{"action":"created","issue":{"url":"https://api.github.com/repos/raspberrypi/linux/issues/1486","repository_url":"https://api.github.com/repos/raspberrypi/linux","labels_url":"https://api.github.com/repos/raspberrypi/linux/issues/1486/labels{/name}","comments_url":"https://api.github.com/repos/raspberrypi/linux/issues/1486/comments","events_url":"https://api.github.com/repos/raspberrypi/linux/issues/1486/events","html_url":"https://github.com/raspberrypi/linux/pull/1486","id":156279795,"number":1486,"title":"bcm2835-sdhost: wait at least 150us between read retries","user":{"login":"xdsopl","id":1153394,"avatar_url":"https://avatars.githubusercontent.com/u/1153394?v=3","gravatar_id":"","url":"https://api.github.com/users/xdsopl","html_url":"https://github.com/xdsopl","followers_url":"https://api.github.com/users/xdsopl/followers","following_url":"https://api.github.com/users/xdsopl/following{/other_user}","gists_url":"https://api.github.com/users/xdsopl/gists{/gist_id}","starred_url":"https://api.github.com/users/xdsopl/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/xdsopl/subscriptions","organizations_url":"https://api.github.com/users/xdsopl/orgs","repos_url":"https://api.github.com/users/xdsopl/repos","events_url":"https://api.github.com/users/xdsopl/events{/privacy}","received_events_url":"https://api.github.com/users/xdsopl/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":10,"created_at":"2016-05-23T13:24:33Z","updated_at":"2016-05-24T12:40:02Z","closed_at":null,"pull_request":{"url":"https://api.github.com/repos/raspberrypi/linux/pulls/1486","html_url":"https://github.com/raspberrypi/linux/pull/1486","diff_url":"https://github.com/raspberrypi/linux/pull/1486.diff","patch_url":"https://github.com/raspberrypi/linux/pull/1486.patch"},"body":"With the Compute Module I get timeout's while initializing the eMMC:\r\n\r\nmmc0: command never completed.\r\n\r\nAnd the system won't boot properly.\r\nWith this patch it boots every single time successfully and won't ever show the above error.\r\nAlso I don't see any performance regressions whatsoever.\r\n150us seems to be a magic number, as wait times below doesn't always make the eMMC initialize successfully on first retry.\r\nSo use 150us to 200us as usleep range for between read retries.\r\n\r\nSigned-off-by: Ahmet Inan <xdsopl@googlemail.com>"},"comment":{"url":"https://api.github.com/repos/raspberrypi/linux/issues/comments/221255967","html_url":"https://github.com/raspberrypi/linux/pull/1486#issuecomment-221255967","issue_url":"https://api.github.com/repos/raspberrypi/linux/issues/1486","id":221255967,"user":{"login":"xdsopl","id":1153394,"avatar_url":"https://avatars.githubusercontent.com/u/1153394?v=3","gravatar_id":"","url":"https://api.github.com/users/xdsopl","html_url":"https://github.com/xdsopl","followers_url":"https://api.github.com/users/xdsopl/followers","following_url":"https://api.github.com/users/xdsopl/following{/other_user}","gists_url":"https://api.github.com/users/xdsopl/gists{/gist_id}","starred_url":"https://api.github.com/users/xdsopl/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/xdsopl/subscriptions","organizations_url":"https://api.github.com/users/xdsopl/orgs","repos_url":"https://api.github.com/users/xdsopl/repos","events_url":"https://api.github.com/users/xdsopl/events{/privacy}","received_events_url":"https://api.github.com/users/xdsopl/received_events","type":"User","site_admin":false},"created_at":"2016-05-24T12:40:02Z","updated_at":"2016-05-24T12:40:02Z","body":"FYI: That extra delay really only helps inside or anywhere above the loop, but at no point below it."}}
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