From: Cousson, Benoit Date: Tue, 28 Feb 2012 17:22:12 +0000 (+0100) Subject: tty: serial: OMAP: Fix oops due to NULL pdata in DT boot X-Git-Tag: v3.4-rc1~185^2~98 X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=a5f43138da9beddc46b00ec31d167143a7176683;p=karo-tx-linux.git tty: serial: OMAP: Fix oops due to NULL pdata in DT boot The following commit: be4b0281956c5cae4f63f31f11d07625a6988766 (tty: serial: OMAP: block idle while the UART is transferring data in PIO mode), is introducing an oops if OMAP is booted using device tree blob because the pdata will not be initialized. Check if pdata is set before de-referencing it. Signed-off-by: Benoit Cousson Reviewed-by: Paul Walmsley Cc: stable Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/tty/serial/omap-serial.c b/drivers/tty/serial/omap-serial.c index f80904145fd4..0121486ac4fa 100644 --- a/drivers/tty/serial/omap-serial.c +++ b/drivers/tty/serial/omap-serial.c @@ -159,7 +159,7 @@ static void serial_omap_stop_tx(struct uart_port *port) serial_out(up, UART_IER, up->ier); } - if (!up->use_dma && pdata->set_forceidle) + if (!up->use_dma && pdata && pdata->set_forceidle) pdata->set_forceidle(up->pdev); pm_runtime_mark_last_busy(&up->pdev->dev); @@ -298,7 +298,7 @@ static void serial_omap_start_tx(struct uart_port *port) if (!up->use_dma) { pm_runtime_get_sync(&up->pdev->dev); serial_omap_enable_ier_thri(up); - if (pdata->set_noidle) + if (pdata && pdata->set_noidle) pdata->set_noidle(up->pdev); pm_runtime_mark_last_busy(&up->pdev->dev); pm_runtime_put_autosuspend(&up->pdev->dev); @@ -1613,7 +1613,7 @@ static int serial_omap_runtime_resume(struct device *dev) struct uart_omap_port *up = dev_get_drvdata(dev); struct omap_uart_port_info *pdata = dev->platform_data; - if (up) { + if (up && pdata) { if (pdata->get_context_loss_count) { u32 loss_cnt = pdata->get_context_loss_count(dev);