Messages in this thread | | | Date | Wed, 27 Mar 2024 09:53:45 +0100 | Subject | Re: [PATCH] drm/ast: Fix soft lockup | From | Jocelyn Falempe <> |
| |
Hi,
Thanks for your patch. I'm wondering how you can trigger this infinite loop ?
Also this looks like a simple fix, that can be easily backported, so I'm adding stable in Cc.
If Thomas has no objections, I can push it to drm-misc-fixes.
Reviewed-by: Jocelyn Falempe <jfalempe@redhat.com>
--
Jocelyn
On 25/03/2024 04:35, Jammy Huang wrote: > Avoid infinite-loop in ast_dp_set_on_off(). > > Signed-off-by: Jammy Huang <jammy_huang@aspeedtech.com> > --- > drivers/gpu/drm/ast/ast_dp.c | 3 +++ > 1 file changed, 3 insertions(+) > > diff --git a/drivers/gpu/drm/ast/ast_dp.c b/drivers/gpu/drm/ast/ast_dp.c > index ebb6d8ebd44e..1e9259416980 100644 > --- a/drivers/gpu/drm/ast/ast_dp.c > +++ b/drivers/gpu/drm/ast/ast_dp.c > @@ -180,6 +180,7 @@ void ast_dp_set_on_off(struct drm_device *dev, bool on) > { > struct ast_device *ast = to_ast_device(dev); > u8 video_on_off = on; > + u32 i = 0; > > // Video On/Off > ast_set_index_reg_mask(ast, AST_IO_VGACRI, 0xE3, (u8) ~AST_DP_VIDEO_ENABLE, on); > @@ -192,6 +193,8 @@ void ast_dp_set_on_off(struct drm_device *dev, bool on) > ASTDP_MIRROR_VIDEO_ENABLE) != video_on_off) { > // wait 1 ms > mdelay(1); > + if (++i > 200) > + break; > } > } > } > > base-commit: b0546776ad3f332e215cebc0b063ba4351971cca
| |