Hi, On Thu, Oct 27, 2011 at 12:18:53PM +0800, Shawn.Dong wrote: > sdhci_set_clock or sdhci_reset or sdhci_send_command may be used in > critical region which is protected by spin_lock_irqsave. Thus, these > functions will delay the responsing of the kernel interrupts. Yes, so this needs to be improved, not the delay values. > So in this case, using a mdelay will cause unnecessary latency. Our > hardware, in most case will not cause 1ms to finish its job. Using > udelay instead can reduce it. Could you guarantee this for all other SDHCI hardware out there as well? Regards, Wolfram -- Pengutronix e.K. | Wolfram Sang | Industrial Linux Solutions | http://www.pengutronix.de/ |
Attachment:
signature.asc
Description: Digital signature
