f0bfcc22d9
When the adv7511 i2c client doesn't have an interrupt line, we observe a
deadlock on caused by trying to lock drm device's mode_config.mutex twice
in the same context.
Here is the sequence that causes it:
ioctl DRM_IOCTL_MODE_GETCONNECTOR from userspace
drm_mode_getconnector (acquires mode_config mutex)
connector->fill_modes()
drm_helper_probe_single_connector_modes
connector_funcs->get_modes
adv7511_encoder_get_modes
adv7511_get_edid_block
adv7511_irq_process
drm_helper_hpd_irq_event (acquires mode_config mutex again)
In adv7511_irq_process, don't call drm_helper_hpd_irq_event when not
called from the interrupt handler. It doesn't serve any purpose there
anyway.
Signed-off-by: Archit Taneja <architt@codeaurora.org>
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| .. | ||
| adv7511 | ||
| analogix | ||
| Kconfig | ||
| Makefile | ||
| analogix-anx78xx.c | ||
| analogix-anx78xx.h | ||
| dw-hdmi-ahb-audio.c | ||
| dw-hdmi-audio.h | ||
| dw-hdmi.c | ||
| dw-hdmi.h | ||
| nxp-ptn3460.c | ||
| parade-ps8622.c | ||
| sii902x.c | ||