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omap8250_restore_regs() accesses UART_IER. This register is modified twice by each console write (serial8250_console_write()) under the port lock. However, not all calls to omap8250_restore_regs() are under the port lock. Add the missing port locking around omap8250_restore_regs() calls. Add lockdep notation to the omap8250_restore_regs(). Note that this is not fixing a real problem because the serial devices are resumed before console printing is enabled. However, adding this locking allows for clean locking semantics for omap8250_restore_regs() so that lockdep can be used to identify possible problems in the future. It also simplifies synchronization of UART_IER in general by not needing to rely on such implementation details. Signed-off-by: John Ogness <john.ogness@linutronix.de> Link: https://lore.kernel.org/r/20230525093159.223817-7-john.ogness@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
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| .. | ||
| hvc | ||
| ipwireless | ||
| serdev | ||
| serial | ||
| vt | ||
| amiserial.c | ||
| ehv_bytechan.c | ||
| goldfish.c | ||
| Kconfig | ||
| Makefile | ||
| mips_ejtag_fdc.c | ||
| moxa.c | ||
| mxser.c | ||
| n_gsm.c | ||
| n_hdlc.c | ||
| n_null.c | ||
| n_tty.c | ||
| nozomi.c | ||
| pty.c | ||
| rpmsg_tty.c | ||
| synclink_gt.c | ||
| sysrq.c | ||
| tty_audit.c | ||
| tty_baudrate.c | ||
| tty_buffer.c | ||
| tty_io.c | ||
| tty_ioctl.c | ||
| tty_jobctrl.c | ||
| tty_ldisc.c | ||
| tty_ldsem.c | ||
| tty_mutex.c | ||
| tty_port.c | ||
| tty.h | ||
| ttynull.c | ||
| vcc.c | ||