On Thu, 4 Jun 2020 at 04:52, Yoshihiro Shimoda <yoshihiro.shimoda.uh@xxxxxxxxxxx> wrote: > > Hi Wolfram-san, > > > From: wsa+renesas@xxxxxxxxxxxxxxxxxxxx, Sent: Tuesday, June 2, 2020 9:52 PM > > > > Hi Shimoda-san, > > > > thanks for the patches and for providing a test case. I was not able to > > reproduce the issue, though. I'll explain... > > Thank you for trying to reproduce the issue! > > > > Note that this patch series is tested by using additional debug code [1], > > > because there is difficult to reproduce this issue. Before apply patch, > > > When I enabled CONFIG_DMA_API_DEBUG and CONFIG_DMA_API_DEBUG_SG, > > > I observed lacking dma unmapping on /sys/kernel/debug/dma-api/dump. > > > And then I confirmed the patch can fix the issue. > > > > So, I have this debug patch applied on top of mmc/next. I have the above > > CONFIG_ symbols enabled. I have _not_ applied your three patches which > > fix the issue. I mounted the eMMC and read a large file. I see the > > injected timeouts happening: > > > > [ 94.079560] renesas_sdhi_internal_dmac ee140000.sd: timeout waiting for SD bus idle > > [ 94.088668] renesas_sdhi_internal_dmac ee140000.sd: timeout waiting for SD bus idle > > [ 94.097727] renesas_sdhi_internal_dmac ee140000.sd: timeout waiting for SD bus idle > > [ 94.106768] renesas_sdhi_internal_dmac ee140000.sd: timeout waiting for SD bus idle > > [ 94.115848] renesas_sdhi_internal_dmac ee140000.sd: timeout waiting for SD bus idle > > [ 99.300589] renesas_sdhi_internal_dmac ee140000.sd: timeout waiting for hardware interrupt (CMD13) > > > > But I do not see any output from the DMA debug system about a missing > > unmapping. I expected that, though, because your fixes are not applied. > > The testfile could even be correctly checksummed after reading, just > > awfully slow, of course. > > I'm sorry, I should have shared my log. My test case is: > - Use dd command as background. > - Read /sys/kernel/debug/dma-api/dump while the dd command is running. > --> "ee140000.sd" lines are increased gradually. [...] Just wanted to check if this is ready to go or more tests are needed? Kind regards Uffe
