118) from [<c006ab04>])
[<c006ab04>] (handle_level_irq+0x100/0x118) from [<c00349c4>)
[<c00349c4>] (s3c_irq_demux_uart+0x94/0xc4) from [<c002a050>)
[<c002a050>] (_text+0x50/0x6c) from [<c002a914>] (__irq_svc+)
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/include/asm/tlb.h')
0 files changed, 0 insertions, 0 deletions