can: sja1000: Replace mdelay with usleep_range in peak_pci_probe

peak_pci_probe() is never called in atomic context.

peak_pci_probe() is set as ".probe" in struct pci_driver.

Despite never getting called from atomic context, peak_pci_probe()
calls mdelay() to busily wait.
This is not necessary and can be replaced with usleep_range() to
avoid busy waiting.

This is found by a static analysis tool named DCNS written by myself.
And I also manually check it.

Signed-off-by: Jia-Ju Bai <baijiaju1990@gmail.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

diff --git a/drivers/net/can/sja1000/peak_pci.c b/drivers/net/can/sja1000/peak_pci.c
index 5adc95c922eef2d9f968a2dea3bac7c2dd3bfda2..a97b81d1d0da9b0b29fc622b34b6b54a06872ae8 100644 (file)
--- a/drivers/net/can/sja1000/peak_pci.c
+++ b/drivers/net/can/sja1000/peak_pci.c
@@ -608,7 +608,7 @@ static int peak_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
        writeb(0x00, cfg_base + PITA_GPIOICR);
        /* Toggle reset */
        writeb(0x05, cfg_base + PITA_MISC + 3);
-       mdelay(5);
+       usleep_range(5000, 6000);
        /* Leave parport mux mode */
        writeb(0x04, cfg_base + PITA_MISC + 3);