mirror of https://gitee.com/openkylin/linux.git
15b82b46de
In a few places, sdio_uart_irq() is called directly instead of waiting for the actual interrupt to be raised and the SDIO IRQ thread scheduled in order to reduce latency. However, some interaction with the tty core may end up calling us back (serial echo, flow control, etc.) creating two issues: - the host lock gets claimed twice from the same thread causing a deadlock; - the same direct calls to sdio_uart_irq() may be performed causing unexpected reentrancy into the IRQ handler. This patch handles both of those issues. Signed-off-by: Nicolas Pitre <npitre@mvista.com> Signed-off-by: Pierre Ossman <drzeus@drzeus.cx> |
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