On 10/09/2013 01:18 AM, Gururaja Hebbar wrote: > On Wednesday 09 October 2013 11:33 AM, Fernandes, Joel wrote: >> Some temporary issues with my mua so forgive any artifacts in this email. >> >> On Oct 9, 2013, at 12:14 AM, "Hebbar, Gururaja" <gururaja.hebbar@xxxxxx> wrote: >> >>> On Wednesday 09 October 2013 09:58 AM, Joel Fernandes wrote: >>>> On 10/01/2013 10:04 AM, Daniel Mack wrote: >>>>> This patch makes the edma driver resume correctly after suspend. Tested >>>>> on an AM33xx platform with cyclic audio streams. >>>>> >>>>> The code was shamelessly taken from an ancient BSP tree. >>>>> >>>>> Signed-off-by: Daniel Mack <zonque@xxxxxxxxx> >>>>> --- >>>>> arch/arm/common/edma.c | 133 +++++++++++++++++++++++++++++++++++++++++++++++++ >>>>> 1 file changed, 133 insertions(+) >>> >>> ..snip.. >>> ..snip.. >>>> >>>>> + edma_cc[j]->context.ch_map = >>>>> + kzalloc((sizeof(unsigned int) * >>>>> + edma_cc[j]->num_channels), GFP_KERNEL); >>>>> + edma_cc[j]->context.que_num = >>>>> + kzalloc((sizeof(unsigned int) * 8), GFP_KERNEL); >>>> >>>> Can these allocations be moved to the suspend path? For systems that don't >>>> suspend/resume even once, I feel we shouldn't allocate memory that we don't use. >>>> These allocations are better to do there. >>> >>> AFAIK, Suspend/resume should be quick. Allocating and deallocating on >>> every iterating would be useless and time consuming. >> >> Nobody said allocate and deallocate on every iteration. Allocate once during the first suspend call and then don't have to allocate on subsequent calls. > > I couldn't find any code which allocates parameters inside suspend. > Could you show me some code which does this? Based on my last reply to Daniel, inorder to restore- there's no need to allocate/save anything. thanks, -Joel -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
