diff options
| author | Tony Lindgren <tony@atomide.com> | 2023-08-04 16:15:51 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-08-04 17:14:38 +0200 |
| commit | dfe2aeb226fd5e19b0ee795f4f6ed8bc494c1534 (patch) | |
| tree | cfc3d37c0e8dcb90ba7e0bf9f04ad488fe148541 /include/linux/ras.h | |
| parent | bbb4abb1bcfb5c25bc022ccecfea919286093b5d (diff) | |
serial: 8250: Fix oops for port->pm on uart_change_pm()
Unloading a hardware specific 8250 driver can produce error "Unable to
handle kernel paging request at virtual address" about ten seconds after
unloading the driver. This happens on uart_hangup() calling
uart_change_pm().
Turns out commit 04e82793f068 ("serial: 8250: Reinit port->pm on port
specific driver unbind") was only a partial fix. If the hardware specific
driver has initialized port->pm function, we need to clear port->pm too.
Just reinitializing port->ops does not do this. Otherwise serial8250_pm()
will call port->pm() instead of serial8250_do_pm().
Fixes: 04e82793f068 ("serial: 8250: Reinit port->pm on port specific driver unbind")
Signed-off-by: Tony Lindgren <tony@atomide.com>
Link: https://lore.kernel.org/r/20230804131553.52927-1-tony@atomide.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/linux/ras.h')
0 files changed, 0 insertions, 0 deletions