diff options
| author | Andy Shevchenko <andriy.shevchenko@linux.intel.com> | 2026-01-28 17:27:26 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2026-03-12 17:05:25 +0300 |
| commit | 7885af04df6e4efd72910200c1bfc079d61202e4 (patch) | |
| tree | af0af59a4fb94cc863cfa5d23b3065c0a65704e8 | |
| parent | 43c2b86ff633c34831c8430925ba73d7c20da1ad (diff) | |
| download | linux-7885af04df6e4efd72910200c1bfc079d61202e4.tar.xz | |
serial: 8250_port: Drop duplicate NULL check
serial8250_release_dma() is NULL-aware, no need to check this in the caller.
While at it, make sure DMA won't be used again, by NULLifying the pointer.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Link: https://patch.msgid.link/20260128142726.128175-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/tty/serial/8250/8250_port.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/tty/serial/8250/8250_port.c b/drivers/tty/serial/8250/8250_port.c index cc94af2d578a..c05a6df8d6b4 100644 --- a/drivers/tty/serial/8250/8250_port.c +++ b/drivers/tty/serial/8250/8250_port.c @@ -2364,8 +2364,8 @@ void serial8250_do_shutdown(struct uart_port *port) synchronize_irq(port->irq); - if (up->dma) - serial8250_release_dma(up); + serial8250_release_dma(up); + up->dma = NULL; scoped_guard(uart_port_lock_irqsave, port) { if (port->flags & UPF_FOURPORT) { |