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| author | Hans Verkuil <hans.verkuil@cisco.com> | 2014-12-13 08:52:53 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@osg.samsung.com> | 2014-12-23 10:40:59 -0200 |
| commit | d832672f2038d7b36dc08636468cbbed4afe625b (patch) | |
| tree | 41983c164d0f7f027988b97e7a165689552367de /drivers/media/pci/ivtv | |
| parent | 65adb86d6142f1233e84c81112907f4caa6afffd (diff) | |
| download | linux-d832672f2038d7b36dc08636468cbbed4afe625b.tar.gz linux-d832672f2038d7b36dc08636468cbbed4afe625b.tar.bz2 linux-d832672f2038d7b36dc08636468cbbed4afe625b.zip | |
[media] ivtv: fix sparse warning
Fix this warning:
drivers/media/pci/ivtv/ivtv-irq.c:418:9: warning: context imbalance in 'ivtv_dma_stream_dec_prepare' - different lock contexts for basic block
sparse didn't quite understand the locking scheme, so rewrite it to keep
sparse happy.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Cc: Andy Walls <awalls@md.metrocast.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Diffstat (limited to 'drivers/media/pci/ivtv')
| -rw-r--r-- | drivers/media/pci/ivtv/ivtv-irq.c | 22 |
1 files changed, 13 insertions, 9 deletions
diff --git a/drivers/media/pci/ivtv/ivtv-irq.c b/drivers/media/pci/ivtv/ivtv-irq.c index ab6d5d25aa6f..e7d701777e53 100644 --- a/drivers/media/pci/ivtv/ivtv-irq.c +++ b/drivers/media/pci/ivtv/ivtv-irq.c @@ -357,7 +357,6 @@ void ivtv_dma_stream_dec_prepare(struct ivtv_stream *s, u32 offset, int lock) u32 uv_offset = offset + IVTV_YUV_BUFFER_UV_OFFSET; int y_done = 0; int bytes_written = 0; - unsigned long flags = 0; int idx = 0; IVTV_DEBUG_HI_DMA("DEC PREPARE DMA %s: %08x %08x\n", s->name, s->q_predma.bytesused, offset); @@ -407,16 +406,21 @@ void ivtv_dma_stream_dec_prepare(struct ivtv_stream *s, u32 offset, int lock) /* Sync Hardware SG List of buffers */ ivtv_stream_sync_for_device(s); - if (lock) + if (lock) { + unsigned long flags = 0; + spin_lock_irqsave(&itv->dma_reg_lock, flags); - if (!test_bit(IVTV_F_I_DMA, &itv->i_flags)) { - ivtv_dma_dec_start(s); - } - else { - set_bit(IVTV_F_S_DMA_PENDING, &s->s_flags); - } - if (lock) + if (!test_bit(IVTV_F_I_DMA, &itv->i_flags)) + ivtv_dma_dec_start(s); + else + set_bit(IVTV_F_S_DMA_PENDING, &s->s_flags); spin_unlock_irqrestore(&itv->dma_reg_lock, flags); + } else { + if (!test_bit(IVTV_F_I_DMA, &itv->i_flags)) + ivtv_dma_dec_start(s); + else + set_bit(IVTV_F_S_DMA_PENDING, &s->s_flags); + } } static void ivtv_dma_enc_start_xfer(struct ivtv_stream *s) |