linux/drivers/media
Minghsiu Tsai ba40be0fa2 [media] media: mtk-jpeg: fix continuous log "Context is NULL"
The symptom is continuous log "mtk-jpeg 18004000.jpegdec: Context is NULL"
in kernel log. It is because the error handling in irq doesn't clear
interrupt.

The calling flow like as below when issue happen
mtk_jpeg_device_run()
mtk_jpeg_job_abort()
  v4l2_m2m_job_finish() -> m2m_dev->curr_ctx = NULL;
mtk_jpeg_dec_irq()
  v4l2_m2m_get_curr_priv()
     -> m2m_dev->curr_ctx == NULL
     -> return NULL
log "Context is NULL"

There is race condition between job_abort() and irq. In order to simplify
code, don't want to add extra flag to maintain state, empty job_abort() and
clear interrupt before v4l2_m2m_get_curr_priv() in irq.

Signed-off-by: Minghsiu Tsai <minghsiu.tsai@mediatek.com>
Acked-by: Rick Chang <rick.chang@mediatek.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
2017-04-05 15:08:26 -03:00
..
cec [media] cec: don't Feature Abort msgs from Unregistered 2017-03-22 11:15:55 -03:00
common [media] tveeprom: get rid of unused arg on tveeprom_hauppauge_analog() 2017-03-03 07:35:02 -03:00
dvb-core sched/headers: Prepare to move signal wakeup & sigpending methods from <linux/sched.h> into <linux/sched/signal.h> 2017-03-02 08:42:32 +01:00
dvb-frontends Linux 4.11-rc5 2017-04-04 11:11:43 -03:00
firewire
i2c [media] media: i2c: soc_camera: constify v4l2_subdev_* structures 2017-03-23 14:43:49 -03:00
mmc
pci [media] solo6x10: release vb2 buffers in solo_stop_streaming() 2017-03-22 11:57:31 -03:00
platform [media] media: mtk-jpeg: fix continuous log "Context is NULL" 2017-04-05 15:08:26 -03:00
radio [media] si4713: Add OF device ID table 2017-03-22 11:23:58 -03:00
rc [media] rc: promote lirc_sir out of staging 2017-04-05 14:50:57 -03:00
spi [media] gs1662: drop kfree for memory allocated with devm_kzalloc 2016-10-24 17:59:08 -02:00
tuners Linux 4.11-rc1 2017-03-06 06:49:34 -03:00
usb [media] gspca: konica: add missing endpoint sanity check 2017-04-05 15:07:31 -03:00
v4l2-core [media] v4l: Allow calling v4l2_device_register_subdev_nodes() multiple times 2017-03-22 11:21:43 -03:00
cec-edid.c
Kconfig [media] Kconfig: fix breakages when DVB_CORE is not selected 2016-11-18 17:59:17 -02:00
Makefile [media] cec: move the CEC framework out of staging and to media 2016-11-16 15:40:20 -02:00
media-device.c [media] media: Rename graph and pipeline structs and functions 2017-01-27 16:13:24 -02:00
media-devnode.c [media] media: Drop FSF's postal address from the source code files 2017-01-27 11:38:09 -02:00
media-entity.c [media] media: entity: Add debug information to graph walk 2017-01-30 11:33:26 -02:00