[PATCH 3/3] pci: pcie_dw_rockchip: Use udelay instead of msleep
linux.amoon at gmail.com
Thu May 6 20:40:25 CEST 2021
On Wed, 28 Apr 2021 at 00:57, Patrick Wildt <patrick at blueri.se> wrote:
> Am Tue, Apr 27, 2021 at 11:11:19AM +0530 schrieb Anand Moon:
> > hi Patrick,
> > On Tue, 27 Apr 2021 at 01:38, Patrick Wildt <patrick at blueri.se> wrote:
> > >
> > > Am Mon, Apr 26, 2021 at 01:26:32PM +0000 schrieb Anand Moon:
> > > > Use udelay instead of msleep fix the below warning.
> > >
> > > You sure that's correct? the m in msleep means milli, while the u
> > > in udelay means micro. That's a factor of 1000 of a difference.
> > >
> > Thanks for your review comments.
> > Most of the u-boot driver prefers udelay and usleep_range internally
> > calls udelay.
> > I don't have the HW to test and verify.
> > -Anand
> Sure, I'm not complaining about that. My point is that if you pass
> e. g. 8 milliseconds to a function that takes microseconds, you need
> to add the factor.
> Not good: msleep(1000) -> udelay(1000)
> Much better: msleep(1000) -> udelay(1000 * 1000)
> Which also means that you either have to rename PERST_WAIT_MS and change
> its value, or do udelay(PERST_WAIT_MS * 1000)
Thanks for this tip, can we use mdelay as sugged above.
static inline void mdelay(unsigned long msec)
udelay(1000 * msec);
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