From 0353ff29b3881a8d9df65ce08a01e636868c1ef2 Mon Sep 17 00:00:00 2001 From: Marek Vasut Date: Tue, 22 May 2018 14:24:20 +0200 Subject: PCI: rcar: Poll more often in rcar_pcie_wait_for_dl() The data link active signal usually takes ~20 uSec to be asserted, poll the bit more often to avoid useless delays in this function. Use udelay() instead of usleep() for such a small delay as suggested by the timer documentation. Signed-off-by: Marek Vasut [lorenzo.pieralisi@arm.com: updated commit log] Signed-off-by: Lorenzo Pieralisi Reviewed-by: Simon Horman Cc: Geert Uytterhoeven Cc: Phil Edworthy Cc: Simon Horman Cc: Wolfram Sang Cc: linux-renesas-soc@vger.kernel.org --- drivers/pci/host/pcie-rcar.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) (limited to 'drivers/pci') diff --git a/drivers/pci/host/pcie-rcar.c b/drivers/pci/host/pcie-rcar.c index 8d161563bce8..5b999fe04c65 100644 --- a/drivers/pci/host/pcie-rcar.c +++ b/drivers/pci/host/pcie-rcar.c @@ -546,13 +546,14 @@ static int rcar_pcie_wait_for_phyrdy(struct rcar_pcie *pcie) static int rcar_pcie_wait_for_dl(struct rcar_pcie *pcie) { - unsigned int timeout = 10; + unsigned int timeout = 10000; while (timeout--) { if ((rcar_pci_read_reg(pcie, PCIETSTR) & DATA_LINK_ACTIVE)) return 0; - msleep(5); + udelay(5); + cpu_relax(); } return -ETIMEDOUT; -- cgit v1.2.3