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853a9ae29e
The 8250 handle_irq callback is not just called from the interrupt
handler but also from a timer callback when polling (e.g. for ports
without an interrupt line). Consequently the callback must explicitly
disable interrupts to avoid a potential deadlock with another interrupt
in polled mode.
Add back an irqrestore-version of the sysrq port-unlock helper and use
it in the 8250 callbacks that need it.
Fixes:
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.. | ||
8250.h | ||
8250_accent.c | ||
8250_acorn.c | ||
8250_aspeed_vuart.c | ||
8250_bcm2835aux.c | ||
8250_bcm7271.c | ||
8250_boca.c | ||
8250_core.c | ||
8250_dma.c | ||
8250_dw.c | ||
8250_dwlib.c | ||
8250_dwlib.h | ||
8250_early.c | ||
8250_em.c | ||
8250_exar.c | ||
8250_exar_st16c554.c | ||
8250_fintek.c | ||
8250_fourport.c | ||
8250_fsl.c | ||
8250_gsc.c | ||
8250_hp300.c | ||
8250_hub6.c | ||
8250_ingenic.c | ||
8250_ioc3.c | ||
8250_lpc18xx.c | ||
8250_lpss.c | ||
8250_men_mcb.c | ||
8250_mid.c | ||
8250_mtk.c | ||
8250_of.c | ||
8250_omap.c | ||
8250_pci.c | ||
8250_pnp.c | ||
8250_port.c | ||
8250_pxa.c | ||
8250_tegra.c | ||
8250_uniphier.c | ||
Kconfig | ||
Makefile | ||
serial_cs.c |