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| author | Finn Thain <fthain@telegraphics.com.au> | 2020-05-31 09:12:13 +1000 |
|---|---|---|
| committer | Geert Uytterhoeven <geert@linux-m68k.org> | 2020-07-13 11:39:13 +0200 |
| commit | aeb445bf2194d83e12e85bf5c65baaf1f093bd8f (patch) | |
| tree | d74b3c152f2cf88c6c9275da2e885e5f3c077dc6 /drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c | |
| parent | be1a31283655105606407502800871b9c1a1132f (diff) | |
m68k: mac: Don't send IOP message until channel is idle
In the following sequence of calls, iop_do_send() gets called when the
"send" channel is not in the IOP_MSG_IDLE state:
iop_ism_irq()
iop_handle_send()
(msg->handler)()
iop_send_message()
iop_do_send()
Avoid this by testing the channel state before calling iop_do_send().
When sending, and iop_send_queue is empty, call iop_do_send() because
the channel is idle. If iop_send_queue is not empty, iop_do_send() will
get called later by iop_handle_send().
Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Tested-by: Stan Johnson <userm57@yahoo.com>
Cc: Joshua Thompson <funaho@jurai.org>
Link: https://lore.kernel.org/r/6d667c39e53865661fa5a48f16829d18ed8abe54.1590880333.git.fthain@telegraphics.com.au
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c')
0 files changed, 0 insertions, 0 deletions