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Groups > linux.kernel > #1461513
| From | John Stultz <john.stultz@linaro.org> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: WARNING: CPU: 0 PID: 1271 at drivers/mmc/core/core.c:991 mmc_release_host+0xa0/0xa8 |
| Date | 2016-08-13 01:40 +0200 |
| Message-ID | <s5udr-8uq-7@gated-at.bofh.it> (permalink) |
| References | <s2FoJ-2RO-3@gated-at.bofh.it> <s5fHs-7yv-27@gated-at.bofh.it> <s5eV4-70U-11@gated-at.bofh.it> <s5fHs-7yv-25@gated-at.bofh.it> <s5gau-7IE-5@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On Fri, Aug 12, 2016 at 1:30 AM, Shawn Lin <shawn.lin@rock-chips.com> wrote: > If special req meets, mrq_pre and mrq_cur are both null after schedule > queue. And for this special req, host->claimed is released. For the > next req peeking from blk, we run into mmc_get_card again which means > we should never meet this WARN when releasing host. So it's > interesting to dig out actually what is happening there... > > But at least for dw_mmc-rockchip, we have been using this feature, > ERASE/Trim/discard, for years. I didn't see it ever. Anyway from the > code I was reading, I don't think it should be issue of this commit. > > Please look at this regression report I saw. > > https://lkml.org/lkml/2016/8/11/130 Hrm. Unfortunately I was still able to trigger the issue with the fix from that mail. thanks -john
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Re: WARNING: CPU: 0 PID: 1271 at drivers/mmc/core/core.c:991 mmc_release_host+0xa0/0xa8 John Stultz <john.stultz@linaro.org> - 2016-08-12 09:20 +0200
Re: WARNING: CPU: 0 PID: 1271 at drivers/mmc/core/core.c:991 mmc_release_host+0xa0/0xa8 Jaehoon Chung <jh80.chung@samsung.com> - 2016-08-12 10:10 +0200
Re: WARNING: CPU: 0 PID: 1271 at drivers/mmc/core/core.c:991 mmc_release_host+0xa0/0xa8 Shawn Lin <shawn.lin@rock-chips.com> - 2016-08-12 10:40 +0200
Re: WARNING: CPU: 0 PID: 1271 at drivers/mmc/core/core.c:991 mmc_release_host+0xa0/0xa8 John Stultz <john.stultz@linaro.org> - 2016-08-13 01:40 +0200
Re: WARNING: CPU: 0 PID: 1271 at drivers/mmc/core/core.c:991 mmc_release_host+0xa0/0xa8 John Stultz <john.stultz@linaro.org> - 2016-08-13 01:40 +0200
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