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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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b6d1778bc5
During system reboot, the sh-dma-engine device may be runtime-suspended,
causing a crash:
Unhandled fault: imprecise external abort (0x1406) at 0x0002c02c
Internal error: : 1406 [#1] SMP ARM
...
PC is at sh_dmae_ctl_stop+0x28/0x64
LR is at sh_dmae_ctl_stop+0x24/0x64
If the sh-dma-engine is runtime-suspended, its module clock is turned
off, and its registers cannot be accessed.
To fix this, move the call to sh_dmae_ctl_stop(), which touches the
DMAOR register, to the sh_dmae_suspend() and sh_dmae_runtime_suspend()
callbacks. This makes PM operations more symmetric, as both
sh_dmae_resume() and sh_dmae_runtime_resume() already call sh_dmae_rst()
to re-initialize the DMAOR register.
Remove sh_dmae_shutdown(), as it became empty.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
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| .. | ||
| Kconfig | ||
| Makefile | ||
| rcar-audmapp.c | ||
| rcar-dmac.c | ||
| rcar-hpbdma.c | ||
| shdma-arm.h | ||
| shdma-base.c | ||
| shdma-of.c | ||
| shdma-r8a73a4.c | ||
| shdma.h | ||
| shdmac.c | ||
| sudmac.c | ||