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[media] davinci: vpif: capture/display: fix race condition

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channel_first_int[][] variable is used as a flag for the ISR,
This flag was being set after enabling the interrupts, There
where situations when the isr occurred even before the flag was set
dues to which it was causing the application hang.
This patch sets  channel_first_int[][] flag just before enabling the
interrupt.

Reported-by: David Oleszkiewicz <doleszki@adsyscontrols.com>
Signed-off-by: Lad, Prabhakar <prabhakar.lad@ti.com>
Signed-off-by: Manjunath Hadli <manjunath.hadli@ti.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Lad, Prabhakar 2012-09-14 10:22:24 -03:00 committed by Mauro Carvalho Chehab
parent 080fb42b2b
commit 9e18404ada
2 changed files with 2 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/media/platform/davinci/vpif_capture.c
View File

@ -339,6 +339,7 @@ static int vpif_start_streaming(struct vb2_queue *vq, unsigned int count)
* Set interrupt for both the fields in VPIF Register enable channel in
* VPIF register
*/
channel_first_int[VPIF_VIDEO_INDEX][ch->channel_id] = 1;
if ((VPIF_CHANNEL0_VIDEO == ch->channel_id)) {
channel0_intr_assert();
channel0_intr_enable(1);
@ -350,7 +351,6 @@ static int vpif_start_streaming(struct vb2_queue *vq, unsigned int count)
channel1_intr_enable(1);
enable_channel1(1);
}
channel_first_int[VPIF_VIDEO_INDEX][ch->channel_id] = 1;
return 0;
}

2
drivers/media/platform/davinci/vpif_display.c
View File

@ -302,6 +302,7 @@ static int vpif_start_streaming(struct vb2_queue *vq, unsigned int count)
/* Set interrupt for both the fields in VPIF
Register enable channel in VPIF register */
channel_first_int[VPIF_VIDEO_INDEX][ch->channel_id] = 1;
if (VPIF_CHANNEL2_VIDEO == ch->channel_id) {
channel2_intr_assert();
channel2_intr_enable(1);
@ -318,7 +319,6 @@ static int vpif_start_streaming(struct vb2_queue *vq, unsigned int count)
if (vpif_config_data->ch3_clip_en)
channel3_clipping_enable(1);
}
channel_first_int[VPIF_VIDEO_INDEX][ch->channel_id] = 1;
return 0;
}