linux-kernel - [PATCH v2 2/2] serial: 8250_lpss: Switch to pcim_iomap() instead of pci_ioremap

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Message-Id: <20220215134359.78169-2-andriy.shevchenko@linux.intel.com>
Date:   Tue, 15 Feb 2022 15:43:59 +0200
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        linux-serial@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Jiri Slaby <jirislaby@...nel.org>
Subject: [PATCH v2 2/2] serial: 8250_lpss: Switch to pcim_iomap() instead of pci_ioremap_bar()

The pci_iounmap() doesn't cover all the cases where resource should
be unmapped. Instead of spreading it more, replace the pci_ioremap_bar()
with pcim_iomap() which uses managed resource approach.

Fixes: fecdef932b00 ("serial: 8250_lpss: enable DMA on Intel Quark UART")
Depends-on: ea5ab2e422de ("8250_lpss: check null return when calling pci_ioremap_bar")
Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
---
v2: new fix (by code inspection due to previous patch)
 drivers/tty/serial/8250/8250_lpss.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/drivers/tty/serial/8250/8250_lpss.c b/drivers/tty/serial/8250/8250_lpss.c
index 0f5af061e0b4..a9fc1d7d9c37 100644
--- a/drivers/tty/serial/8250/8250_lpss.c
+++ b/drivers/tty/serial/8250/8250_lpss.c
@@ -209,7 +209,7 @@ static void qrk_serial_setup_dma(struct lpss8250 *lpss, struct uart_port *port)
 	chip->dev = &pdev->dev;
 	chip->id = pdev->devfn;
 	chip->irq = pci_irq_vector(pdev, 0);
-	chip->regs = pci_ioremap_bar(pdev, 1);
+	chip->regs = pcim_iomap(pdev, 1, 0);
 	if (!chip->regs)
 		return;
 
@@ -241,8 +241,6 @@ static void qrk_serial_exit_dma(struct lpss8250 *lpss)
 		return;
 
 	dw_dma_remove(chip);
-
-	pci_iounmap(to_pci_dev(chip->dev), chip->regs);
 }
 #else	/* CONFIG_SERIAL_8250_DMA */
 static void qrk_serial_setup_dma(struct lpss8250 *lpss, struct uart_port *port) {}
-- 
2.34.1