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PCI: rcar: Poll more often in rcar_pcie_wait_for_dl()

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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 <marek.vasut+renesas@gmail.com>
[lorenzo.pieralisi@arm.com: updated commit log]
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
Cc: Geert Uytterhoeven <geert+renesas@glider.be>
Cc: Phil Edworthy <phil.edworthy@renesas.com>
Cc: Simon Horman <horms+renesas@verge.net.au>
Cc: Wolfram Sang <wsa@the-dreams.de>
Cc: linux-renesas-soc@vger.kernel.org
This commit is contained in:
Marek Vasut 2018-05-22 14:24:20 +02:00 committed by Lorenzo Pieralisi
parent f7e1c6461e
commit 0353ff29b3
1 changed files with 3 additions and 2 deletions
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5
drivers/pci/host/pcie-rcar.c
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@ -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;