Dear, Jorge. On 11/24/2015 02:29 AM, Jorge Ramirez-Ortiz wrote: > On 11/23/2015 11:57 AM, Doug Anderson wrote: >> Jorge, >> >> On Mon, Nov 23, 2015 at 6:10 AM, Jorge Ramirez-Ortiz >> <jorge.ramirez-ortiz@xxxxxxxxxx> wrote: >>> Doug/Jaehoon, >>> >>> Were there any follow ups to this thread [1] from March 30, 2015? >>> We are seeing HLE errors on 3.18 and we are trying to determine if a solution >>> was ever delivered. >>> On inspection, I can't find anything specific in recent kernels that address >>> this particular issue (was the actual root cause identified?) >>> >>> I put together a possible work-around that avoids the HLE storm from occurring >>> for this specific SoC [2]. >>> However we'd rather not merge this -or any other similar fix- if there is a >>> generic solution already that we can pick up from mainline. >> Nothing landed that I'm aware of. Are you on SDIO, SD or eMMC? >> Trying to do UHS? > > SD even without UHS (yet, that is coming now) If you want to use the upper mode than UHS-DDR50 for SD-card, you need to apply the below patch. https://patchwork.kernel.org/patch/7456121/ Actually, this is not relevant to HLE error. When sd-card is inserted/removed quickly, then sometime dwmmc controller is occurred the HLE error. (Now, i can't see HLE error.) So i had applied the some reset processing at my official repository.(It's not generic solution.) > >> >> I know that this patch mattered for me for UHS: >> >> 7c5209c315ea mmc: core: Increase delay for voltage to stabilize from >> 3.3V to 1.8V >> >> >> Also important for UHS (for at least some folks) were patches like: >> >> 9c85f37a2984 mmc: core: Add mmc_regulator_set_vqmmc() >> >> ...that attempted to get voltages more proper... > > ack > >> >> >> In the ChromeOS tree we did just land treating HLE errors as data and >> cmd errors <https://patchwork.kernel.org/patch/5978711/>. It's not >> wonderful but it's better than letting an interrupt go off forever... > > Yes I did try this patch on 3.18 but it didn't seem to be enough for us. > Even though it would prevent the interrupt storm from flooding the kernel, once > the event triggered and the interrupt was handled no more card > insertions/ejections would be detected. If HLE error will be reproduce with the generic sequence, I think we can find the generic solution. So could you explain to me in more detail? If i can reproduce with v3.18, i will try to test it. Your case will be helpful to me for solving the HLE error. Best Regards, Jaehoon Chung > > ok, thanks for the info! > > > > > -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
