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firmware: ti_sci: Use system_state to determine polling
[ Upstream commit 9225bcd ] Commit b9e8a7d ("firmware: ti_sci: Switch transport to polled mode during system suspend") aims to resolve issues with tisci operations during system suspend operation. However, the system may enter a no_irq stage in various other usage modes, including power-off and restart. To determine if polling mode is appropriate, use the system_state instead. While at this, drop the unused is_suspending state variable and related helpers. Fixes: b9e8a7d ("firmware: ti_sci: Switch transport to polled mode during system suspend") Reported-by: Francesco Dolcini <francesco@dolcini.it> Reported-by: Wadim Egorov <w.egorov@phytec.de> Tested-by: Francesco Dolcini <francesco.dolcini@toradex.com> # Toradex Verdin AM62 Link: https://lore.kernel.org/r/20230620130329.4120443-1-nm@ti.com Closes: https://lore.kernel.org/all/ZGeHMjlnob2GFyHF@francesco-nb.int.toradex.com/ Signed-off-by: Nishanth Menon <nm@ti.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
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