| Message ID | 20180521170250.13224-1-marek.vasut+renesas@gmail.com |
|---|---|
| State | Superseded |
| Delegated to: | Lorenzo Pieralisi |
| Headers | show |
| Series | PCI: rcar: Poll more often in rcar_pcie_wait_for_dl() | expand |
On 05/21/2018 08:02 PM, Marek Vasut wrote: > 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 and because this will be used in atomic > content later on when the suspend/resume patches land. ^^^^^^^ context :-) > Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com> > 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 [...] MBR, Sergei
diff --git a/drivers/pci/host/pcie-rcar.c b/drivers/pci/host/pcie-rcar.c index 5c365f743df5..65ebe7aa3488 100644 --- a/drivers/pci/host/pcie-rcar.c +++ b/drivers/pci/host/pcie-rcar.c @@ -529,13 +529,13 @@ static void phy_write_reg(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); } return -ETIMEDOUT;
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 and because this will be used in atomic content later on when the suspend/resume patches land. Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com> 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 --- drivers/pci/host/pcie-rcar.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)